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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Optimum
Any value
High
Low

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Refrigeration and Air Conditioning
Air refrigeration cycle is used in

Commercial refrigerators
Gas liquefaction
Domestic refrigerators
Air conditioning

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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)

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

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

All of these
Soap and water
Halide torch
Sulphur sticks

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Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

cooling below 0°C
quiet operation
very little power consumption
noisy operation

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Joule cycle
Reversed Brayton cycle
Reversed Carnot cycle
Reversed Otto cycle

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MORE MCQ ON Refrigeration and Air Conditioning

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