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Heat Transfer, Refrigeration and Air Conditioning

Answer: C

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62.

The wet bulb temperature at 100% relative humidity is __________ dew point temperature.

Answer: A

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63.

The automobile radiator is a heat exchanger of

Answer: C

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64.

The process of removing moisture from the air, without change in its dry bulb temperature, is called dehumidification.

Answer: A

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65.

During humidification process, __________ increases.

Answer: B

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Answer: A

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67.

A water cooled condenser operates at a __________ condensing temperature than an air-cooled condenser.

Answer: B

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68.

Two long parallel surfaces each of emissivity 0.7 are maintained at different temperatures and accordingly have radiation heat exchange between them. It is desired to reduce 75% of the radiant heat transfer by inserting thin parallel shields of emissivity 1 on both sides. The number of shields should be

Answer: C

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69.

The heat transfer by conduction through a thick sphere is same as through a thick cylinder.

Answer: B

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70.

The sensible heat gain is due to the __________ difference between the fresh air and the air in space.

Answer: A

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