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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Centrifugal
Screw
Reciprocating
Rotating

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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

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

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Improves C.O.P. of the system
Increases heat transfer
Increases power consumption
Reduces power consumption

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Carnot cycle
Reversed Otto cycle
Reversed Joule cycle
Reversed Rankine cycle

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Refrigeration and Air Conditioning
In aqua ammonia absorption refrigeration system, incomplete rectification leads to accumulation of water in

Absorber
Evaporator
None of these
Condenser

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Decreases
None of these
Increases
Remains constant

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