Applied Thermodynamics (3161910) MCQs

MCQs of Refrigerant and Refrigeration Cycles

Showing 11 to 20 out of 65 Questions
1 2 3 4 5 6
11.
The boiling point of ammonia is
(a) -10.5°C
(b) -30°C
(c) -33.3°C
(d) -77.7°C
Answer:

Option (c)

12.
In larger industrial and commercial reciprocating compression systems, the refrigerant widely used is
(a) ammonia
(b) carbon dioxide
(c) sulphur dioxide
(d) R-12
Answer:

Option (a)

13.

Ammonia is one of the oldest refrigerants, which is still used widely, because

(a)

it offers excellent performance
(b)

it is a natural refrigerant
(c)

it is inexpensive
(d)

all of the mentioned
Answer:

Option (d)

14.

The synthetic refrigerants were extremely popular as they are:

(a)

Environment friendly
(b)

Mostly non-toxic, non-flammable and Chemically stable
(c)

Chemically stable
(d)

Mostly non-toxic
Answer:

Option (b)

15.
The ozone depletion potential of air is
(a) 0
(b) 1
(c) 10
(d) 100
Answer:

Option (a)

16.
Which of the following refrigerant has the lowest global warming potential?
(a) R-502
(b) CO2
(c) R-134
(d) R-12
Answer:

Option (b)

17.

Which of the following are secondary refrigerants?

(a)

Water
(b)

Calcium Chloride Brine
(c)

Glycol
(d)

All of the mentioned
Answer:

Option (d)

18.
The chemical formula of R-22 is
(a) CHClF2
(b) CCl2F2
(c) CClF3
(d) CCl3F
Answer:

Option (a)

19.
The designation of CCl3F is
(a) R-11
(b) R-12
(c) R-13
(d) R-14
Answer:

Option (a)

20.
The designation of dichloro-tetrafluoro-ethane is
(a) R-113
(b) R-114
(c) R-115
(d) R-116
Answer:

Option (b)

Showing 11 to 20 out of 65 Questions
1 2 3 4 5 6