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Refrigeration and Air Conditioning

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

Expansion valve
Compressor
Evaporator
Condenser

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

3.72 kW
18.6 kW
1.86 kW
7.44 kW

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Single fluid
Three fluids
None of the listed here
Two fluids

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Aluminium
Steel
Brass
Copper

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Refrigeration and Air Conditioning
The dry bulb temperature lines, on the psychrometric chart are

Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced
Curved lines

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Refrigeration and Air Conditioning
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents

Condensation of the refrigerant vapour
Evaporation of the refrigerant liquid
Compression of the refrigerant vapour
Metering of the refrigerant liquid

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