2.7 Aircraft Systems Quiz_ ASCI 121 Private Pilot Operations - Mar 2024 - Online

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3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 1/7 Due Mar 31 at 11:59pm Points 100 Questions 25 Time Limit 50 Minutes Instructions Attempt History Attempt Time Score LATEST Attempt 1 35 minutes 96 out of 100  Correct answers are hidden. Score for this quiz: 96 out of 100 Submitted Mar 31 at 5:50pm This attempt took 35 minutes.  IncorrectQuestion 1 0 / 4 pts gyroscopic forces applied to the rotating propeller blades acting 90° in advance of the point the force was applied. clockwise rotation of the engine and the propeller turning the airplane counter-clockwise. 2.7 Aircraft Systems Quiz Instructions: This quiz can only be taken once . Answer the 25 multiple choice questions in the time provided. Before you begin, make sure you have downloaded the FAA Airman Knowledge Testing Supplement Document (PDF) (https://www.faa.gov/training_testing/testing/supplements/media/sport_rec_private_akts.pdf) and are familiar with navigating its contents, as some of the quiz questions will reference its figures. Any reference to a figure in the quiz can be found in the Supplement Document. Time limit: There is a 50-minute limit and at the end of 50 minutes, the exam will close and be automatically submitted for grading. You will get a notification pop-up approximately 10 seconds before time expires. If you leave the exam for any reason, the timer will continue and the exam will automatically submit when time is up. If you lose your Internet connection, you may reconnect and return to the exam where you left off as long as time has not expired. If you encounter technical difficulties, please contact your instructor. Grading: You will see scores for multiple-choice questions right away. Please contact your instructor if you have any questions. The left turning tendency of an airplane caused by P-factor is the result of the

3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 2/7 propeller blade descending on the right, producing more thrust than the ascending blade on the left. The downward-moving blade on the right side of the propeller has a higher angle of attack and greater action and reaction than the upward moving blade on the left. This results in a tendency for the airplane to yaw around the vertical axis to the left.  Question 2 4 / 4 pts quickly check the fuel supply for possible fuel exhaustion. immediately establish the proper gliding attitude and airspeed. determine the wind direction to plan for the forced landing. Maintaining the proper glide speed (safe airspeed) is the most important rule to remember in the event of a power failure.  Question 3 4 / 4 pts the mixture set too rich. too much power and with the mixture set too lean. higher-than-normal oil pressure. Excessively high engine temperatures can result from insufficient cooling caused by too lean a mixture, too low a grade of fuel, low oil, or insufficient airflow over the engine.  Question 4 4 / 4 pts pre-ignition. detonation. combustion. Preignition is defined as ignition of the fuel prior to normal ignition.  Question 5 4 / 4 pts be at the controls in the cockpit. be in the cockpit and call out all commands. call 'contact' before touching the propeller. Because of the hazards involved in hand-starting airplane engines, it is extremely important that a competent pilot be at the controls in the cockpit and that all communications and procedures be agreed upon and rehearsed beforehand.  The most important rule to remember in the event of a power failure after becoming airborne is to If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been operating with The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as Should it become necessary to handprop an airplane engine, it is extremely important that a competent pilot

3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 3/7 Question 6 4 / 4 pts When at high airspeeds. When at high angles of attack. When at low angles of attack. The effects of P-factor, or asymmetric propeller loading, usually occur when the airplane is flown at high angles of attack (or a high deck angle for a PPC) and at high power settings.  Question 7 4 / 4 pts prevent expansion of the fuel by eliminating airspace in the tanks. prevent moisture condensation by eliminating airspace in the tanks. force any existing water to the top of the tank away from the fuel lines to the engine. Water in the fuel system is dangerous and the pilot must prevent contamination. The fuel tanks should be filled after each flight, or at least after the last flight of the day. This will prevent moisture condensation within the tank, since no air space will be left inside.  Question 8 4 / 4 pts Enrichen the fuel mixture. Increase the RPM. Reduce the airspeed. To avoid excessive cylinder head temperatures, a pilot can open the cowl flaps, increase airspeed, enrich the mixture, or reduce power. Any of these procedures will aid in reducing the engine temperature.  Question 9 4 / 4 pts 20° C and high relative humidity. 100° F and visible moisture. 75° F and low relative humidity. If the temperature is between -7°C (20°F) and 21°C (70°F), with visible moisture or high humidity, the pilot should constantly be on the alert for carburetor ice.  Question 10 4 / 4 pts high as 70°F and the relative humidity is high. high as 95°F and there is visible moisture. When does P-factor cause the airplane to yaw to the left? Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will What is one procedure to aid in cooling an engine that is overheating? Carburetor icing can occur with an OAT as high as The possibility of carburetor icing exists even when the ambient air temperature is as

