Refrigeration and Air Conditioning Mcqs

This set of Mechanical engineering Multiple Choice Questions & Answers (MCQs) focuses on study of “ Refrigeration and Air Conditioning ”. These questions are chosen from a collection of most authoritative and best reference books on Mechanical engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Refrigeration and Air Conditioning comprehensively.

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1.
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?

Will be higher

Will be lower

Will remain unaffected

May be higher or lower depending upon the nature of non-condensable gases

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2.
The vapor compression refrigerator employs the following cycle_________________?

Rankine

Carnot

Reversed Rankine

Brayton

Reversed Carnot

Answer Discus (0)

3.
The moisture in a refrigerant is removed by___________________?

Evaporator

Safety relief valve

Dehumidifier

Driers

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4.
In vapor compression cycle the condition off refrigerant is dry saturated vapor________________?

After passing through the condenser

Before passing through the condenser

After passing through the expansion or throttle valve

Before entering the expansion valve

Before entering the compressor

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5.
In vapour compression cycle, the conditii of refrigerant is saturated liquid________________?

After passing through the condenser

Before passing through the condensei

After passing through the expansion throttle valve

Before entering the expansion valve

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6.
An important characteristic of absorption system of refrigeration is__________________?

Noisy operation

Quiet operation

Cooling below 0°C

Very little power consumption

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7.
Vapor compression refrigeration is some what like ____________________?

Carnot cycle

Rankine cycle

Reversed Camot cycle

Reversed Rankine cycle

None of the above

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8.
Ammonia-absorption refrigeration cycle requires__________________?

Very little work input

Maximum work input

Nearly same work input as for vapour compression cycle

Zero work input

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9.
One ton refrigeratiqn corresponds to_________________?

50 kcal/min

50 kcal/kr

80 kcal/min

80 kcal/hr

Answer Discus (0)

10.
A standard ice point temperature corresponds to the temperature of ___________________?

Water at 0°C

Ice at – 4°C

Solid and dry ice

Mixture of ice, water and vapour under equilibrium conditions under NTP conditions

Mixture of ice and water Under equilibrium conditions

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11.
In vapour compression cycle the condition of refrigerant is superheated vapour _____________________?

After passing through the condenser

Before passing through the condenser

After passing through the expansion or throttle valve

Before [entering the expansion valve

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12.
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice_________________?

In 1 hour

In 1 minute

In 24 hours

In 12 hours

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13.
Critical temperature is’ the temperature above which _____________________?

A gas will never liquefy

A gas will immediately liquefy

Water will evaporate

Water will never evaporate

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14.
The COP of a domestic refrigerator___________________?

Is less than 1

Is more than 1

Is equal to 1

Depends upon the make

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15.
Presence of moisture in a refrigerant affects the working of___________________?

Compressor

Condenser

Evaparator

Expansion valve

Answer Discus (0)

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