Basic Mechanical Engineering (3110006) MCQs

MCQs of Refrigeration & Air Conditioning

Showing 1 to 10 out of 40 Questions
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1.
One ton of the refrigeration is
(a) the standard unit used in refrigeration problems
(b) the cooling effect produced by melting of 1 ton of ice
(c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours
(d) the refrigeration effect to produce 1 ton of ice at NTP conditions
Answer:

Option (c)

2.
In the SI unit, one ton of refrigeration is equal to
(a) 210 kJ/min
(b) 21 kJ/min
(c) 3.5 kJ/min
(d) 420 kJ/min
Answer:

Option (a)

3.
The coefficient of performance is the ratio of
(a) refrigerant effect to the heat of compression
(b) refrigerant effect to the work done by the compressor
(c) refrigerant effect to the enthalpy increase in compressor
(d) all of the above
Answer:

Option (d)

4.
For a domestic refrigerator, the COP is
(a) more than 1
(b) less than 1
(c) equal to 1
(d) unpredictable
Answer:

Option (a)

5.
The refrigerant for a refrigerator should have
(a) high sensible heat
(b) high total heat
(c) high latent heat
(d) low latent heat
Answer:

Option (c)

6.
In the vapour compression refrigeration system, the condition of refrigerant is saturated liquid
(a) after passing through the condenser
(b) before passing through the condenser
(c) before entering the compressor
(d) after passing through the expansion valve
Answer:

Option (a)

7.
In vapour compression refrigeration system, the condition of refrigerant is very wet vapour
(a) after passing through the condenser
(b) before passing through the condenser
(c) before entering the compressor
(d) after passing through the expansion valve
Answer:

Option (d)

8.
In vapour compression refrigeration system, the condition of refrigerant is dry & saturated vapour
(a) after passing through the condenser
(b) before passing through the condenser
(c) before entering the compressor
(d) after passing through the expansion valve
Answer:

Option (c)

9.
The sequence of components in the vapour compression refrigeration system is
(a) compressor, condenser, expansion device, evaporator
(b) compressor, condenser, expansion device, evaporator
(c) expansion devise, compressor, condenser, evaporator
(d) compressor, evaporator, condenser, expansion device
Answer:

Option (b)

10.
In vapour compression cycle, the condition of refrigerant is superheated vapour
(a) after passing through the condenser
(b) before passing through the condenser
(c) after passing through the expansion valve
(d) before entering the expansion valve
Answer:

Option (b)

Showing 1 to 10 out of 40 Questions
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