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-4 section-1

During a refrigeration cycle, heat is rejected by the refrigerant in a

A) Compressor B) Condenser C) Evaporator D) Expansion valve

Discuss

Answer & Solution

Answer: Option B

Solution:

During a refrigeration cycle, heat is rejected by the refrigerant in a Condenser

Freon group of refrigerants are

A) Inflammable B) Toxic C) Non-inflammable and toxic D) Nontoxic and non-inflammable

Discuss

Answer & Solution

Answer: Option D

Solution:

Freon group of refrigerants are Nontoxic and non-inflammable

The Freon group of refrigerants are

A) Halocarbon refrigerants B) Zoetrope refrigerants C) Inorganic refrigerants D) Hydrocarbon refrigerants

Discuss

Answer & Solution

Answer: Option A

Solution:

The Freon group of refrigerants are Halocarbon refrigerants

One ton of the refrigeration is

A) The standard unit used in refrigeration problems B) The cooling effect produced by melting 1 ton of ice C) The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours D) The refrigeration effect to produce 1 ton of ice at NTP conditions

Discuss

Answer & Solution

Answer: Option C

Solution:

One ton of the refrigeration is The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours

The power per tonne of refrigeration is

A) $$\frac{{3.5}}{{{\text{C}}{\text{.O}}{\text{.P}}{\text{.}}}}$$ B) $$\frac{{{\text{C}}{\text{.O}}{\text{.P}}{\text{.}}}}{{3.5}}$$ C) 3.5 × C.O.P. D) None of these

Discuss

Answer & Solution

Answer: Option A

Solution:

The power per tonne of refrigeration is $$\frac{{3.5}}{{{\text{C}}{\text{.O}}{\text{.P}}{\text{.}}}}$$

An important characteristic of absorption system of refrigeration is

A) noisy operation B) quiet operation C) cooling below 0°C D) very little power consumption

Discuss

Answer & Solution

Answer: Option B

Solution:

An important characteristic of absorption system of refrigeration is quiet operation

The evaporator used in household refrigerators is

A) Frosting evaporator B) Non-frosting evaporator C) Defrosting evaporator D) None of these

Discuss

Answer & Solution

Answer: Option A

Solution:

The evaporator used in household refrigerators is Frosting evaporator

Chaperon equation is a relation between

A) Temperature, pressure and enthalpy B) Specific volume and enthalpy C) Temperature and enthalpy D) Temperature, pressure, specific volume and enthalpy

Discuss

Answer & Solution

Answer: Option D

Solution:

Chaperon equation is a relation between temperature, pressure, specific volume and enthalpy.
The Clausius-Clapeyron equation used to estimate the vapor pressure at another temperature, if the vapor pressure is known at some temperature and if the enthalpy of vaporization is known.

If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

A) Same B) More C) Less D) More/less depending on rating

Discuss

Answer & Solution

Answer: Option B

Solution:

If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be more.

In vapour compression cycle, the condition of refrigerant is saturated liquid

A) After passing through the condenser B) Before passing through the condenser C) After passing through the expansion throttle valve D) Before entering the expansion valve

Discuss

Answer & Solution

Answer: Option A

Solution:

In vapour compression cycle, the condition of refrigerant is saturated liquid After passing through the condenser