Aircraft Fuel Systems ASA
pdf
keyboard_arrow_up
School
Tulsa Tech - Riverside Campus *
*We aren’t endorsed by this school
Course
AIRFRAME
Subject
Mechanical Engineering
Date
Feb 20, 2024
Type
Pages
28
Uploaded by MajorSalmon4164
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
1/28
Study Session Results
Green explanations indicate questions you answered correctly.
Red explanations indicate questions you answered incorrectly.
Score 0.0%. You answered 0 out of 114 correctly.
View Performance Chart (/print_perf_chart?quiz_id=6296962)
Save Missed Questions
1.
A transmitter in a fuel pressure warning system serves what function?
A.
Transmits an electrical signal to fluid pressure.
B.
Converts fluid pressure to an electrical signal.
C.
Transmits fluid pressure directly to the indicator.
The transmitter in a fuel pressure warning system converts the pressure of the fuel into an
electrical signal that turns on a warning light or flashes a warning on an annunciator panel.
2.
How is the outlet fuel pressure regulated on a submerged, single-speed, centrifugal-type
fuel pump?
A.
By the engine-driven pump's design and internal clearance.
B.
By the first check valve downstream from the pump.
C.
By the pump's design and internal clearances.
The outlet fuel pressure produced by a submerged, single-speed, centrifugal-type fuel
pump is determined by the pump's design and its internal clearances and characteristics.
3.
A probe or a series of probes is used in what kind of fuel quantity indicating system?
A.
Selsyn.
B.
Capacitor.
C.
Synchro.
Probes, which are capacitors, are used as the fuel quantity sensing elements in a
capacitor-type, fuel quantity indicating system.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
2/28
4.
When an aircraft is fueled from a truck or fuel farm that has not been contaminated, daily
draining
A.
is not required because fuel trucks and fuel farms may make use of laser contaminant
identification technology.
B.
of strainers and sumps is combined with periodic filter changes and inspection to ensure
fuel is contaminant free.
C.
is only required if the fuel truck or farm has not been in continuous service.
Even though an aircraft is fueled from an uncontaminated source, the fuel tank sumps and
strainers must be periodically checked, as there is always the possibility of contamination
from other sources.
5.
The primary purpose of an aircraft's fuel jettison system is to quickly achieve a
A.
lower landing weight.
B.
balanced fuel load.
C.
reduced fire hazard.
Some aircraft are allowed to have a higher takeoff weight than is allowed for landing.
These aircraft must have a fuel jettison system that allows the pilot or flight engineer to
safely dump, or jettison, enough fuel to reduce the aircraft weight to its allowable landing
weight.
6.
Pressure fueling of aircraft is usually accomplished through
A.
pressure connections on individual fuel tanks.
B.
at least one single point connection.
C.
individual fuel tank overwing and/or fuselage access points.
A manifold fuel system allows an aircraft to be fueled by the pressure fueling method. All
of the tanks can be fueled at the same time through a single manifold connection. This
reduces the fueling time, minimizes the chance of contamination, and minimizes the
buildup of static electrical charges.
7.
What should be used to inert an integral fuel tank before attempting repairs?
A.
CO(2).
B.
Water.
C.
Steam.
Before working inside an integral fuel tank, you should inert it (replace the gasoline fumes
with an inert gas).
Integral fuel tanks can be inerted by filling them with CO(2).
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
3/28
8.
What is the purpose of a float-operated transmitter installed in a fuel tank?
A.
It sends an electric signal to the fuel quantity indicator.
B.
It senses the total amount of fuel density.
C.
It senses the dielectric qualities of fuel and air in the tank.
A float-operated fuel quantity transmitter is normally a variable resistor whose resistance
changes with the fuel level in the tank. Information on the fuel level is sent as an electrical
signal to the fuel quantity indicator on the instrument panel.
9.
(1) Gas-turbine-engine fuel systems are very susceptible to the formation of ice in the fuel
filters.
(2) A fuel heater operates as a heat exchanger to warm the fuel.
Regarding the above statements,
A.
only 1 is true.
B.
only 2 is true.
C.
both 1 and 2 are true.
Statement 1 is true. Gas-turbine-engine fuel systems are very susceptible to the formation
of ice on the fuel filters.
Statement 2 is also true. The fuel heater operates as a heat exchanger to warm the fuel.
These heat exchangers may use engine compressor bleed air or warm engine oil to
furnish the heat.
10.
A drip gauge may be used to measure
A.
the amount of fuel in the tank.
B.
system leakage with the system shut down.
C.
fuel pump diaphragm leakage.
A drip gauge is used to measure the quantity of fuel in a fuel tank when the aircraft is on
the ground.
The drip gauge is pulled down from the bottom of the tank until fuel begins to drip from its
end. The quantity of fuel in the tank is indicated on the gauge by the amount the gauge is
pulled from the tank before it begins to drip.
11.
Why are centrifugal-type boost pumps used in fuel systems of aircraft operating at high
altitude?
A.
Because they are positive displacement pumps.
B.
To supply fuel under pressure to engine-driven pumps.
C.
To permit cooling air to circulate around the motor.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
4/28
Centrifugal boost pumps are used in the fuel tanks of aircraft that operate at high altitude.
Boost pumps supply fuel under positive pressure to the inlet of the engine-driven fuel
pumps under conditions where the ambient pressure is too low to ensure a positive
supply.
12.
When inspecting a removable rigid fuel tank for leaks, what procedure should be
followed?
A.
pressurize the tank with air and brush with soapy water.
B.
fill the tank with water and pressurize with air and brush with soapy water.
C.
pressurize the tank with air and submerge in water to locate leaks.
After a removable rigid fuel tank has been repaired, it should be pressurized with no more
than 1/2-psi air pressure, and all seams and the repaired area should be inspected by
brushing on liquid soap or a soap bubble solution to check for any indication of leaks.
13.
A fuel jettison system is required under certain conditions if the maximum takeoff weight
exceeds the maximum landing weight. What regulations cover the requirements of fuel
jettisoning?
A.
14 CFR Parts 43 and 91.
B.
14 CFR Parts 23 and 25 and CAM 4b.
C.
14 CFR Parts 21 and 43 and CAM 8.
The regulations governing fuel jettisoning systems are covered in 14 CFR Parts 23 and
25, and in the Civil Air Regulations Part 04 for aircraft that were certificated by the Civil
Aeronautics Administration before the formation of the FAA.
14.
What is used in many aircraft to prevent bubbles in the fuel after it leaves the tank when
atmospheric pressure is lower than fuel vapor pressure?
A.
Air-fuel separators.
B.
Anti-foaming additives.
C.
Boost pumps.
Boost pumps installed in many aircraft fuel tanks have an agitator on their shaft along with
the impeller. The agitator causes bubbles in the fuel to be released into the tank before the
fuel is forced into the fuel lines. The boost pumps hold a pressure on the fuel in the lines
to prevent additional vapors from forming.
15.
Some turbine powered aircraft have a fuel temperature indicator located in the flight deck
to
A.
monitor the fuel flow in the event that ice crystals form in the fuel system.
B.
monitor the fuel temperature during high altitude flight.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
5/28
C.
ascertain the amount of fuel onboard the aircraft when ice starts to form in the fuel tanks.
The fuel temperature indicator allows the crew to monitor the fuel temperature during high
altitude flight in extremely frigid conditions.
16.
What is the recommended practice for cleaning a fuel tank before welding?
A.
Purge the tank with air.
B.
Flush the inside of the tank with clean water.
C.
Steam clean the tank interior.
