Exercise: Heat Transfer Refrigeration And Air Conditioning

Questions for: Heat Transfer Refrigeration And Air Conditioning

The heat transfer by conduction through a thick sphere is given by
A:
B:
C:
D:
Answer: B
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According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour)
A:
Pb = pa - pv
B:
Pb = pa + pv
C:
Pb = pa x pv
D:
Pb = pa/pv
Answer: B
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Defrosting of a refrigerator may be done by stopping the compressor for a short period.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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The difference between dry bulb temperature and wet bulb temperature, is called
A:
dry bulb depression
B:
wet bulb depression
C:
dew point depression
D:
degree of saturation
Answer: B
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The by-pass factor for a cooling coil
A:
increases with increase in velocity of air passing through it
B:
decreases with increase in velocity of air passing through it
C:
remains unchanged with increase in velocity of air passing through it
D:
may increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering
Answer: A
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