Refrigeration And Air Conditioning MCQ Questions & Answers

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-1 section-3

Air conditioning means

A) Cooling B) Heating C) Dehumidifying D) All of these

Discuss

Answer & Solution

Answer: Option D

Solution:

Air conditioning means Cooling, Heating, Dehumidifying.

In a psychrometric chart, specific humidity (moisture content) lines are

A) Vertical and uniformly spaced B) Horizontal and uniformly spaced C) Horizontal and non-uniformly spaced D) Curved lines

Discuss

Answer & Solution

Answer: Option B

Solution:

In a psychrometric chart, specific humidity (moisture content) lines are Horizontal and uniformly spaced

The reduced ambient air cooling system has

A) One cooling turbine and one heat exchanger B) One cooling turbine and two heat exchangers C) Two cooling turbines and one heat exchanger D) Two cooling turbines and two heat exchangers

Discuss

Answer & Solution

Answer: Option C

Solution:

The reduced ambient air cooling system has Two cooling turbines and one heat exchanger

A bootstrap air cooling system has

A) One heat exchanger B) Two heat exchangers C) Three heat exchangers D) Four heat exchangers

Discuss

Answer & Solution

Answer: Option B

Solution:

A bootstrap air cooling system has Two heat exchangers

The bypass factor for a cooling coil

A) Increases with increase in velocity of air passing through it B) Decreases with increase in velocity of air passing through it C) Remains unchanged with increase in velocity of air passing through it D) May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering

Discuss

Answer & Solution

Answer: Option A

Solution:

The bypass factor for a cooling coil Increases with increase in velocity of air passing through it

Most thermostatic expansion valves are set for a superheat of

A) 5°C B) 10°C C) 15°C D) 20°C

Discuss

Answer & Solution

Answer: Option A

Solution:

Most thermostatic expansion valves are set for a superheat of 5°C

For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

A) Reciprocating B) Rotating C) Centrifugal D) Screw

Discuss

Answer & Solution

Answer: Option C

Solution:

For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is Centrifugal

One tonne of refrigeration (1TR) means that the heat removing capacity is

A) 21 kJ/min B) 210 kJ/min C) 420 kJ/min D) 620 kJ/min

Discuss

Answer & Solution

Answer: Option B

Solution:

One tonne of refrigeration (1TR) means that the heat removing capacity is 210 kJ/min

Refrigeration in aeroplanes usually employs the following refrigerant

A) CO₂ B) Freon-11 C) Freon-22 D) Air

Discuss

Answer & Solution

Answer: Option D

Solution:

Refrigeration in aeroplanes usually employs the following refrigerant air.

Absorption system normally uses the following refrigerant

A) Freon-11 B) Freon-22 C) CO₂ D) Ammonia

Discuss

Answer & Solution

Answer: Option D

Solution:

Absorption system normally uses the Ammonia refrigerant.