The rate of heat flow through a body is . The term x/kA is known as
In larger industrial and commercial reciprocating compression systems, refrigerent widely used is
A steam pipe is to be lined with two layers of insulating materials of different thermal conductivities. For the minimum heat transfer,
A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as
In aircraft, air refrigeration Cycle is used because of
The overall coefficient of heat transfer is used in problems of
The pressure at the inlet of a refrigerant compressor is called
In a parallel flow heat exchanger, the rate of flow of heat and the rate of decrease of temperature are maximum.
During sensible cooling,
The thermostatic expansion valve is also called
The material of pipe lines for a system using freon as a refrigerant should be
The boiling point of R-is about - 30°C.
The process, generally used in summer air conditioning to cool and dehumidify the air, is called
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
The wave length of the radiation emitted depends only on the temperature and is independent of the material of the body.
The temperature of air recorded by a thermometer, when the moisture present in it begins to condense, is called wet bulb temperature.
The leakage in a refrigeration system using ammonia is detected by
Which of the following statement is wrong?
The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called
The specific humidity during cooling and dehumidification
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents
The lowest temperature during the cycle in a vapour compression system occurs after
The specific humidity during heating and humidification process.
The unit of thermal diffusivity is
The cooling system used for supersonic aircrafts and rockets is
When the discharge pressure is too high in a refrigeration system, high pressure control is installed to stop the compressor.
Which of the following statement is correct?
According to Prevost's theory of exchanges, every body irrespective of its temperature continuously emit heat radiations to the surrounding bodies and at the same time receives heat radiations from the surrounding bodies.
Please disable the adBlock and continue. Thank you.