REFRIGERATION AND AIR CONDITIONING QUIZ

Operating the machine at higher speeds

Operating the machine at lower speeds

Lowering the higher temperature

Raising the higher temperature

(td₃ -td₂)/( td₁ -td₃)

(td₃ -td₁)/( td₂ -td₃)

(td₂ -td₃)/( td₁ -td₃)

(td₁ -td₃)/( td₂ -td₃)

0.6

0.4

0.376

0.67

Decreases C.O.P

Increases C.O.P

Other factors decide C.O.P

O.P remains unaltered

remains same

increases

depends on other factors

decreases

R-12

R-22

Ammonia

R-11

Decreases

None of these

Increases

Remains constant

The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure

The mass of water vapour present in 1 m3 of dry air

The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure

The mass of water vapour present in 1 kg of dry air

Remains constant

None of these

Increases

Decreases

Circulate the refrigerant through the refrigerating system

Raise the temperature of the refrigerant

Raise the pressure of the refrigerant

All of these