Refrigeration and Air Conditioning

Question: Defrosting of a refrigerator may be done by stopping the compressor for a short period.
[A].

Correct

[B].

Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Question: In a vapour compression system, the condition of refrigerant before passing through the condenser is
[A].

saturated liquid

[B].

wet vapour

[C].

dry saturated vapour

[D].

superheated vapour

Answer: Option D

Explanation:

No answer description available for this question.

Question: In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is
[A].

high pressure saturated liquid

[B].

wet vapour

[C].

very wet vapour

[D].

dry vapour

Answer: Option A

Explanation:

No answer description available for this question.

Question: During a refrigeration cycle, heat is rejected by the refrigerant in a
[A].

compressor

[B].

condenser

[C].

evaporator

[D].

expansion valve

Answer: Option B

Explanation:

No answer description available for this question.

Question: In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.
[A].

True

[B].

False

Answer: Option A

Explanation:

No answer description available for this question.

Question: In mechanical refrigeration system, the refrigerant has the maximum temperature
[A].

in evaporator

[B].

before expansion valve

[C].

between compressor and condenser

[D].

between condenser and evaporator

Answer: Option C

Explanation:

No answer description available for this question.

Question: The air cooling system mostly used in transport type aircrafts is
[A].

simple air cooling system

[B].

simple evaporative air cooling system

[C].

boot-strap air cooling system

[D].

all of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: A boot-strap air cooling system has
[A].

one heat exchanger

[B].

two heat exchangers

[C].

three heat exchangers

[D].

four heat exchangers

Answer: Option B

Explanation:

No answer description available for this question.

Question: A simple air cooling system is good for __________ flight speeds.
[A].

low

[B].

high

Answer: Option A

Explanation:

No answer description available for this question.

Question: An ordinary passenger aircraft requires a cooling system of capacity.
[A].

2 TR

[B].

4 TR

[C].

8 TR

[D].

10 TR

Answer: Option C

Explanation:

No answer description available for this question.