Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

1.
The centrifugal compressors are generally used for refrigerants that require
small displacements and low condensing pressures
large displacements and high condensing pressures
small displacements and high condensing pressures
large displacements and low condensing pressures
Answer: Option
Explanation:
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2.
The water, alcohol and ammonia have same refrigerating effect at different altitudes.
Yes
No
Answer: Option
Explanation:
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3.
The automobile radiator is a heat exchanger of
parallel flow type
counter flow type
cross flow type
regenerator type
Answer: Option
Explanation:
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4.
In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.
True
False
Answer: Option
Explanation:
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5.
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be
1 kW
2 kW
3 kW
4 kW
Answer: Option
Explanation:
No answer description is available. Let's discuss.