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Refrigeration and Air Conditioning

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
Condenser
Expansion valve

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will remain unaffected
Will be lower
Will be higher
May be higher or lower depending upon the nature of non-condensable gases

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Ammonia vapour is driven out of solution
Lithium bromide mixes with ammonia
Ammonia vapour goes into solution
Weak solution mixes with strong solution

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Refrigeration and Air Conditioning
The wet bulb depression indicates _________ humidity of the air.

Specific
None of these
Absolute
Relative

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 + (1/C.O.P)
1 - C.O.P.
1 - (1/C.O.P)
1 + C.O.P

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Wet vapour region
None of the listed here
Sub-cooled liquid region
Superheated vapour region

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