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SSC-JE ME || Refrigeration and Air-Conditioning - 2

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Question 1

Which of the following statements are TRUE?

1) A primary refrigerant does not undergo phase change in a refrigeration cycle

2) A secondary refrigerant does not undergo phase change in a refrigeration cycle

3) The freezing point of brine is generally lower than the freezing point of its constituents

4) The freezing point of brine is generally higher than the freezing point of its constituents

Question 2

Which of the following replaces the compressor of VCRS cycle in absorption refrigeration cycle?

Question 3

A Bell – Coleman air refrigeration cycle works as a reversed

Question 4

In vapour absorption cycle, lithium bromide is used as

Question 5

In a refrigerator, with formation of frost on cooling coils:

Question 6

An aqua-ammonia absorption refrigeration plant uses heat from a generator by condensing steam at 127

. The temperature maintained in the refrigerator is -23

and the ambient temperature is 27

. The maximum possible COP of the plant is

Question 7

A refrigerator is working on Bell Coleman Cycle with air as working fluid. The pressure ratio is changed from 4 to 8 . The percentage change in COP is

Question 8

In a triple fluid vapour absorption refrigeration system, the hydrogen gas is used to ________.

Question 9

In a VARS system, Heat is supplied to the Generator at 177°C, refrigerated space is maintained at –23°C. If the ambient temperature is 27°C then what will be the COP of the system.

Question 10

Bell Coleman cycle consists of:

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