The mass of water vapour present in __________ is called absolute humidity. 1 kg of wet air 1 m3 of water 1 m3 of dry air 1 kg of dry air TRUE ANSWER : ? YOUR ANSWER : ?
Air refrigeration cycle is used in Gas liquefaction Air conditioning Domestic refrigerators Commercial refrigerators TRUE ANSWER : ? YOUR ANSWER : ?
The optimum effective temperature for human comfort is Lower in winter than in summer Higher in winter than in summer Same in winter and summer Not dependent on season TRUE ANSWER : ? YOUR ANSWER : ?
The C.O.P. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will May increase or decrease depending on the type of refrigerant used Decrease Increase Remain unaffected TRUE ANSWER : ? YOUR ANSWER : ?
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is 0.6 0.67 0.4 0.376 TRUE ANSWER : ? YOUR ANSWER : ?
Vapour compression refrigeration is somewhat like Reversed Carnot cycle None of these Carnot cycle TRUE ANSWER : ? YOUR ANSWER : ?
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be 0.2 1.2 6 5 TRUE ANSWER : ? YOUR ANSWER : ?
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator. Equalize None of these Increase Reduce TRUE ANSWER : ? YOUR ANSWER : ?
One ton of the refrigeration is The cooling effect produced by melting 1 ton of ice The refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours The refrigeration effect to produce 1 ton of ice at NTP conditions The standard unit used in refrigeration problems TRUE ANSWER : ? YOUR ANSWER : ?
The condition of refrigerant as it leaves the compressor in a vapour compression system is Wet vapour Saturated liquid Dry saturated vapour Superheated vapour TRUE ANSWER : ? YOUR ANSWER : ?