Before a gasoline tank is welded, it should be washed out with hot water and a detergent.
Then, live steam should be passed through the tank for about a half hour.
This treatment vaporizes and removes any residual fuel that may be left in the tank.
17.
Fuel baffles are installed in tanks to prevent ______________________ caused by
changes in the attitude of the aircraft.
A.
vapors
B.
surging
C.
starvation
Baffles are installed in aircraft fuel tanks to prevent the fuel sloshing or surging in the tank
caused by changes in attitude of the aircraft.
18.
What method is used on turbine-powered aircraft to determine when the condition of the
fuel is approaching the danger of forming ice crystals?
A.
Fuel pressure warning.
B.
Fuel pressure gauge.
C.
Fuel temperature indicator.
Fuel temperature indicating systems are required in turbine aircraft to warn when there is
danger of ice crystals forming in the fuel.
A fuel strainer differential pressure gauge gives an indication that ice crystals have already
formed and are restricting the fuel filter. Ice crystals on the filter element cause an
excessive pressure drop across the filter.
19.
In an electronic-type fuel quantity indicating system, the tank sensing unit is a
A.
capacitor.
B.
variable resistor.
C.
variable inductor.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
6/28
The fuel tank transmitters in an electronic-type fuel quantity indicating system are
capacitors.
A tank probe (transmitter) is made of two concentric metal tubes that act as the plates of a
capacitor. The fuel in the tank and the air above the fuel act as the dielectric. The
capacitance of the probe is determined by the relative amount of fuel and air between the
plates.
20.
The purpose of a diaphragm in a vane-type fuel pump is to
A.
equalize fuel pressure at all speeds.
B.
vary fuel pressure according to throttle setting.
C.
compensate fuel pressures to altitude changes.
The diaphragm in a compensated vane-type fuel pump is used to compensate the fuel
pressure for altitude changes.
It maintains the fuel pressure a constant amount above the pressure of the ambient air.
21.
A typical large transport aircraft fuel manifold system allows how many of the following?
1. All tanks can be serviced through a single connection.
2. Any engine can be fed from any tank.
3. All engines can be fed from all tanks simultaneously.
4. A damaged tank can be isolated from the rest of the fuel system.
A.
1 and 2.
B.
1, 2, and 3.
C.
1, 2, 3, and 4.
In a large aircraft manifold fuel system, all tanks can be serviced through a single
connection, any engine can be fed from any tank, all engines can be fed from all tanks
simultaneously, and a damaged tank can be isolated from the rest of the fuel system.
22.
A fuel pressure relief valve is required on an aircraft
A.
positive-displacement fuel pump.
B.
centrifugal boost fuel pump.
C.
positive-displacement fuel pump and centrifugal boost fuel pump.
A pressure relief valve is required for a positive-displacement aircraft fuel pump. A
pressure relief valve is not needed with a centrifugal fuel boost pump.
23.
(1) A fuel pressure gauge is a differential pressure indicator.
(2) A fuel pressure gauge indicates the pressure of the fuel entering the carburetor.
Regarding the above statements,
A.
only 2 is true.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
7/28
B.
both 1 and 2 are true.
C.
neither 1 nor 2 is true.
Statement 1 is true. Most fuel-pressure gauges are differential pressure gauges. They
measure the difference in the pressure of the fuel and the pressure of some reference air.
When a pressure carburetor is used, this reference air pressure is the carburetor upper-
deck air pressure.
Statement 2 is also true. The pressure shown on the gauge is the pressure of the fuel as it
enters the carburetor.
24.
How many engine driven fuel pumps per engine are required for engines requiring fuel
pumps?
A.
Two engines can share one fuel pump.
B.
One fuel pump for each engine.
C.
Two fuel pumps for each engine.
For reciprocating engine installations having fuel pumps to supply fuel to the engine, at
least one pump for each engine must be directly driven by the engine and must meet 14
CFR Part 23. This pump is the main pump. There must be at least one main fuel pump for
each turbine engine.
25.
In some aircraft with several fuel tanks, the possible danger of allowing the fuel supply in
one tank to become exhausted before the selector valve is switched to another tank is
prevented by the installation of
A.
a fuel pressure warning signal system.
B.
a fuel pressure relief valve.
C.
an engine fuel pump bypass valve.
Fuel pressure warning signal systems are installed in many large aircraft to warn the pilot
or flight engineer that a tank has been emptied and a full tank should be selected.
26.
An aircraft's integral fuel tank is
A.
usually located in the bottom of the fuselage.
B.
a part of the aircraft structure.
C.
a self-sealing tank.
An aircraft integral fuel tank is actually a portion of the aircraft structure that is sealed off
and is used as a fuel tank.
27.
Select one means of controlling the fuel temperature on turbine-powered aircraft.
A.
Engine bleed air to the fuel filter.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
8/28
B.
Engine bleed air to the fuel tank.
C.
Engine bleed air to a heat exchanger.
Ice is prevented from clogging the filter of a turbine-powered aircraft fuel system by routing
warm compressor bleed air through an air-to-fuel heat exchanger.
All of the fuel that flows to the engine must pass through this heat exchanger.
28.
The electronic-type fuel quantity indicating system consists of a bridge circuit,
A.
an amplifier, an indicator, and a tank unit.
B.
a tank, an amplifier, and an indicator.
C.
a tank unit, a tank, and an amplifier.
An electronic (capacitance-type) fuel quantity indicating system contains the following
parts:
- Capacitor probes, mounted in the tanks.
- A bridge circuit to measure the capacity of the probes.
- An amplifier to increase the amplitude of the signal from the bridge circuit to a value high
enough to drive the indicator.
- An indicator mounted in the instrument panel to show the amount of fuel in the tanks.
29.
What type of remote-reading fuel quantity indicating system has several probes installed
in each fuel tank?
A.
Electromechanical.
B.
Electronic.
C.
Direct reading.
The electronic (capacitance-type), remote-reading, fuel-quantity-indicating system has
several probes installed in each fuel tank.
The total capacity of the probes accurately relates to the amount of fuel in the tank.
30.
When fuel quantity is measured in pounds instead of gallons, the measurement will be
more accurate because fuel volume
A.
varies with temperature change.
B.
increases when temperature decreases.
C.
varies with changes in atmospheric pressure.
An indication of the weight of the fuel in an aircraft fuel tank is more important than a
measure of its volume. The engine uses the fuel on the basis of its weight, and the volume
of the fuel in the tanks changes as the temperature of the fuel changes.
31.
What type of fuel-booster pump requires a pressure relief valve?
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
9/28
A.
Concentric.
B.
Sliding vane.
C.
Centrifugal.
A sliding vane fuel pump requires a pressure-relief valve because it is a constant-
displacement pump.
32.
A fuel totalizer is a component which indicates the
A.
total amount of fuel being consumed by all engines.
B.
amount of fuel in any given tank.
C.
amount of fuel in all tanks.
A fuel totalizer is a single instrument that gives an indication of the total quantity of the fuel
remaining on board the aircraft.
The totalizer adds the quantities of the fuel in all of the tanks.
33.
(1) A fuel heater can use engine bleed air as a source of heat.
(2) A fuel heater can use engine lubricating oil as a source of heat.
Regarding the above statements,
A.
only 1 is true.
B.
both 1 and 2 are true.
C.
neither 1 nor 2 is true.
Statement 1 is true. A fuel heater can use engine bleed air as a source of heat.
Statement 2 is also true. A fuel heater can use engine lubricating oil as a source of heat.
34.
