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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Evaporator
Compressor
Condenser
Expansion valve

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Refrigeration and Air Conditioning
Air conditioning means

Dehumidifying
All of these
Cooling
Heating

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Refrigeration and Air Conditioning
The cooling system used for supersonic aircrafts and rockets is

Regenerative air cooling system
Simple air cooling system
Bootstrap air cooling system
Reduced ambient air cooling system

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Refrigeration and Air Conditioning
The central air conditioning system has ___________ overall efficiency as compared to individual systems.

Lower
Same
Higher
None of these

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Carbon dioxide
Sulphur dioxide
Ammonia
R-12

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Refrigeration and Air Conditioning
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

(
O.P)R - 1
O.P.)P = (
O.P)R
O.P)P = (
O.P.)R + 1
(
O.P)P = (
(
O.P.)P = (
(
O.P.)R + 2

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MORE MCQ ON Refrigeration and Air Conditioning

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