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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

None of these
20 to 50°C
70 to 110°C
50 to 70°C

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Refrigeration and Air Conditioning
In order to collect liquid refrigerant and to prevent it from going to a ________, a device known as accumulator is used at the suction of compressor.

Compressor
Evaporator
Expansion valve
Condenser

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid

After passing through the condenser
Before entering the expansion valve
Before passing through the condenser
After passing through the expansion or throttle valve

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Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature

Between compressor and condenser
Before expansion valve
In evaporator
Between condenser and evaporator

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Refrigeration and Air Conditioning
The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

(h1 - h2)/ (hA - h2)
(hA - h1)/ (h2 - h1)
(h2 - hA)/ (h1 - h2)
(hA - h2)/ (h1 - h2)

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Refrigeration and Air Conditioning
In a refrigerating machine, heat rejected is _________ heat absorbed.

None of these
Less than
Greater than
Equal to

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