Applied Thermodynamics (3161910) MCQs

MCQs of Refrigerant and Refrigeration Cycles

Showing 41 to 50 out of 65 Questions
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41.
Absoption system normally uses the following refrigerant:
(a) CO2
(b) SO2
(c) NH3
(d) R-11
Answer:

Option (c)

42.
Aqua-ammonia is used as a refrigerant in the following type of refrigeration system
(a) compression
(b) indirect
(c) absorption
(d) none of the above
Answer:

Option (c)

43.
Fittings in the ammonia absorption refrigeration system are made of
(a) cast steel or forgings
(b) copper
(c) brass
(d) aluminium
Answer:

Option (a)

44.
The work input requirement for ammonia absorption refrigeration cycle is low, because
(a) ammonia has a high thermal conductivity
(b) ammonia has a high latent heat
(c) pumping process involves liquid
(d) pumping process involves vapour
Answer:

Option (c)

45.
The refrigerator which does not require a compressor is known as
(a) vapour absorption refrigerator
(b) vapour compression refrigerator
(c) Electrolux refrigerator
(d) Carnot refrigerator
Answer:

Option (c)

46.
In a lithium bromide absorption refrigeration system
(a) lithium bromide is used as a refrigerant and water as an absorbent
(b) lithium bromide is used as an absorbent and water as a refrigerant
(c) ammonia is used as a refrigerant and lithium bromide as an absorbent
(d) none of the above
Answer:

Option (b)

47.
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)

48.
The fluids used in the Electrolux refrigerator are
(a) water and hydrogen
(b) ammonia and hydrogen
(c) ammonia, water and hydrogen
(d) none of these
Answer:

Option (c)

49.
Cooling water is required for the following equipment in ammonia absorption plant
(a) condenser
(b) evaporator
(c) absorber
(d) Condenser, absorber and separator (rectifier)
Answer:

Option (d)

50.
An Electrolux refrigerator is called
(a) single-fluid absorption system
(b) two-fluids absorption system
(c) three-fluids absorption system
(d) none of the above
Answer:

Option (c)

Showing 41 to 50 out of 65 Questions
2 3 4 5 6 7