REFRIGERATION AND AIR CONDITIONING QUIZ

A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Water temperature being high

All of these

Lack of cooling water

Dirty condenser surface

TRUE ANSWER : ?
YOUR ANSWER : ?

Pick up the wrong statement. A refrigerant should have

Higher critical temperature

High latent heat of vaporisation

High boiling point

Tow specific heat of liquid

TRUE ANSWER : ?
YOUR ANSWER : ?

The refrigerant for a refrigerator should have

High latent heat

High total heat

Low latent heat

High sensible heat

TRUE ANSWER : ?
YOUR ANSWER : ?

The undesirable property of a refrigerant is

Non-flammable

Non-toxic

Non-explosive

High boiling point

TRUE ANSWER : ?
YOUR ANSWER : ?

In a domestic vapour compression refrigerator, the refrigerant commonly used is

R-12

Ammonia

All of these

CO?

TRUE ANSWER : ?
YOUR ANSWER : ?

The capillary tube, as an expansion device, is used in

Water coolers

Room air conditioners

All of these

Domestic refrigerators

TRUE ANSWER : ?
YOUR ANSWER : ?

The coefficient of performance is the ratio of the refrigerant effect to the

Work done by compressor

Heat of compression

Enthalpy increase in compressor

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

In which of the following refrigeration system, waste heat can be effectively used?

Vapour absorption cycle

Air refrigeration cycle

None of the listed here

Vapour compression cycle

TRUE ANSWER : ?
YOUR ANSWER : ?

R-12 is generally preferred over R-22 in deep freezers since

It has low operating pressures

All of these

It gives higher coefficient of performance

It is miscible with oil over large range of temperatures

TRUE ANSWER : ?
YOUR ANSWER : ?

The wet bulb depression indicates _________ humidity of the air.

None of these

Specific

Relative

Absolute

TRUE ANSWER : ?
YOUR ANSWER : ?

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