Basic Mechanical Engineering (3110006) MCQs

MCQs of Refrigeration & Air Conditioning

Showing 21 to 30 out of 40 Questions
1 2 3 4
21.
In the vapour absorption system, which of the following used as an absorbent?
(a) Carbon dioxide
(b) Water
(c) Ammonia
(d) R-22
Answer:

Option (c)

22.
The compressor in the vapour absorption system is replaced by
(a) an absorber
(b) a generator
(c) an absorber and generator
(d) none of the above
Answer:

Option (c)

23.
Which of the following is not component of vapour absorption refrigeration system
(a) Compressor
(b) Generator
(c) Absorber
(d) Evaporator
Answer:

Option (a)

24.
What is the condition of the refrigerant at the exit of the evaporator in the aqua-ammonia absorption system?
(a) Low-pressure ammonia vapour
(b) High-pressure ammonia vapour
(c) Low-pressure strong vapour mixture of ammonia and water
(d) High-pressure strong vapour mixture of ammonia and water
Answer:

Option (a)

25.
An absorber of aqua-ammonia absorption refrigeration system
(a) the strong solution is taken in and weak solution is given out
(b) the weak solution is taken in and a strong solution is given out
(c) the ammonia vapour from a strong solution is taken out and made it a weak solution
(d) none of the above
Answer:

Option (b)

26.
Pick up the correct statement about giving up of heat from one medium to other in the ammonia absorption system.
(a) Strong solution to a weak solution
(b) Weak solution to strong solution
(c) Strong solution to ammonia vapour
(d) Ammonia vapours to weak solution
Answer:

Option (b)

27.
In the vapour absorption refrigeration system, heat is rejected in
(a) condenser only
(b) generator only
(c) absorber only
(d) condenser and absorber
Answer:

Option (d)

28.
Ammonia-absorption refrigeration cycle requires
(a) very little work input
(b) maximum work input
(c) nearly same work input as for vapour compression cycle
(d) zero work input
Answer:

Option (a)

29.
The COP of a vapour compression plant in comparison to vapour absorption plant is
(a) more
(b) less
(c) same
(d) depends on the size of the plant
Answer:

Option (a)

30.
The window air conditioner is mounted on
(a) wall
(b) ceiling
(c) window
(d) floor
Answer:

Option (c)

Showing 21 to 30 out of 40 Questions
1 2 3 4