What is the primary purpose of the crossfeed system?
A.
It allows any tank to supply fuel to any engine.
B.
It bypasses the engine shutoff valve if it fails.
C.
It divides the fuel and sends it to the injectors.
A crossfeed system allows any engine on a multiengine aircraft to be fed from any tank.
This can be used to maintain a balanced fuel load.
35.
What should be used to remove flux from an aluminum tank after welded repairs?
A.
Soft brush and warm water.
B.
Five percent solution of nitric or sulfuric acid.
C.
Mild solution of soap and warm water.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
10/28
Promptly, upon completion of welding, wash the inside and outside of the tank with liberal
quantities of hot water and then drain.
Next, immerse the tank in either a 5 percent nitric-acid or 5 percent sulfuric-acid solution.
36.
The probe of a capacitance-type fuel level gauge is essentially a
A.
float-actuated variable capacitor.
B.
capacitor with fuel and air acting as one plate.
C.
capacitor with fuel and air acting as a dielectric.
A capacitance-type, fuel quantity indicating system uses a capacitor (condenser) as a tank
probe. Fuel and air are the dielectric between the plates of the probe.
37.
Why is the main fuel strainer located at the lowest point in the fuel system?
A.
It traps any small amount of water that may be present in the fuel system.
B.
It is near the fuel tank heater to help prevent vapor lock in the system.
C.
It filters and traps all micro-organisms that may be present in the fuel system.
One reason for having the main fuel strainer of an aircraft located at the lowest point in the
fuel system is so it will trap and hold any small amount of water that is in the fuel system.
38.
Fuel jettisoning past the limits prescribed by Federal Aviation Regulations is usually
prevented by
A.
closely monitoring the fuel quantity and turning off the fuel dump switch(es).
B.
dump limit valves or a low-level circuit.
C.
standpipes in the fuel tanks.
Fuel tanks whose fuel can be jettisoned are equipped with a dump limit switch that will
shut off the flow to the dump chute if the pressure drops below that needed to supply the
engine with adequate fuel, or when the tank level reaches a preset dump shutoff level.
39.
The function of a fuel heater is to
A.
protect the engine fuel system from ice formation.
B.
protect the fuel from freezing.
C.
heat the fuel to combustion temperature.
The function of a fuel heater is to protect the engine fuel system from ice formation. It can
also be used to thaw ice that has formed on the fuel screen.
40.
How may the antiknock characteristics of a fuel be improved?
A.
By adding a knock inhibitor.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
11/28
B.
By adding a knock enhancer.
C.
By adding a fungicide agent.
The antiknock characteristics of a fuel may be improved by adding a knock inhibitor such
as tetraethyl lead to the fuel.
41.
Before fueling an aircraft by using the pressure fueling method, what important precaution
should be observed?
A.
The truck pump pressure must be correct for that refueling system.
B.
The truck pump pressure must be adjusted for minimum filter pressure.
C.
The aircraft's electrical system must be on to indicate quantity gauge readings.
Before fueling an aircraft, it is important that the fuel truck pump pressure be correct for
the refueling system.
Some systems, such as that used on the Boeing 727, require a maximum fuel delivery
pressure of 50 psi. The delivery pressure varies with the different aircraft.
42.
An electrical type fuel quantity indicating system consists of an indicator in the flight deck
and a float
A.
in the tank that moves a connecting arm to the wiper on a variable resistor in the tank.
B.
attached to a rod that moves up or down in a calibrated cylinder.
C.
in the tank that operates with alternating current and uses constant resistance in a circuit
to drive a ratiometer-type indicator.
Electric fuel quantity indicators operate with DC and use variable resistance in a circuit to
drive a ratiometer-type indicator. The movement of a float in the tank moves a connecting
arm to the wiper on a variable resistor in the tank unit. This resistor is wired in series with
one of the coils of the ratiometer-type fuel gauge in the instrument panel. Changes to the
current flowing through the tank unit resistor change the current flowing through one of the
coils in the indicator. This alters the magnetic field in which the indicating pointer pivots.
The calibrated dial indicates the corresponding fuel quantity.
43.
Which aircraft fuel quantity indicating system incorporates a signal amplifier?
A.
Electronic.
B.
Sight glass.
C.
Electrical.
An electronic (capacitance-type) fuel quantity indicating system incorporates a signal
amplifier.
44.
What method would be used to check for internal leakage of a fuel valve without removing
the valve from the aircraft?
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
12/28
A.
Place the valve in the OFF position, drain the strainer bowl, and with boost pump on,
watch to see if fuel flows to the strainer bowl.
B.
Remove fuel cap(s), turn boost pump(s) on, and watch for bubbling in the tanks.
C.
Apply regulated air pressure on the downstream side of the fuel pump and listen for air
passing through the valve.
Internal leakage in a fuel valve can be checked by placing the valve in the OFF position
and then draining the fuel strainer bowl.
Turn the fuel tank boost pump on. If fuel flows into the empty strainer bowl, the valve has
an internal leak.
45.
The purpose of the baffle plate in a fuel tank is to
A.
provide an expansion space for the fuel.
B.
resist fuel surging within the fuel tank.
C.
provide internal structural integrity.
Baffle plates in a fuel tank resist (prevent) the fuel from surging in the tank.
46.
A digital fuel totalizer automatically indicates the amount of fuel used, fuel remaining,
current rate of consumption, and fuel
A.
weight aboard at takeoff.
B.
remaining at the 45-minute IFR fuel reserve.
C.
remaining, flight time at the current power setting.
A fuel totalizer is a fuel quantity indicator that gives the total amount of fuel remaining on
board the aircraft on one instrument. The totalizer adds the quantites of fuel in all of the
tanks and gives the pilot an indication of the total number of pounds of fuel remaining.
47.
To prevent vapor lock in fuel lines at high altitude, some aircraft are equipped with
A.
vapor separators.
B.
direct-injection-type carburetors.
C.
booster pumps.
Booster pumps are installed in the fuel tanks of some aircraft to prevent vapor lock in the
fuel lines at high altitudes.
The booster pump holds a positive pressure on the fuel in the lines, between the tank and
the engine-driven fuel pump.
48.
Why is the capacitance fluid quantity indicating system more accurate in measuring fuel
level than a mechanical type?
A.
Only one probe and one indicator are necessary for multiple tank configurations.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
13/28
B.
It measures in gallons and converts to pounds.
C.
It measures by weight instead of volume.
The electronic (capacitor-type) fuel quantity indicating system is more accurate than other
types of systems used for measuring fuel quantity.
These systems use several capacitor-type probes extending across each tank from top to
bottom. When the attitude of the aircraft changes, fuel rises in some probes and lowers in
others. The total capacitance of all probes remains constant as the aircraft attitude
changes. This causes the fuel-level indication to remain constant as attitude changes.
The dielectric constant of the fuel changes with its density. Therefore, the system is able to
determine the mass (weight) of the fuel rather than its volume.
49.
The primary purpose of a fuel tank sump is to provide a
A.
way to shut off fuel flow or to route the fuel to a desired location.
B.
place for contaminants and water to settle, with a drain valve to remove the impurities.
C.
way to manually operate valves on a fuel tank to isolate or direct fuel to a pump.
Fuel tanks are equipped with sumps (low points in the tank) in which water and dirt will
accumulate to be collected and drained.
50.
What are the four general types of fuel quantity gauges?
A.
Sight glass, mechanical, electrical, and electronic.
B.
Electrical, electronic, bourbon tube, and litmus indicator.
C.
