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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

Slightly above atmospheric pressure
24 bars
Atmospheric pressure
56 bars

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Refrigeration and Air Conditioning
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will

Decrease
Remain unaffected
May increase or decrease depending on the type of refrigerant used
Increase

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Refrigeration and Air Conditioning
The pressure at the outlet of a refrigerant compressor is called

Discharge pressure
Critical pressure
Back pressure
Suction pressure

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Refrigeration and Air Conditioning
The relative humidity lines on a psychrometric chart are

Horizontal and non-uniformly spaced
Horizontal and uniformly spaced
Curved lines
Vertical and uniformly spaced

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

8 bar
15 bar
30 bar
2 bar

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Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Bell Coleman
Carnot
Ericson
Stirling

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