The difference between dry bulb temperature and dew point temperature, is called

The reduced ambient air cooling system has

An ordinary passenger aircraft requires a cooling system of capacity.

Kirchhoff's law states that

Kirchhoff's law states that

The coefficient of performance (C.O.P.) of a refrigerator working as a heat pump is given by

The leakage in a refrigeration system using freon is detected by

Logarithmic mean temperature difference is the same as the arithmetic mean temperature difference.

The heat of sun reaches to us according to

In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Dew point temperature is the temperature of air recorded by a thermometer, when the moisture present in it begins to condense.

The temperature below which a gas is always liquified, is known as critical temperature.

Film coefficient is defined as the ratio of

The specific humidity during humidification process

The thermal diffusivity for solids is generally less than those for liquids and gases.

If the condenser temperature is kept constant, the coefficient of performance of a refrigeration cycle increases with the increase in evaporator temperature.

Conduction is the process of heat transfer from one particle of the body to another by the actual motion of the heated particles.

The boiling point of ammonia is

A condenser of refrigeration system rejects heat at the rate ofkW, while its compressor consumes a power ofkW. The coefficient of performance of the system will be

In a vapour compression system, the condition of refrigerant is dry saturated vapour

A furnace is made of a red brick wall of thickness 0.5 m and conductivity 0.7 W/mK. For the same heat loss and temperature drop, this can be replaced by a layer of diatomite earth of conductivity 0.W/mK and thickness

The emissive power of a body depends upon its

The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as

Moisture should be removed from refrigerants to avoid

A refrigerant with the highest critical pressure is

In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature

An evaporator is also known as

In actual air-conditioning applications for R-and R-and operating at a condenser temperature ofC and an evaporator temperature ofC, the heat rejection factor is about

In a refrigeration system, the expansion device is connected between the

An electric cable of aluminium conductor (k =W/mK) is to be insulated with rubber (k = 0.W/mK). The cable is to be located in air (h = 6 W/m²). The critical thickness of insulation will be