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Refrigeration and Air Conditioning

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

All of these
Sulphur sticks
Soap and water
Halide torch

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Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Miniature sealed unit
Axial
Piston type reciprocating
Centrifugal

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-77.7°C
-10.5°C
-33.3°C
-30°C

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Gives quiet operation
Requires little power consumption
Cools below 0°C
Gives noisy operation

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

None of the listed here
Higher than
Same as
Lower than

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant entropy
Takes place at constant pressure
Takes place at constant temperature
Involves no change in volume

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