Electrical, direct reading static pressure type, sight glass, and litmus indicator.
The types of fuel quantity indicating systems used in aircraft are sight glasses, mechanical
systems, electrical systems, and electronic systems.
51.
When inspecting a fuel system, you should check all valves located downstream of boost
pumps with the pumps
A.
at idle.
B.
dormant.
C.
operating.
In order to inspect a fuel system for leaks, you should inspect all of the valves located
downstream of the booster pump, with the pumps operating and producing maximum
pressure.
52.
The vapor pressure of aviation gasoline is
A.
lower than the vapor pressure of automotive gasoline.
B.
higher than the vapor pressure of automotive gasoline.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
14/28
C.
approximately 20 psi at 100°F.
The vapor pressure of aviation gasoline is limited to a maximum of 7 psi, which is lower
than the vapor pressure of many grades of automobile gasoline.
53.
Why are integral fuel tanks used in many large aircraft?
A.
To reduce fire hazards.
B.
To facilitate servicing.
C.
To reduce weight.
Integral fuel tanks are used in large aircraft to reduce weight and to utilize as much of the
space as possible for carrying fuel.
54.
If a bladder-type fuel tank is to be left empty for an extended period of time, the inside of
the tank should be coated with a film of
A.
engine oil.
B.
linseed oil.
C.
ethylene glycol.
If a rubberized fabric bladder tank is to remain empty for an extended period of time, it
should be cleaned out thoroughly and its interior covered with a film of clean engine oil.
55.
If it is necessary to enter an aircraft's fuel tank, which procedure should be avoided?
A.
Continue purging the tank during the entire work period.
B.
Station an assistant outside the fuel tank access to perform rescue operations if required.
C.
Conduct the defueling and tank purging operation in an air-conditioned building.
You are asked which procedure should be avoided.
All defueling and purging must be done outside, not in any building, air-conditioned or
otherwise.
56.
Fuel heaters are used with fuel systems for turbine engines to prevent ____________ in
the fuel from clogging system filters.
A.
moisture
B.
ice crystals
C.
contamination
Turbine powered aircraft incorporate fuel heaters to prevent ice crystals from forming in
the fuel and clogging the fuel system filters.
57.
A fuel system must be designed to prevent fuel-vapor ignition caused by
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
15/28
A.
over-heating.
B.
back-fire.
C.
lightning.
A fuel system must be designed to prevent fuel-vapor ignition caused by lightning.
58.
Microbial growth is produced by various forms of microorganisms that live and multiply in
the water interfaces of jet fuels. Which of the following could result if microbial growth
exists in a jet fuel tank and is not corrected?
A.
Interference with fuel flow, interference with fuel quantity indicators, and electrolytic
corrosive action in a metal tank.
B.
Interference with fuel quantity indicators, engine seizure, or a lower grade rating of the
fuel.
C.
Interference with fuel flow, lower grade rating of the fuel, or electrolytic corrosive action in
a rubber tank.
The buildup of microorganisms in the fuel tank of a jet aircraft can not only interfere with
fuel flow and with the fuel quantity indicators, but more importantly, can start electrolytic
corrosion in metal fuel tanks.
59.
The use of turbine fuels in aircraft has resulted in some problems not normally associated
with aviation gasolines. One of these problems is
A.
increasing viscosity of fuel as fuel temperature lowers at altitude.
B.
higher vapor pressure.
C.
microbial contaminants.
Microbial contamination is a fuel system problem that is associated with the higher
viscosity fuel used in turbine engine aircraft.
Turbine engine fuel holds water more readily than gasoline. Microorganisms live in this
water and form a scum which clogs the fuel filters, lines, and fuel controls. The scum holds
water against the fuel tank structure and causes tank corrosion.
60.
Which procedure must be followed when defueling aircraft with sweptback wings?
A.
Defuel all the tanks at one time.
B.
Defuel the inboard wing tanks first.
C.
Defuel the outboard wing tanks first.
Unless the service manual specifies otherwise, the outboard fuel tanks on an aircraft with
swept back wings should be defueled first.
This procedure minimizes the twisting effect on the wing caused by the fuel being located
behind the wing attachment points on the fuselage.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
16/28
61.
What markings must be placed on or near each appropriate fuel filler cover on standard
category aircraft?
A.
The word 'Avgas' and the minimum fuel grade, and the total fuel tank capacity.
B.
The word 'Avgas' and the minimum fuel grade or designation for the engines, and the
usable fuel tank capacity.
C.
The word 'Avgas' and the minimum fuel grade.
The fuel filler openings must be marked at or near the filler cover with the word 'Avgas'
and the minimum fuel grade.
If the airplane is turbine-engine-powered, the markings must include the words 'Jet Fuel'
and the permissible fuel designations or reference to the AFM for permissible fuel
designations.
62.
Why is it necessary to vent all aircraft fuel tanks?
A.
To ensure a positive head pressure for a submerged boost pump.
B.
To exhaust fuel vapors.
C.
To limit pressure differential between the tank and atmosphere.
Fuel tanks must be vented with the vents having sufficient capacity to allow the rapid relief
of excessive pressure between the interior and the exterior of the tank.
63.
Many fuel tanks incorporate _________________ valves to prevent fuel from flowing
away from the boost pump or tank outlet when the aircraft is in a high 'G' maneuver.
A.
flapper
B.
check
C.
dump
Many fuel tanks incorporate flapper valves that prevent fuel in the tank from flowing away
from the boost pump or tank outlet any time the aircraft is in a high-G maneuver. These
valves are normally open, but if a maneuver causes the fuel to flow away from the pump
or outlet, they flap shut until the force moving the fuel no longer exists, then they
automatically open.
64.
What can be done to eliminate or minimize the microbial growth problem in an aircraft jet
fuel tank?
A.
Use anti-icing and antibacterial additives.
B.
Add CO(2) as a purgative.
C.
Keep the fuel tank topped off.
An anti-icing and antibacterial additive is often used in jet aircraft fuel tanks to minimize
the problems caused by microbial growth inside the fuel tanks.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
17/28
65.
Flapper valves are used in fuel tanks to
A.
reduce pressure.
B.
prevent a negative pressure.
C.
act as check valves.
Flapper valves are used in fuel tanks to serve as check valves.
Flapper valves allow fuel to flow to the booster pump but prevent its flowing away from the
pump during certain flight maneuvers.
66.
Which of the following would be most useful to locate and troubleshoot an internal fuel
leak in an aircraft fuel system?
A.
Structural repair manual.
B.
Orthographic projection troubleshooting tree.
C.
Maintenance manual diagrams and descriptions.
Close visual inspection is required whenever a leak or defect is suspected in a fuel
system. Follow the aircraft manufacturer's instructions on the repair of fuel leaks and the
requirements that need to be met for airworthiness.
67.
A transducer in a fuel pressure system serves what function?
A.
Transmits an electrical signal to the transmitter for fluid pressure.
B.
Transmits electrical signal proportional to the fluid pressure.
C.
Converts fluid pressure directly through a transmitter to the indicator.
A transducer is a device that changes energy from one form into another. A fuel pressure
transducer converts fuel pressure into an electrical signal that is proportional to the fuel
pressure. This signal is transmitted to the fuel pressure indicator.
68.
On a large aircraft pressure refueling system, a pressure refueling receptacle and control
panel will permit one person to
A.
fuel or defuel any of the tanks on an aircraft.
B.
fuel any of the tanks on an aircraft.
C.
defuel any of the tanks on an aircraft.
