REFRIGERATION AND AIR CONDITIONING QUIZ

Gas liquefaction

Domestic refrigerators

Air conditioning

Commercial refrigerators

Ammonia vapour goes into solution

Lithium bromide mixes with ammonia

Weak solution mixes with strong solution

Ammonia vapour is driven out of solution

Condenser

Absorber

Evaporator

Condenser, absorber and separator (rectifier)

O.P/3.5

None of these

3.5 × C.O.P.

3.5/C.O.P.

Maximum work input

Very little work input

Zero work input

Nearly same work input as for vapour compression cycle

Decreases

Remains constant

None of these

Increases

Wet bulb depression

Dew point depression

Dry bulb depression

Degree of saturation

-33.3°C

-30°C

-77.7°C

-10.5°C

Remain unaffected

May increase or decrease depending on the type of refrigerant used

Decrease

Increase

Operating the machine at higher speeds

Operating the machine at lower speeds

Lowering the higher temperature

Raising the higher temperature