The leaks in a refrigeration system using Freon are detected by Using reagents Halide torch which on detection produces greenish flame lighting Smelling Sulphur sticks which on detection gives white smoke 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 6 0.2 1.2 5 TRUE ANSWER : ? YOUR ANSWER : ?
The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy diagram represents Compression of the refrigerant vapour Condensation of the refrigerant vapour Evaporation of the refrigerant liquid Metering of the refrigerant liquid TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following refrigerant is highly toxic and flammable? Sulphur dioxide Ammonia Carbon dioxide R-12 TRUE ANSWER : ? YOUR ANSWER : ?
Rating of a domestic refrigerator is of the order of 10 tons 5 tons 0.1 ton 40 tons TRUE ANSWER : ? YOUR ANSWER : ?
The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P. Equally Unpredictable More Less TRUE ANSWER : ? YOUR ANSWER : ?
The undesirable property of a refrigerant is Non-flammable High boiling point Non-explosive Non-toxic TRUE ANSWER : ? YOUR ANSWER : ?
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called Wet bulb temperature None of these Dew point temperature Dry bulb temperature 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 Increase None of these Reduce TRUE ANSWER : ? YOUR ANSWER : ?
The wet bulb depression indicates _________ humidity of the air. Absolute Specific None of these Relative TRUE ANSWER : ? YOUR ANSWER : ?