Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

221) The unit of overall coefficient of heat transfer is

Answer is:

W/m²K

222) Most thermostatic expansion valves are set for a superheat of

Answer is:

5 Degree Centigrade

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

Answer is:

centrifugal

224) 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

Answer is:

relative humidity

225) The transfer of heat by molecular collision is smallest in

Answer is:

gases

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