Large aircraft pressure fueling systems consist of a refueling receptacle and a panel of
controls and gauges that permit one person to fuel or defuel any or all fuel tanks of an
aircraft.
69.
What is one purpose of a fuel tank vent?
A.
To maintain atmospheric pressure.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
18/28
B.
To decrease fuel vapor pressure.
C.
To decrease tank internal air pressure.
A fuel tank vent maintains atmospheric pressure on top of the fuel in the tank to provide
for proper fuel flow from the tank to the engine.
70.
When installing a rigid fuel line, 1/2 inch in diameter, at what intervals should the line be
supported?
A.
24 inches.
B.
12 inches.
C.
16 inches.
Rigid fuel lines installed in an aircraft should be supported by clamps or brackets at the
distances specified in AC 43.13-1B.
For a 1/2-inch line, the supports should be installed every 16 inches along the run of the
line.
71.
What unit is generally used to actuate the fuel pressure warning system?
A.
Fuel flowmeter.
B.
Pressure-sensitive mechanism.
C.
Fuel pressure gauge.
A pressure-sensitive mechanism (generally a bellows) is used to actuate the fuel pressure
warning system.
72.
Which statement concerning an electronic capacitance-type fuel quantity indicating
system is true?
A.
It has no moving parts in the tank.
B.
It has two tubes separated by an electronic field in the tank.
C.
It utilizes a variable capacitor to indicate the fuel tank capacity.
The capacitance-type, fuel-quantity-indicating system uses probes with no moving parts
inside the tank.
These probes are made of two concentric tubes that serve as the plates of a capacitor.
Fuel and air act as the dielectric.
73.
One advantage of electrical and electronic fuel quantity indicating systems is that the
indicator
A.
can be located any distance from the tank(s).
B.
has no movable devices.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
19/28
C.
always measures volume instead of mass.
Most modern aircraft use electrical or electronic fuel-quantity-indicating systems because
of the ease with which the indicator can be located a distance from the fuel tanks.
74.
What is the maximum vapor pressure allowable for an aircraft fuel?
A.
7 psi.
B.
5 psi.
C.
3 psi.
A Reid vapor pressure of 7 psi at 100°F is the maximum allowed for aviation gasoline.
75.
The location of leaks and defects within the internal portions of the fuel system can usually
be determined by
A.
visual inspection for evidence of wet spots and stains, and feeling for unusually warm
components.
B.
performing a fuel flow check.
C.
observing the pressure gauge and operating the selector valves.
It is possible, by watching the fuel pressure gauge and operating the selector valves, to
isolate a portion of a large-aircraft fuel system that has an internal leak.
76.
What must each fuel quantity indicator be calibrated to read during level flight when the
quantity of fuel remaining is equal to the unusable fuel supply?
A.
The total unusable fuel quantity.
B.
Both the total unusable fuel quantity and the unusable fuel quantity in each tank.
C.
Zero.
Each fuel quantity indicator must be calibrated to read 'zero' during level flight when the
quantity of the fuel remaining in the tank is equal to the unusable fuel supply.
77.
What is the purpose of flapper-type check valves in integral fuel tanks?
A.
To allow defueling of the tanks by suction.
B.
To prevent fuel from flowing away from the boost pumps.
C.
To allow the engine-driven pumps to draw fuel directly from the tank if the boost pump
fails.
Some integral fuel tanks have flapper-type check valves that allow fuel to flow to the
booster pump, but prevent rough air or abrupt flight maneuvers from causing the fuel to
flow away from the booster pump.
Some aircraft also have a pump-removal, flapper-type check valve that allows a booster
pump to be removed from the tank without having to first drain the tank.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
20/28
78.
According to Part 23, what minimum required markings must be placed at or near each
appropriate fuel filler cover for reciprocating engine-powered airplanes?
A.
The word 'Avgas' and the minimum fuel grade.
B.
The word 'Fuel' and usable fuel capacity.
C.
The word 'Avgas' and the total fuel capacity.
Fuel filler openings for reciprocating engine-powered airplanes must be marked at or near
the filler cover with the word 'Avgas' and the minimum fuel grade.
79.
A fuel pressure warning switch contacts close and warning light is turned on when
A.
a measured quantity of fuel has passed through it.
B.
the fuel flow stops.
C.
the fuel pressure drops below specified limits.
The fuel pressure warning switch contacts close and a warning light turns on when the
fuel pressure drops below a specified limit.
80.
(Refer to Figure 17.) What is the purpose of the pump crossfeed valve?
A.
Balance the fuel in the tanks.
B.
Allow operation of engines from one tank.
C.
Allow operation of the left engine when the right fuel-boost pump is inoperative.
The pump crossfeed valve shown here allows both engines to operate from either of the
two tanks.
81.
What is the dielectric (nonconducting material) in a capacitance-type fuel quantity
indicating system?
A.
Outer shell of the capacitor.
B.
Fuel in the tank.
C.
Fuel and air in the tank.
The dielectric used in the tank probes of a capacitor-type fuel quantity indicating system is
the fuel and the air in the tank above the fuel.
Fuel has a dielectric constant of approximately two. Air has a dielectric constant of one.
82.
A capacitance-type fuel quantity indicating system measures fuel in
A.
pounds.
B.
pounds per hour.
C.
gallons.
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
21/28
A capacitance-type fuel quantity indicating system measures the density of the fuel (the
dielectric constant of the fuel changes with its density). It indicates the quantity of fuel in
pounds rather than in gallons.
83.
When routing a fuel line between two rigidly mounted fittings the line should
A.
have at least one bend between such fittings.
B.
be a straight length of tubing and clamped to the aircraft structure.
C.
have a flexible line added between two metal lines to allow for ease of installation.
Never install a straight length of tubing between two rigidly mounted fittings. Always
incorporate at least one bend between such fittings to absorb strain caused by vibration
and temperature changes.
84.
What is the minimum distance allowed between a fuel tank and the fire wall separating the
engine?
A.
One-half inch.
B.
One inch.
C.
Two inches.
There must be at least one-half inch of clearance between the fuel tank and the firewall.
85.
Fuel is moved overboard in most fuel jettison systems by
A.
boost pumps.
B.
gravity.
C.
gravity and engine-driven fuel pumps.
Fuel is moved overboard in a jettison system by boost pumps located in the fuel tanks.
86.
Which of the following tests can determine an aviation gasoline's tendency to vapor lock?
A.
Reid vapor pressure test.
B.
Octane vapor pressure test.
C.
True vapor pressure test.
The Reid vapor pressure of a fuel is a measure of the fuel's tendency to vapor lock.
87.
What is one disadvantage of using aromatic aviation fuels?
A.
A fuel intercooler is required.
B.
Deteriorates rubber parts.
C.
Results in low fuel volatility.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
22/28
Aromatic additives in aviation gasoline increase its antidetonation characteristics, but they
also cause deterioration of rubber parts.
Any hose, seal, or diaphragm used with a fuel that contains aromatic additives must be
specifically formulated to withstand these additives.
88.
What precautions must be observed if a gravity-feed fuel system is permitted to supply
fuel to an engine from more than one tank at a time?
A.
The tank airspaces must be interconnected.
B.
The fuel outlet ports of each tank must have the same cross-sectional area.
C.
Each tank must have a valve in its outlet that automatically shuts off the line when the tank
is empty.
If a gravity-feed fuel system is permitted to supply fuel to an engine from more than one
tank at a time, the air space above the fuel in the tanks must be interconnected.
89.
The type of fuel-boost pump that separates air and vapor from the fuel before it enters the
line to the carburetor is the
A.
gear-type pump.
