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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

Water coolers
All of these
Room air conditioners
Domestic refrigerators

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Expansion valve
Evaporator
Condenser
Compressor

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Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Saturated liquid
Wet vapour
Dry saturated vapour
Superheated vapour

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

20°C
15°C
5°C
10°C

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

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

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Refrigeration and Air Conditioning
Ammonia is

Toxic and non-inflammable
Non-toxic
Non-inflammable
Highly toxic and inflammable

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MORE MCQ ON Refrigeration and Air Conditioning

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