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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

Non-toxic
Non-inflammable
Highly toxic and inflammable
Toxic and non-inflammable

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Refrigeration and Air Conditioning
In vapour compression refrigeration system, refrigerant occurs as liquid between

Compressor and evaporator
Expansion valve and evaporator
Condenser and expansion valve
Compressor and condenser

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

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

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Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Condenser
Evaporator
Expansion valve
Compressor

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Refrigeration and Air Conditioning
The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

O.P.)P = (
O.P)P = (
(
O.P)R - 1
O.P.)P = (
(
O.P)R
O.P.)R + 2
O.P)P = (
(
(
O.P.)R + 1

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Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Increase
Reduce
Equalize
None of these

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MORE MCQ ON Refrigeration and Air Conditioning

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