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3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 4/7 low as 0°F and the relative humidity is high. If the temperature is between -7°C (20°F) and 21°C (70°F) with visible moisture or high humidity, the pilot should be constantly on the alert for carburetor ice.  Question 11 4 / 4 pts Test each brake and the parking brake. Place the magneto or ignition switch momentarily in the OFF position to check for proper grounding. Adjust for proper RPM and check for desired indications on the engine gauges. As soon as the engine starts, check for unintentional movement of the aircraft and set power to the recommended warm-up RPM. The oil pressure should then be checked to determine that the oil system is functioning properly with pressure at recommended levels within the manufacturer's time limit.  Question 12 4 / 4 pts decrease the amount of fuel in the mixture in order to compensate for increased air density. increase the amount of fuel in the mixture to compensate for the decrease in pressure and density of the air. decrease the fuel flow in order to compensate for decreased air density. The mixture becomes richer as the airplane gains altitude, because the carburetor meters the same amount of fuel as at sea level. Leaning the mixture control prevents this by decreasing the rate of fuel discharge to compensate for the decrease in air density.  Question 13 4 / 4 pts Taxi back to the flight line for a maintenance check. Check the results obtained with a leaner setting of the mixture. Reduce manifold pressure to control detonation. When carburetor heat is applied, the air/fuel mixture of an engine will be enriched because any given volume of hot air is less dense than cold air of the same volume. This condition would be aggravated at high altitude where, because of decreased air density, the mixture is already richer than at sea level.  Question 14 4 / 4 pts They are relatively simple and inexpensive to operate. Better distribution of heat. To preserve cylinder head duration and maintain lower temperatures. Most training aircraft use reciprocating engines because they are relatively simple and inexpensive to operate. What should be the first action after starting an aircraft engine? The basic purpose of adjusting the fuel/air mixture at altitude is to During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check. Under these circumstances, what would be the most logical initial action? What is one purpose for using reciprocating engines?

3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 5/7  Question 15 4 / 4 pts The fuel/air mixture may become excessively lean. There will be more fuel in the cylinders than is needed for normal combustion, and the excess fuel will absorb heat and cool the engine. The excessively rich mixture will create higher cylinder head temperatures and may cause detonation. Air density increases in the descent, but the amount of fuel drawn into the carburetor remains the same. To re-establish a balanced fuel/air mixture in a descent, the mixture control must be adjusted toward 'rich.'  Question 16 4 / 4 pts All the time to aid the engine-driven fuel pump. Constantly except in starting the engine. In the event engine-driven fuel pump fails. Two fuel pump systems are used on most airplanes. The main pump system is engine driven and an auxiliary electric driven pump is provided for use in the event the engine pump fails. The auxiliary pump, commonly known as the 'boost pump,' provides added reliability to the fuel system, and is also used as an aid in engine starting. The electric auxiliary pump is controlled by a switch in the cockpit.  Question 17 4 / 4 pts lower the nose slightly to increase airspeed. lean the mixture. apply carburetor heat. To prevent detonation, the pilot should use the correct grade of fuel, maintain a sufficiently rich mixture, open the throttle smoothly, and keep the temperature of the engine within recommended operating limits. Some aircraft have an automatically enriched mixture for enhanced cooling in takeoff and climb-out at full throttle. Lowering the nose will allow the aircraft to gain airspeed, which eventually lowers the engine temperature.  Question 18 4 / 4 pts the fuel mixture ignites instantaneously instead of burning progressively and evenly. an excessively rich fuel mixture causes an explosive gain in power. the fuel mixture is ignited too early by hot carbon deposits in the cylinder. Detonation or knock is a sudden explosion or shock to a small area of the piston top, rather than the normal smooth burn in the combustion chamber. While cruising at 9,500 feet MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 feet MSL is made without readjusting the mixture? On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used? If a pilot suspects that the engine (with a fixed-pitch propeller) is detonating during climb-out after takeoff, the initial corrective action to take would be to Detonation may occur at high-power settings when

