REFRIGERATION AND AIR CONDITIONING QUIZ

The COP of a domestic refrigerator

Is less than 1

Depends upon the make

Is equal to 1

Is more than 1

TRUE ANSWER : ?
YOUR ANSWER : ?

Air refrigeration cycle is used in

Commercial refrigerators

Gas liquefaction

Domestic refrigerators

Air conditioning

TRUE ANSWER : ?
YOUR ANSWER : ?

An Electrolux refrigerator is called a ___ absorption system.

Two fluids

Three fluids

None of the listed here

Single fluid

TRUE ANSWER : ?
YOUR ANSWER : ?

In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Sub-cooled liquid region

Superheated vapour region

None of the listed here

Wet vapour region

TRUE ANSWER : ?
YOUR ANSWER : ?

Highest pressure encountered in a refrigeration system should be

Much above critical pressure

Near critical pressure

Critical pressure of refrigerant

Much below critical pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

The freezing point of sulphur dioxide is

-56.6°C

-135.8°C

-75.2°C

-77.7°C

TRUE ANSWER : ?
YOUR ANSWER : ?

The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.4

0.6

0.67

0.376

TRUE ANSWER : ?
YOUR ANSWER : ?

Aqua ammonia is used as refrigerant in the following type of refrigeration system

Direct

Absorption

Indirect

Compression

TRUE ANSWER : ?
YOUR ANSWER : ?

The sub-cooling in a refrigeration cycle

Does not alter C.O.P.

Increases C.O.P.

Decreases C.O.P.

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Ammonia is

Non-inflammable

Highly toxic and inflammable

Toxic and non-inflammable

Non-toxic

TRUE ANSWER : ?
YOUR ANSWER : ?

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