Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The temperature rise, between the condenser outlet and expansion valve in ammonia vapour compression system, should be as low as possible.
A:
Yes
B:
No
C:
D:
Answer: A
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A thermostatic expansion valve in a refrigeration system
A:
ensures the evaporator completely filled with refrigerant of the load
B:
is suitable only for constant load systems
C:
maintains different temperatures in evaporator in proportion to load
D:
none of the above
Answer: A
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The heat is transferred by conduction, convection and radiation in
A:
melting of ice
B:
boiler furnaces
C:
condensation of steam in condenser
D:
none of these
Answer: B
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The heat transfer by conduction through a thick cylinder(Q) is given by (where T1 = Higher temperature, T2 = Lower temperature, r1 = Inside radius, r2 = Outside radius, l = Length of cylinder, and k = Thermal conductivity)
A:
B:
C:
D:
Answer: A
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The inclined and non-uniformly spaced straight lines on a psychrometric chart indicates wet bulb temperature.
A:
Agree
B:
Disagree
C:
D:
Answer: A
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