3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 6/7  Question 19 4 / 4 pts The next lower octane aviation gas. Unleaded automotive gas of the same octane rating. The next higher octane aviation gas. If the proper grade of fuel is not available, it is possible (but not desirable), to use the next higher (aviation) grade as a substitute.  Question 20 4 / 4 pts enrich the fuel/air mixture. not affect the fuel/air mixture. result in more air going through the carburetor. Carburetors are normally calibrated at sea level pressure to meter the correct fuel/air mixture. As altitude increases, air density decreases and the amount of fuel is too great for the amount of air -- the mixture is 'too rich.' This same result may be brought about by the application of carburetor heat. The heated air entering the carburetor has less density than unheated air and the fuel/air mixture is enriched.  Question 21 4 / 4 pts not appreciably affect an aircraft engine. cause damage to heat-conducting hoses and warping of the cylinder cooling fins. cause loss of power, excessive oil consumption, and possible permanent internal engine damage. Operating an engine at a higher temperature than it was designed for will cause loss of power, excessive oil consumption, and detonation. It will also lead to serious permanent injury to the engine including scoring of cylinder walls, damage to pistons and rings, and burning and warping of valves.  Question 22 4 / 4 pts Quick walk around with a check of gas and oil. Thorough and systematic means recommended by the manufacturer. Any sequence as determined by the pilot-in-command. The preflight inspection should be a thorough and systematic means by which the pilot determines that the airplane is ready for safe flight. Most Aircraft Flight Manuals or Pilot's Operating Handbooks contain a section devoted to a systematic method of performing a preflight inspection that should be used by the pilot for guidance.  Question 23 4 / 4 pts What type fuel can be substituted for an aircraft if the recommended octane is not available? Applying carburetor heat will Excessively high engine temperatures will How should an aircraft preflight inspection be accomplished for the first flight of the day? One purpose of the dual ignition system on an aircraft engine is to provide for

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3/31/24, 2:51 PM 2.7 Aircraft Systems Quiz: ASCI 121 Private Pilot Operations - Mar 2024 - Online https://erau.instructure.com/courses/170679/quizzes/599634 7/7 balanced cylinder head pressure. improved engine performance. uniform heat distribution. The dual ignition system has two magnetos to supply the electrical current to two spark plugs for each combustion chamber. This provides both a redundancy of ignition and an improvement of engine performance.  Question 24 4 / 4 pts Temperature between 20 and 70°F and high humidity. Any temperature below freezing and a relative humidity of less than 50 percent. Temperature between 32 and 50°F and low humidity. If the temperature is between -7°C (20°F) and 21°C (70°F) with visible moisture or high humidity, the pilot should be constantly on the alert for carburetor ice.  Question 25 4 / 4 pts Permits the pilot to select and maintain a desired cruising speed. Permits the pilot to select the blade angle for the most efficient performance. Provides a smoother operation with stable RPM and eliminates vibrations. A constant-speed propeller permits the pilot to select the blade angle that will result in the most efficient performance for a particular flight condition. A low blade angle allows higher RPM and horsepower, desirable for takeoffs. An intermediate position can be used for subsequent climb. After airspeed is attained during cruising flight, the propeller blade may be changed to a higher angle for lower RPM, reduced engine noise, generally lower vibration, and greater fuel efficiency. Quiz Score: 96 out of 100 Which condition is most favorable to the development of carburetor icing? What is an advantage of a constant-speed propeller?