Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

41.
During a refrigeration cycle, heat is rejected by the refrigerant in a
compressor
condenser
evaporator
expansion valve
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
A refrigeration system
removes heat from a low temperature body and delivers it to a high temperature body
removes heat from a high temperature body and delivers it to a low temperature body
rejects energy to a low temperature body
none of the above
Answer: Option
Explanation:
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43.
The subcooling in a refrigeration cycle
does not alter C.O.P.
increases C.O.P.
decreases C.O.P.
none of these
Answer: Option
Explanation:
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44.
Nusselt number (NN) is given by
Answer: Option
Explanation:
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45.
During sensible cooling of air __________ decreases.
wet bulb temperature
relative humidity
dry bulb temperature
specific humidity
Answer: Option
Explanation:
No answer description is available. Let's discuss.