Q. The curved lines on a psychrometric chart indicates

View solution

Q. During humidification process, __________ increases.

View solution

Q. A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

View solution

Q. The counter-current flow heat exchanger can transfer __________ heat than parallel flow heat exchanger.

View solution

Q. The freon group of refrigerants are

View solution

Q. The centrifugal compressors are generally used for refrigerants that require

View solution

Q. The water, alcohol and ammonia have same refrigerating effect at different altitudes.

View solution

Q. The automobile radiator is a heat exchanger of

View solution

Q. In mechanical refrigeration system, the refrigerant occurs as liquid between condenser and expansion valve.

View solution

Q. A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

View solution

Q. For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is __________ that for counter flow.

View solution

Q. A vapour absorption refrigerator uses __________ as a refrigerant.

View solution

Q. Thermal conductivity of air increases with rise in temperature.

View solution

Q. The material of pipe lines for a system using ammonia as a refrigerant should be copper.

View solution

Q. The wave length corresponding to the maximum energy is inversely proportional to the absolute temperature. This statement is called Planck's law.

View solution

Q. The sensible heat gain is due to the __________ difference between the fresh air and the air in space.

View solution

Q. During cooling and dehumidification, dry bulb temperature

View solution

Q. The coefficient of performance of electrolux refrigerator is the ratio of

View solution

Q. The sulphur sticks, in case of leakage of ammonia refrigerant, gives white smoke.

View solution

Q. During gas charging in an ammonia vapour compression system, the connection is made at the compressor outlet.

View solution