B.
centrifugal-type pump.
C.
sliding vane-type pump.
Centrifugal boost pumps normally have a small agitator (a small propeller) that spins when
the pump impeller is turning to separate the vapor from the fuel before the fuel enters the
lines to the carburetor.
90.
When defueling an aircraft, which of the following must be accomplished?
A.
Defuel inside the hangar when fire suppression is available.
B.
Defuel outside the hangar when possible.
C.
Always defuel outside the hangar.
Both fueling and defueling operations should be conducted in the open air where there is
good ventilation.
91.
Fuel jettisoning is usually accomplished
A.
through a common manifold and outlet in each wing.
B.
by gravity flow into the outboard wing tanks and overboard through a common outlet in
each wing.
C.
through individual outlets for each tank.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
23/28
Fuel jettisoning is usually accomplished by a fuel dump manifold, which connects the
dumpable fuel tanks to the dump valves and to a fixed or extendable dump chute in each
wing.
92.
Aircraft pressure fueling systems instructional procedures are normally placarded on the
A.
fuel control panel access door.
B.
lower wing surface adjacent to the access door.
C.
aircraft ground connection point.
Pressure fueling instructional procedures are normally placarded on the fuel control panel
access door.
No one should fuel an aircraft with a fuel pressure fueling system unless he or she has
been thoroughly checked out on the procedure.
93.
The fuel jettison valve must be designed to allow flight personnel
A.
to close the valve at any time and the fuel must discharge clear of the aircraft.
B.
to discharge fuel clear of the aircraft.
C.
to close the valve at anytime.
The fuel jettison valve must be designed to allow flight personnel to close the valve during
any part of the jettisoning operation. During the fuel-jettisoning operation, the fuel must
discharge clear of any part of the airplane.
94.
Which gas is used for purging an aircraft fuel tank?
A.
Helium or argon.
B.
Carbon dioxide.
C.
Carbon monoxide.
Carbon dioxide can be used to purge an aircraft fuel tank of fuel vapors.
95.
Fuel system components must be bonded and grounded in order to
A.
drain off static charges.
B.
prevent stray currents.
C.
retard galvanic corrosion.
Aircraft fuel system components must be bonded to the aircraft structure and must be
grounded in order to prevent a buildup of static electricity.
Static electricity could cause a spark and a fire.
96.
Integral fuel tanks on transport aircraft are
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
24/28
A.
easily removed for service or inspection.
B.
constructed of plastic or fiberglass.
C.
supported by the aircraft structure.
Integral fuel tanks are actually a part of the aircraft structure in which all of the seams and
riveted joints are sealed with an appropriate sealant.
The fuel is carried in the sealed-off aircraft structure.
97.
Which of the following would give the first positive indication that a change-over from one
fuel tank to another is needed?
A.
Fuel pressure warning.
B.
Fuel pressure gauge.
C.
Fuel quantity indicator.
The fuel pressure warning system should give the first indication, by a loss of pressure,
that a fuel tank is empty. This drop in pressure warns the pilot to switch to a full tank.
98.
Which of the following may be used for the repair of fuel leaks on most integral fuel tanks?
A.
Welding and resealing.
B.
Brazing and resealing.
C.
Riveting and resealing.
Since an integral fuel tank is a part of the aircraft structure, it is repaired by riveting, and
resealing the repaired area.
99.
What unit would be adjusted to change the fuel pressure warning limits?
A.
Fuel flowmeter bypass valve.
B.
Pressure-sensitive mechanism.
C.
Fuel pressure relief valve.
The contacts on the pressure-sensitive mechanism would be adjusted to change the
pressure at which the fuel pressure warning unit actuates.
100.
How many vents, arranged so that they are not likely to become plugged at the same
time, must be used in multiengine fuel systems?
A.
Two.
B.
Four.
C.
Six.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
25/28
If a single fuel tank (or series of fuel tanks interconnected to function as a single tank) is
used on a multi-engine airplane, the tank must have at least two vents arranged to
minimize the probability of both vents becoming obstructed simultaneously.
101.
Normal fuel crossfeed system operation in multiengine aircraft
A.
calls for jettisoning of fuel overboard to correct lateral instability.
B.
reduces contamination and/or fire hazards during fueling or defueling operations.
C.
provides a means to maintain a balanced fuel load condition.
Multiengine aircraft normally have fuel tanks located in widely separated parts of the
aircraft. A crossfeed fuel system allows fuel to be used from any tank by any of the
engines. This allows a balanced fuel load to be maintained.
102.
When moving the mixture control on a normally operating engine into the idle cutoff
position, engine RPM should
A.
slightly increase before the engine starts to die.
B.
slightly decrease and then drop rapidly.
C.
remain the same until the cutoff is effected, then drop rapidly.
An engine normally uses an idling fuel-air mixture richer than that which produces the
most efficient burning.
When the mixture control is moved into the IDLE CUTOFF position, the mixture passes
through the ratio that produces the best burning. The RPM picks up a few RPMs before it
drops off completely.
103.
One advantage of electrical and electronic fuel quantity indicating systems is that
A.
the indicators are calibrated in gallons; therefore, no conversion is necessary.
B.
only one transmitter and one indicator are needed regardless of the number of tanks.
C.
several fuel tank levels can be read on one indicator.
Two important advantages of the electronic and electrical fuel quantity indicating systems
are that the indicator can be located any distance from the tanks and the fuel levels of
several tanks can be read on one indicator.
104.
Which of the following is employed to maintain lateral stability when jettisoning fuel?
A.
Two separate independent systems.
B.
Crossfeed system.
C.
Two interconnected systems.
Lateral stability during fuel jettisoning is maintained by having two separate and
independent jettisoning systems. There is one system for each side of the aircraft.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
26/28
105.
Which of the following is necessary to effectively troubleshoot a fuel pressure warning
system?
A.
The manufacturer's maintenance manuals.
B.
AC 43.13-1B, Acceptable Methods, Techniques, and Practices -- Aircraft Inspection and
Repair.
C.
A set of Federal Aviation Regulations.
The manufacturer's maintenance manuals give all the information needed to effectively
troubleshoot a fuel-pressure-warning system.
106.
Entrained water in aviation turbine fuel is a hazard because of its susceptibility to freezing
as it passes through the filters. What are common methods of preventing this hazard?
A.
Micromesh fuel strainers and fuel heater.
B.
High-velocity fuel pumps and fuel heater.
C.
Anti-icing fuel additives and fuel heater.
Turbine engine fuel may have moisture entrained in it that will condense out and freeze on
the fuel filters. This ice will shut off the flow of fuel to the engines.
To eliminate this danger, anti-icing additives may be put in the turbine fuel to lower the
freezing temperature of the water and prevent its freezing on the filters.
Most jet transport aircraft have fuel heaters, or heat exchangers, that use engine
compressor bleed air or engine oil to raise the temperature of the fuel enough that it will
not freeze on the filters.
107.
Which of the following precautions is most important during refueling operations?
A.
All outside electrical sources must be disconnected from the aircraft.
B.
Fuel to be used must be appropriately identified.
C.
All electrical switches must be in OFF position.
It is extremely important when fueling an aircraft that the fuel be properly identified. The
use of fuel with a lower than allowed octane or performance rating can cause detonation
which can destroy an engine.
A number of airplanes have been destroyed by the inadvertent fueling of a reciprocating
engine aircraft with turbine-engine fuel. Turbine-engine fuel will cause severe detonation
when a reciprocating engine is operated at takeoff power.
108.
