Category: Refrigeration and Air conditioning Mcqs

A.Ammonia
B.Freon 11
C.Freon 12
D.Carbondioxide
E.Air

A.Cooling
B.Heating
C.Dehumidifying
D.Removal of air impurities
E.All above

A.Freon 12 and water
B.Freon 22 and water
C.Ammonia and water
D.Brine and water
E.Hydrogen and water

A.A solid substance capable of removing moisture from a gas, liquid or solid
B.A substance which reduces the viscosity of liquids
C.Heat given off by cargo
D.A process of removing heat under controlled conditions
E.Anammonia and a water solution

A.CHCIF2
B.CH3CL
C.CCI2F2
D.CCIF3
E.CCIF2CF3

A.60%
B.50%
C.40%
D.69%
E.104%

A.Wet bulb temperature decreases and relative humidity increases
B.Wet bulb temperatures increases and relative humidity decreases
C.Both wet bulb temperatures as well as relative humidity increase
D.Both wet bulb temperature as well as relative humidity decrease
E.Both humidity ratio as well as relative humidity remain constant

A.Is pure ice
B.Contains dissolved air
C.Contains dissolved gases
D.Is produced by blowing air during freezing
E.None of the above

A.As it helps the operator to adjust compressor for greatest efficiency
B.As temperature indicates whether liquid or vapour refrigerant is going to compressor
C.As temperature helps in calculating the coefficient of performance
D.As the performance of other units of the cycle can be controlled
E.None of the above

A.Less than – 50?C
B.Around – 20?C
C.0?C
D.Around 50?C
E.Above 100?C