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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

None of these
Lower than
Higher than
Same as

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Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Receiver
Compressor discharge
Expansion valve
Evaporator

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Refrigeration and Air Conditioning
Which of the following refrigerants has lowest freezing point?

Freon-12
NH3
CO2
Freon-22

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Superheated vapour
Saturated liquid
Dry saturated vapour
Wet vapour

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Bright green
Red
Orange
Yellow

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Refrigeration and Air Conditioning
The C.O.P. of a heat pump working on a reversed Carnot cycle is

(T₂ - T₁)/T₁
T₁/(T₂ - T₁)
T₂/(T₂ - T₁)
(T₁ - T₂)/T₁

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