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ME Set-1
Heat Transfer Refrigeration and Air Conditioning
220

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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

it considerably reduces mass of the system

it improves the C.O.P., as the condenser is small

the positive work in isentropic expansion of liquid is very small

it leads to significant cost reduction

Answer is:

the positive work in isentropic expansion of liquid is very small

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

221) The unit of overall coefficient of heat transfer is

W/m²K

W/m²

W/mK

W/m

Answer is:

W/m²K

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

5 Degree Centigrade

10 Degree Centigrade

15 Degree Centigrade

20 Degree Centigrade

Answer is:

5 Degree Centigrade

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

reciprocating

rotating

centrifugal

screw

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

humidity ratio

relative humidity

absolute humidity

degree of saturation

Answer is:

relative humidity

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

For more MCQ's Click Here

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

the positive work in isentropic expansion of liquid is very small

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

221) The unit of overall coefficient of heat transfer is

W/m2K

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

5 Degree Centigrade

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

relative humidity

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

W/m²K