As a general rule, which statement is true regarding fuel leaks?
A.
Stains, seeps, and heavy seeps are not flight hazards.
B.
All fuel leaks regardless of location or severity are considered a hazard to flight.
C.
Stains, seeps, and heavy seeps (in addition to running leaks), are considered flight
hazards when located in unvented areas of the aircraft.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
27/28
Any fuel leaking from an aircraft fuel tank can constitute a safety of flight situation under
certain conditions.
A stain, seep, or even a heavy seep is not considered to be a flight hazard unless it is in
an unvented area where the fumes can collect and cause a fire hazard. Any type of leak
that allows fuel vapors to accumulate must be repaired before the aircraft can be released
for flight.
109.
Why are jet fuels more susceptible to water contamination than aviation gasoline?
A.
Jet fuel has a higher viscosity than gasoline.
B.
Jet fuel is lighter than gasoline; therefore, water is more easily suspended.
C.
Condensation is greater because of the higher volatility of jet fuels.
Jet fuels have a higher viscosity than aviation gasoline. Because of this higher viscosity,
contaminants such as water remain suspended in the fuel and do not settle out into the
fuel tank sumps.
110.
Fuel-boost pumps are operated
A.
to provide a positive flow of fuel to the engine.
B.
primarily for fuel transfer.
C.
automatically from fuel pressure.
Fuel boost pumps are used to provide a positive flow of fuel from the tank to the engine.
Boost pumps are used for engine starting, as a backup for takeoff and landing, and in
many cases, to transfer fuel from one tank to another.
111.
What flight safety-related advantage does a pressure fueling system provide?
A.
Keeps the aircraft within weight and balance limitations.
B.
Reduces the chances for fuel contamination.
C.
Reduces the time required for fueling.
Pressure fueling of an aircraft reduces the chances of fuel contamination, as well as
reducing the danger of static electricity igniting fuel vapors.
112.
The presence of fuel stains around a fuel nozzle would indicate
A.
too much fuel pressure.
B.
excessive airflow across the venturi.
C.
clogged fuel nozzle.
A clogged fuel-injection nozzle will allow the fuel to escape through the air bleed holes in
the side of the nozzle.
There will be fuel stains on the cylinder head around the clogged nozzle.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
2/10/24, 10:07 AM
Prepware
https://online.prepware.com/quiz_review_graded?quiz_id=6296962
28/28
113.
How does temperature affect fuel weight?
A.
Cold fuel is heavier per gallon.
B.
Warm fuel is heavier per gallon.
C.
Temperature has no effect.
The density of aircraft fuel varies with its temperature. The colder the fuel, the more
pounds of fuel there are in a gallon. Aircraft engines use fuel on the basis of its weight
rather than its volume.
114.
Where is fuel pressure taken for the pressure warning signal on most aircraft engines?
A.
Outlet side of the boost pump.
B.
Fuel pressure line of the carburetor.
C.
Between the fuel pump and the strainer.
The fuel pressure warning signal used with most aircraft engines is taken from the fuel-
pressure line that goes to the fuel inlet of the carburetor.
© 2023 Aviation Supplies & Academics, Inc. All rights reserved. | 1-800-ASA-2FLY | Website: www.asa2fly.com
(https://www.asa2fly.com) | Email: Prepware@asa2fly.com (mailto:prepware@asa2fly.com)
10_2023 DB (v1.36
(/whats_new))
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Related Documents
Related Questions
Please give a complete solution in Handwritten format.
Strictly don't use chatgpt,I need correct answer.
Engineering dynamics
arrow_forward
Access Pearson
Mastering Engineering
Back to my courses
Course Home
Course Home
Scores
arrow_forward
University of Babylon
Collage of Engineering\Al-Musayab
Department of Automobile
Engineering
Under Grad/Third stage
Notes:
1-Attempt Four Questions.
2- Q4 Must be Answered
3-Assume any missing data.
4 تسلم الأسئلة بعد الامتحان مع الدفتر
Subject: Mechanical
Element Design I
Date: 2022\01\25
2022-2023
Time: Three Hours
Course 1
Attempt 1
Q1/ Design a thin cylindrical pressure tank (pressure vessel) with hemispherical ends to the
automotive industry, shown in figure I below. Design for an infinite life by finding the
appropriate thickness of the vessel to carry a sinusoidal pressure varied from {(-0.1) to (6) Mpa}.
The vessel is made from Stainless Steel Alloy-Type 316 sheet annealed. The operating
temperature is 80 C° and the dimeter of the cylinder is 36 cm. use a safety factor of 1.8.
Fig. 1
(15 Marks)
Q2/ Answer the following:
1- Derive the design equation for the direct evaluation of the diameter of a shaft to a desired
fatigue safety factor, if the shaft subjected to both fluctuated…
arrow_forward
Please give me the answers for this i been looking at this for a hour and my head hurts
arrow_forward
Question 2
You are a biomedical engineer working for a small orthopaedic firm that fabricates rectangular shaped fracture
fixation plates from titanium alloy (model = "Ti Fix-It") materials. A recent clinical report documents some problems with the plates
implanted into fractured limbs. Specifically, some plates have become permanently bent while patients are in rehab and doing partial
weight bearing activities.
Your boss asks you to review the technical report that was generated by the previous test engineer (whose job you now have!) and used to
verify the design. The brief report states the following... "Ti Fix-It plates were manufactured from Ti-6Al-4V (grade 5) and machined into
solid 150 mm long beams with a 4 mm thick and 15 mm wide cross section. Each Ti Fix-It plate was loaded in equilibrium in a 4-point bending
test (set-up configuration is provided in drawing below), with an applied load of 1000N. The maximum stress in this set-up was less than the
yield stress for the…
arrow_forward
est 2 (copy) (page 4 of 9)
A wiseup.wsu.acza/mod/quiz/attempt.php7attempt=610918cmid 148960&page=3
ops
O YouTube
M Gmail
Maps
O GENERAL MATHEM.
O New Tab
:WSU WiSeUp
1 MONLO GOA
ashboard / My courses / FLM15B2_KF_WS6222 2021 / Tests / Test 2 (copy)
uestion 4
Quz navigation
Gate AB in Figure below is 1.0 m long and 0.9 wide. Calculate force F on the gate and position X of its centre of
Not yet
answered
pressure.
Marked out of
Finish attempt
10,000
Rag question
3m
Oil,
s.g.=Q81
7m
1.0m
B
50
Answer
arrow_forward
Please answer the 4th question
arrow_forward
mylabmastering.pearson.com
Chapter 12 - Lecture Notes.pptx: (MAE 272-01) (SP25) DY...
P Pearson MyLab and Mastering
Scores
arrow_forward
Two sport utility vehicles (SUVs) are being considered by a recent engineering graduate. Using the following data evaluate which sport utility vehicle is better. Use six attributes in your a
point, overall appearance, comfort, safety, reliability, and fuel mileage. Larger scores on overall appearance, comfort, safety, reliability, and fuel mileage are preferred to smaller ones.
Click the icon to view the table with data you have gathered about the SUVs.
Determine attribute weights and use the nondimensional scaling technique to find the resulting set of vehicle scores. Fill in the table below. (Round to two decimal places.)
More Info
Attribute
Price
Appearance
Comfort
Safety
Reliability
Fuel mileage
Relative
Rank
4
253 6
1
Print
Final score
Alternatives
SUV 1
$27,650
4
3
3
3
22 mpg
SUV 1
Done
Alternatives
SUV 2
$21,900
3
5
4
4
18 mpg
SUV 2
-
X
arrow_forward
Instrumentation & Measurements
This homework measures your capability to design/analyze various components/variables of ameasurement system based on what you have studied.
