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Refrigeration And Air Conditioning MCQ Questions & Answers | Mechanical Engineering

Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-8 section-3

Each section contains 100 MCQs on Refrigeration and Air Conditioning .
71
A refrigerant with the highest critical pressure is
Discuss
Answer & Solution
Answer: Option D
Solution:
A refrigerant with the highest critical pressure is Ammonia
72
The cooling system used for supersonic aircrafts and rockets is
Discuss
Answer & Solution
Answer: Option D
Solution:
The cooling system used for supersonic aircrafts and rockets is Regenerative air cooling system
73
Presence of moisture in a refrigerant affects the working of
Discuss
Answer & Solution
Answer: Option D
Solution:
Presence of moisture in a refrigerant affects the working of expansion valve
74
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and
Discuss
Answer & Solution
Answer: Option C
Solution:
The refrigerant used for absorption refrigerators working on heat from solar collectors is a mixture of water and Lithium bromide
75
The air cooling system mostly used in transport type aircrafts is
Discuss
Answer & Solution
Answer: Option C
Solution:
The air cooling system mostly used in transport type aircrafts is Bootstrap air cooling system
76
The freezing point of sulphur dioxide is
Discuss
Answer & Solution
Answer: Option B
Solution:
The freezing point of sulphur dioxide is -75.2°C.
77
In vapour compression cycle the condition of refrigerant is superheated vapour
Discuss
Answer & Solution
Answer: Option B
Solution:
vapour compression cycle the condition of refrigerant is superheated vapour Before passing through the condenser
78
Most air cooled condensers are designed to operate with a temperature difference of
Discuss
Answer & Solution
Answer: Option C
Solution:
Most air cooled condensers are designed to operate with a temperature difference of 14°C
79
The humidity ratio or specific humidity is the mass of water vapour present in
Discuss
Answer & Solution
Answer: Option D
Solution:
The humidity ratio of moist air can be expressed with:
• The mass of water vapor in the humid air - to the mass of dry air
• The partial pressure of vapor in the air - to the partial pressure of the dry air
80
The reciprocating refrigerant compressors are very suitable for
Discuss
Answer & Solution
Answer: Option C
Solution:
The reciprocating refrigerant compressors are very suitable for Small displacements and high condensing pressures