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Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

Exercise : Heat Transfer, Refrigeration and Air Conditioning - Section 1
6.
The humidity ratio or specific humidity is the mass of water vapour present in
1 m3 of wet air
1 m3 of dry air
1 kg of wet air
1 kg of dry air
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
The formation of frost on cooling coils in a refrigerator
increases heat transfer
improves C.O.P. of the system
increases power consumption
reduces power consumption
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
The by-pass factor for a cooling coil
increases with increase in velocity of air passing through it
decreases with increase in velocity of air passing through it
remains unchanged with increase in velocity of air passing through it
may increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
The difference between dry bulb temperature and wet bulb temperature, is called
dry bulb depression
wet bulb depression
dew point depression
degree of saturation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
Defrosting of a refrigerator may be done by stopping the compressor for a short period.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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