Question is Attached in image. Thank you.
arrow_forward
I need parts 1, 2, and 3 answered pertaining to the print provided.
NOTE: If you refuse to answers all 3 parts and insist on wasting my question, then just leave it for someone else to answer. I've never had an issue until recently one single tutor just refuses to even read the instructions of the question and just denies it for a false reasons or drags on 1 part into multiple parts for no reason.
arrow_forward
Could you please explain where and what is tight side and also how to find 5-9
arrow_forward
Please do Asap
arrow_forward
00
T
R
%24
Bb R
V qa
du/webapps/assessment/take/launch.jsp?course_assessment_id%=_254968_1&course_id%3D 3565256_1&content id= 52826
* Question Completion Status:
Attach File
Browse Local Files
Browse Content Collection
QUESTION 2
A company needs to choose one supplier for a particular type of silicon wafer used'in the production of
semiconductors. The company has three options. Supplier A sells the silicon wafers for $2.50 per wafer,
independently of the number of wafers ordered. Supplier B sells the wafers for $2.40 each but does not
consider an order for less than 2,000 wafers. Supplier C sells the wafers for $2.30 each but does not accept
an order for less than 3,000 wafers. Assume an order setup cost of $100 and an annual requirement of 20,000
wafers. Assume a 20% annual interest rate for holding cost calculations.
a. Which supplier should be chosen to minimize the total annual cost for the wafers, and what is the
optimal order quantity?
b. If the replenishment lead time for wafers…
arrow_forward
Chapter 12 - Lecture Notes.pptx: (MAE 272-01) (SP25) DY...
Scores
arrow_forward
I need answers to questions 7, 8, and 9 pertaining to the print provided.
Note: A tutor keeps putting 1 question into 3 parts and wasted so many of my questions. Never had a issue before until now, please allow a different tutor to answer because I was told I am allowed 3 of these questions.
arrow_forward
Can someone please help me to answer all of the following questions thank you!!
arrow_forward
Truncation errors are increased as the round-off errors are decreased.Group of answer choices True False
Say, you have a thermometer and you are checking the temperature of a body that has a temperature of 36o Using your thermometer five times, it gives you the following measurements: 29oC, 29.2oC, 29.3oC, 28.9oC, and 29.1oC. What can we conclude about the accuracy and the precision of the thermometer?Group of answer choices The thermometer is not accurate and not precise The thermometer is faulty. The thermometer is accurate and precise The thermometer is not accurate but precise.
Say, you have a thermometer and you are checking the temperature of a body that has a temperature of 36o Using your thermometer five times, it gives you the following measurements: 36oC, 35.6oC, 36oC, 37oC, and 36.2oC. What can we conclude about the accuracy and the precision of the thermometer?Group of answer choices The thermometer is accurate and precise. The thermometer is accurate but not precise. The…
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Related Questions
- Please give a complete solution in Handwritten format. Strictly don't use chatgpt,I need correct answer. Engineering dynamicsarrow_forwardAccess Pearson Mastering Engineering Back to my courses Course Home Course Home Scoresarrow_forwardUniversity of Babylon Collage of Engineering\Al-Musayab Department of Automobile Engineering Under Grad/Third stage Notes: 1-Attempt Four Questions. 2- Q4 Must be Answered 3-Assume any missing data. 4 تسلم الأسئلة بعد الامتحان مع الدفتر Subject: Mechanical Element Design I Date: 2022\01\25 2022-2023 Time: Three Hours Course 1 Attempt 1 Q1/ Design a thin cylindrical pressure tank (pressure vessel) with hemispherical ends to the automotive industry, shown in figure I below. Design for an infinite life by finding the appropriate thickness of the vessel to carry a sinusoidal pressure varied from {(-0.1) to (6) Mpa}. The vessel is made from Stainless Steel Alloy-Type 316 sheet annealed. The operating temperature is 80 C° and the dimeter of the cylinder is 36 cm. use a safety factor of 1.8. Fig. 1 (15 Marks) Q2/ Answer the following: 1- Derive the design equation for the direct evaluation of the diameter of a shaft to a desired fatigue safety factor, if the shaft subjected to both fluctuated…arrow_forward
- Please give me the answers for this i been looking at this for a hour and my head hurtsarrow_forwardQuestion 2 You are a biomedical engineer working for a small orthopaedic firm that fabricates rectangular shaped fracture fixation plates from titanium alloy (model = "Ti Fix-It") materials. A recent clinical report documents some problems with the plates implanted into fractured limbs. Specifically, some plates have become permanently bent while patients are in rehab and doing partial weight bearing activities. Your boss asks you to review the technical report that was generated by the previous test engineer (whose job you now have!) and used to verify the design. The brief report states the following... "Ti Fix-It plates were manufactured from Ti-6Al-4V (grade 5) and machined into solid 150 mm long beams with a 4 mm thick and 15 mm wide cross section. Each Ti Fix-It plate was loaded in equilibrium in a 4-point bending test (set-up configuration is provided in drawing below), with an applied load of 1000N. The maximum stress in this set-up was less than the yield stress for the…arrow_forwardest 2 (copy) (page 4 of 9) A wiseup.wsu.acza/mod/quiz/attempt.php7attempt=610918cmid 148960&page=3 ops O YouTube M Gmail Maps O GENERAL MATHEM. O New Tab :WSU WiSeUp 1 MONLO GOA ashboard / My courses / FLM15B2_KF_WS6222 2021 / Tests / Test 2 (copy) uestion 4 Quz navigation Gate AB in Figure below is 1.0 m long and 0.9 wide. Calculate force F on the gate and position X of its centre of Not yet answered pressure. Marked out of Finish attempt 10,000 Rag question 3m Oil, s.g.=Q81 7m 1.0m B 50 Answerarrow_forward
- Please answer the 4th questionarrow_forwardmylabmastering.pearson.com Chapter 12 - Lecture Notes.pptx: (MAE 272-01) (SP25) DY... P Pearson MyLab and Mastering Scoresarrow_forwardTwo sport utility vehicles (SUVs) are being considered by a recent engineering graduate. Using the following data evaluate which sport utility vehicle is better. Use six attributes in your a point, overall appearance, comfort, safety, reliability, and fuel mileage. Larger scores on overall appearance, comfort, safety, reliability, and fuel mileage are preferred to smaller ones. Click the icon to view the table with data you have gathered about the SUVs. Determine attribute weights and use the nondimensional scaling technique to find the resulting set of vehicle scores. Fill in the table below. (Round to two decimal places.) More Info Attribute Price Appearance Comfort Safety Reliability Fuel mileage Relative Rank 4 253 6 1 Print Final score Alternatives SUV 1 $27,650 4 3 3 3 22 mpg SUV 1 Done Alternatives SUV 2 $21,900 3 5 4 4 18 mpg SUV 2 - Xarrow_forwardInstrumentation & Measurements This homework measures your capability to design/analyze various components/variables of ameasurement system based on what you have studied. Question is Attached in image. Thank you.arrow_forwardI need parts 1, 2, and 3 answered pertaining to the print provided. NOTE: If you refuse to answers all 3 parts and insist on wasting my question, then just leave it for someone else to answer. I've never had an issue until recently one single tutor just refuses to even read the instructions of the question and just denies it for a false reasons or drags on 1 part into multiple parts for no reason.arrow_forwardCould you please explain where and what is tight side and also how to find 5-9arrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY