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Refrigeration and Air Conditioning

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

Aluminium
Copper
Steel
Brass

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

9: 1
1: 9
1: 3
1: 1

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Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Superheated vapour
Saturated liquid
Wet vapour
Dry saturated vapour

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

High power consumption
Freezing automatic regulating valve
Corrosion of whole system
Ineffective refrigeration

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

High latent heat of vaporisation
High critical temperature
Low boiling point
All of these

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Refrigeration and Air Conditioning
The human body feels comfortable when the heat stored in the body is

Negative
Zero
Positive
None of these

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MORE MCQ ON Refrigeration and Air Conditioning

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