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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.5
0.75
0.25
0.1

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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
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Relative humidity
Absolute humidity
Humidity ratio
Degree of saturation

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Refrigeration and Air Conditioning
Pressure of water vapour is given by

μ/[1 - (1 - μ) (Ps/Pb)]
0.622 Pv/ (Pb - Pv)
None of these
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]

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Refrigeration and Air Conditioning
In vapour compression cycle the condition off refrigerant is dry saturated vapour

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

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

High
Small
Equal
Anything

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MORE MCQ ON Refrigeration and Air Conditioning

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