Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

6. 

The curved lines on a psychrometric chart indicates

A. dry bulb temperature
B. wet bulb temperature
C. dew point temperature
D. relative humidity

Answer: Option D

Explanation:

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7. 

During humidification process, __________ increases.

A. wet bulb temperature
B. relative humidity
C. dry bulb temperature
D. specific humidity

Answer: Option B

Explanation:

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8. 

A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

A. lack of cooling water
B. water temperature being high
C. dirty condenser surface
D. all of these

Answer: Option D

Explanation:

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9. 

The counter-current flow heat exchanger can transfer __________ heat than parallel flow heat exchanger.

A. less
B. more

Answer: Option B

Explanation:

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10. 

The freon group of refrigerants are

A. halo-carbon refrigerants
B. azeotrope refrigerants
C. inorganic refrigerants
D. hydro-carbon refrigerants

Answer: Option A

Explanation:

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