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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.

Condenser
Expansion valve
Compressor
Evaporator

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Refrigeration and Air Conditioning
The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

Normal cooling
Sub-cooling or under-cooling
None of the listed here
Super-cooling

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Refrigeration and Air Conditioning
In which of the following refrigeration system, waste heat can be effectively used?

Vapour absorption cycle
None of the listed here
Air refrigeration cycle
Vapour compression cycle

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Refrigeration and Air Conditioning
A valve which maintains a constant degree of superheat at the end of the evaporator coil, is called

Low side float valve
Automatic expansion valve
Thermostatic expansion valve
High side float valve

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

Sulphur sticks
All of these
Soap and water
Halide torch

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

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