Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

11. 

The __________ point of ammonia is -77.7°C.

A. freezing
B. boiling

Answer: Option A

Explanation:

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12. 

Sulphur dioxide has the lowest boiling point.

A. Yes
B. No

Answer: Option B

Explanation:

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13. 

For a given dry bulb temperature, as the relative humidity __________ the wet bulb temperature will increase.

A. increases
B. decreases

Answer: Option B

Explanation:

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14. 

The lowest thermal diffusivity is of

A. iron
B. lead
C. aluminium
D. rubber

Answer: Option D

Explanation:

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15. 

A low wet bulb temperature indicates very __________ humidity.

A. low
B. high

Answer: Option A

Explanation:

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