For a given dry bulb temperature, as the relative humidity __________ the wet bulb temperature will increase.

The pressure at the outlet of a refrigerant compressor is called

The total pressure exerted by the mixture of air and water vapour is equal to the sum of pressures which each constituent would exert, if it occupied the same space by itself. This statement is called

The inclined and non-uniformly spaced straight lines on a psychrometric chart indicates wet bulb temperature.

The drier in a refrigeration system removes moisture in the system.

The air cooling system mostly used in transport type aircrafts is

The lowest thermal diffusivity is of

A simple air cooling system is good for __________ flight speeds.

The critical thickness of insulation is the ratio of thermal conductivity of the insulating material (k) to the heat transfer coefficient at the outer surface of the insulation (h₀).

A low wet bulb temperature indicates very __________ humidity.

The highest temperature during the cycle in a vapour compression system occurs after evaporation.

The heat transfer by conduction through a thick cylinder(Q) is given by (where T₁ = Higher temperature, T₂ = Lower temperature, r₁ = Inside radius, r₂ = Outside radius, l = Length of cylinder, and k = Thermal conductivity)

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, is called

The mass of water vapour present in 1 kg of dry air, is called humidity ratio.

The final relative humidity of the air during cooling and dehumidification is generally __________ than that of entering air.

Air refrigerator works on

Dry bulb temperature is the temperature of air recorded by a thermometer, when

The wet bulb depression indicates __________ humidity of the air.

The transfer of heat by molecular collision is smallest in

During dehumidification process, the relative humidity

In a vapour compression refrigeration system, a throttle valve is used in place of an expander because

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

The emissivity of a polished silver body is __________ as compared to black body.

The reciprocating refrigerant compressors are very suitable for

In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

The refrigerant widely used in domestic refrigerators is

The critical temperature is the temperature

The space between the two walls of a thermos flask is evacuated because vacuum is a __________ conductor of heat.

The critical temperature is the temperature

The unit of overall coefficient of heat transfer is