REFRIGERATION AND AIR CONDITIONING QUIZ

The positive work in isentropic expansion of liquid is very small

It leads to significant cost reduction

It improves the C.O.P., as the condenser is small

It considerably reduces mass of the system

All of these

Ammonia

CO?

R-12

Corrosion of steel plates

All of these

Freezing at the expansion valve

Restriction to refrigerant flow

Vertical and uniformly spaced

Horizontal and uniformly spaced

Curved lines

Horizontal and non-uniformly spaced

Increases

Decreases

None of these

Remains constant

The standard unit used in refrigeration problems

The refrigeration effect to produce 1 ton of ice at NTP conditions

The cooling effect produced by melting 1 ton of ice

The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours

Vertical and uniformly spaced

Horizontal and uniformly spaced

Horizontal and non-uniformly spaced

Curved lines

25°C DBT and 40% RH

25°C DBT and 100% RH

20°C DBT and 80% RH

22°C DBT and 60% RH

Constant temperature lines

Constant pressure lines

Constant total heat lines

Constant entropy lines

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 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 mass of water vapour present in 1 kg of dry air