REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
8th Edition
ISBN: 9781337370042
Author: TOMCZYK
Publisher: CENGAGE L
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Textbook Question
Chapter 39, Problem 3RQ
Name four nationally recognized energy certificationsfor home auditors and contractors.
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If the rods are made from a square section with the dimension as shown. Calculate the load
that will make point A move to the left by 6mm, E=228GPa.
2P-
P
A
80mm
B
200mm
2P
0.9m
1.3m
3.
9.
10.
The centrifugal tension in belts
(a) increases power transmitted
(b) decreases power transmitted
(c) have no effect on the power transmitted
(d) increases power transmitted upto a certain speed and then decreases
When the belt is stationary, it is subjected to some tension, known as initial tension. The value of this
tension is equal to the
(a) tension in the tight side of the belt
(b) tension in the slack side of the belt
(c) sum of the tensions in the tight side and slack side of the belt
(d) average tension of the tight side and slack side of the belt
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (d) is given by
60°
(a) p=d sin
(c) p=d sin
(120°
T
where T Number of teeth on the sprocket.
90°
(b) p=d sin
T
180°
(d) p=d sin
T
OBJECTIVE TYPE QUESTIONS
1.
The maximum fluctuation of energy is the
2.
(a) sum of maximum and minimum energies
(b) difference between the maximum and minimum energies
(c) ratio of the maximum energy and minimum energy
(d) ratio of the mean resisting torque to the work done per cycle
In a turning moment diagram, the variations of energy above and below the mean resisting torque line
is called
(a) fluctuation of energy
(b) maximum fluctuation of energy
(c) coefficient of fluctuation of energy
(d) none of the above
Chapter 16: Turning Moment Diagrams and Flywheel 611
The ratio of the maximum fluctuation of speed to the mean speed is called
3.
(a) fluctuation of speed
(c) coefficient of fluctuation of speed
4.
(b) maximum fluctuation of speed
(a) none of these
The ratio of the maximum fluctuation of energy to the.......... is called coefficient of fluctuation of
energy.
(a) minimum fluctuation of energy
(b) work done per cycle
The maximum fluctuation of energy in a flywheel is equal to
5.…
Chapter 39 Solutions
REFRIGERATION+AIR COND.TECH.-W/2 ACCESS
Ch. 39 - Define a residential energy audit.Ch. 39 - Name and briefly explain the three broad...Ch. 39 - Name four nationally recognized energy...Ch. 39 - Performing a home energy audit starts with a...Ch. 39 - Name seven base loads, or LAMEL loads, as they...Ch. 39 - Name and briefly explain the five most common...Ch. 39 - One Pascal (Pa) is equal to how many inches of...Ch. 39 - One inch of water column (in. WC) is equal to how...Ch. 39 - Briefly describe a blower door test.Ch. 39 - What can an infrared scanning camera do for an...
Ch. 39 - Briefly describe what a duct blower's function is...Ch. 39 - Briefly describe how to check for duct leakage to...Ch. 39 - Briefly describe and write the equation for...Ch. 39 - Briefly describe and write the equation for...Ch. 39 - When performing a combustion efficiency test,...Ch. 39 - Briefly define draft as it applies to a combustion...Ch. 39 - Briefly define backdrafting as it applies to a...Ch. 39 - Briefly define spillage as it applies to a...Ch. 39 - Name four causes for backdrafting....Ch. 39 - What will a cracked heat exchanger cause in a...Ch. 39 - What is the function of flame safeguard controls?Ch. 39 - Name three common flame safeguard controls. _____,...Ch. 39 - Define primary air as it applies to a combustion...Ch. 39 - Define secondary air as it applies to a combustion...Ch. 39 - Define dilution air as it applies to a combustion...Ch. 39 - Define excess air as it applies to a combustion...Ch. 39 - What is the difference between an induced-draft...Ch. 39 - What is the difference between over-the-fire draft...Ch. 39 - What is meant by a direct-vented,...Ch. 39 - What is meant by an energy conservation measure...Ch. 39 - What is the difference between a base load and...Ch. 39 - Define a home energy index.
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