Q. The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as

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Q. An ordinary passenger aircraft requires a cooling system of capacity.

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

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

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

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Q. Moisture should be removed from refrigerants to avoid

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Q. Which of the following statement is wrong?

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Q. During humidification process, dry bulb temperature

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Q. Fourier's law of heat conduction gives the heat flow for

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Q. In a reversed Brayton cycle, the heat is absorbed by the air during

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Q. Wet bulb temperature is the temperature of air recorded by a thermometer, when

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Q. A device used for transfering heat from one fluid to another is called heat exchanger.

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

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

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

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Q. 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

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Q. When α is absorptivity, ρ is reflectivity and τ is transmittivity, then for a diathermanous body,

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Q. When there is an addition of water vapour to the air of enclosed space, a gain in __________ is said to occur.

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Q. The relative humidity __________ as air gets drier.

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Q. The expression is used for calculating

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