Q. The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

View solution

Q. During sub-cooling, sensible heat from a liquid refrigerant is removed.

View solution

Q. The expression is used for calculating relative humidity.

View solution

Q. If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ, and λ + dλ is represented by (eλ.dλ), then eλ is called

View solution

Q. The wet bulb depression indicates __________ humidity of the air.

View solution

Q. The refrigerant widely used in domestic refrigerators is

View solution

Q. When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmittivity (τ) = 0, then the body is said to be a

View solution

Q. Prandtl number (PN) is given by PN = μ.cp/k.

View solution

Q. In a vapour compression system, the condition of refrigerant before passing through the condenser is

View solution

Q. A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be

View solution

Q. The critical temperature is the temperature

View solution

Q. The evaporator changes the low pressure liquid refrigerant from the expansion valve into

View solution

Q. For air conditioning the operation theatre in a hospital, the percentage of outside air in the air supplied is

View solution

Q. In case ofsensible cooling of air, the coil efficiency is given by

View solution

Q. The cooling system used for supersonic aircrafts and rockets is

View solution

Q. Which of the following statement is correct?

View solution

Q. The desirable property of a refrigerant is

View solution

Q. The humidification process, on the psychrometric chart is shown by

View solution

Q. The colour of the flame of halide torch, in case of leakage of freon refrigerant, will change to

View solution

Q. 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

View solution