Q. The evaporator changes the low pressure liquid refrigerant from the expansion valve into

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Q. For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is

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Q. In case ofsensible cooling of air, the coil efficiency is given by

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Q. The cooling system used for supersonic aircrafts and rockets is

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Q. Which of the following statement is correct?

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Q. The desirable property of a refrigerant is

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Q. The humidification process, on the psychrometric chart is shown by

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Q. The colour of the flame of halide torch, in case of leakage of freon refrigerant, will change to

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Q. The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

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Q. The transfer of heat by molecular collision is smallest in

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Q. During dehumidification process, the relative humidity

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Q. The space between the two walls of a thermos flask is evacuated because vacuum is a __________ conductor of heat.

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Q. The ratio of actual heat transfer to the maximum possible heat transfer is known as heat exchanger effectiveness.

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Q. The mass of water vapour present in 1 kg of dry air, is called humidity ratio.

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Q. In a vapour compression refrigeration system, a throttle valve is used in place of an expander because

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Q. The unit of overall coefficient of heat transfer is

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Q. Most thermostatic expansion valves are set for a superheat of

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Q. For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

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Q. Air refrigerator works on

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Q. The reciprocating refrigerant compressors are very suitable for

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