Q. Thermal diffusivity of a substance is

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Q. The sensible heat factor during the heating and humidification process is given by (where h1 = Enthalpy of air entering the heating coil, h2 = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

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Q. Sulphur dioxide is extremely toxic and non-flammable.

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Q. The transfer of heat from one body to another takes place only when there is a temperature difference between the bodies.

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Q. A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as

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Q. Thermal diffusivity of a substance is given by (where h = Thermal diffusivity, ρ = Density of substance, S = Specific heat, and k = Thermal conductivity)

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Q. Which of the following statement is correct for ammonia as a refrigerant?

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Q. The conditioned air supplied to the room must have the capacity to take up

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Q. The process of removing moisture from the air, without change in its dry bulb temperature, is called dehumidification.

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Q. The specific humidity during dehumidification process

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Q. Which of the following refrigerant has the lowest freezing point?

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Q. For a white body, absorptivity (α ) = 0, reflectivity (ρ) = 1 and transmittivity (τ) = 0.

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Q. Fouling factor is used

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Q. The natural convection air cooled condensers are used in

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Q. The process, generally used in winter air-conditioning to warm and humidity the air, is called

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Q. At 100% relative humidity, wet bulb temperature, dry bulb temperature, dew point temperature and saturation temperature are equal.

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Q. Bell-Coleman cycle is a

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Q. Which of the following refrigerant has the highest freezing point.

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Q. Air conditioning means

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Q. The emissivity for a black body is

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