Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The pressure at the outlet of a refrigerant compressor is called
A:
suction pressure
B:
discharge pressure
C:
critical pressure
D:
back pressure
Answer: B
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The dry bulb temperature lines, on the psychrometric chart are
A:
vertical and uniformly spaced
B:
horizontal and uniformly spaced
C:
horizontal and non-uniformly spaced
D:
curved lines
Answer: A
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The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)
A:
25°C DBT and 100% RH
B:
20°C DBT and 80% RH
C:
22°C DBT and 60% RH
D:
25°C DBT and 40% RH
Answer: C
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The unit of thermal diffusivity is
A:
m/hK
B:
m/h
C:
m2/h
D:
m2/hK
Answer: C
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The refrigerant supplied to a compressor must be
A:
superheated vapour refrigerant
B:
dry saturated liquid refrigerant
C:
a mixture of liquid and vapour refrigerant
D:
none of these
Answer: A
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