1
1.25
2.15
5.12
B. 1.25
R-11
R-12
R-22
Ammonia
Halide torch which on detection produces greenish flame lighting
Sulphur sticks which on detection gives white smoke
Using reagents
Smelling
Heated and dehumidified
Heated and humidified
Cooled and humidified
Cooled and dehumidified
Remains constant
Increases
Decreases
None of these
Condenser and expansion valve
Compressor and evaporator
Expansion valve and evaporator
Compressor and condenser
Halide torch
Sulphur sticks
Soap and water
All of these
Saturation point of vapour
Saturation point of liquid
Sublimation temperature
Triple point
Positive
Negative
Zero
None of these
Ensures the evaporator completely filled with refrigerant of the load
Is suitable only for constant load systems
Maintains different temperatures in evaporator in proportion to load
None of the above
Zero
20
50
100
Condensation of the refrigerant vapour
Evaporation of the refrigerant liquid
Compression of the refrigerant vapour
Metering of the refrigerant liquid
Between the combustion chamber and the first heat exchanger
Between the first heat exchanger and the secondary compressor
Between the secondary compressor and the second heat exchanger
Between the second heat exchanger and the cooling turbine
Heat of compression
Work done by compressor
Enthalpy increase in compressor
All of the above
High latent heat of vaporisation and low freezing point
High operating pressures and low freezing point
High specific volume and high latent heat of vaporisation
Low C.O.P. and low freezing point
The mass of water vapour present in 1 m³ of dry air
The mass of water vapour present in 1 kg of dry air
The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure.
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
Ammonia is absorbed in hydrogen
Ammonia is absorbed in water
Ammonia evaporates in hydrogen
Hydrogen evaporates in ammonia
Relative humidity
Dew point temperature
Dry bulb temperature
Wet bulb temperature
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
Relative humidity remains constant
Wet bulb temperature increases
Specific humidity increases
Partial pressure of vapour remains constant
Increase
Decrease
Remain unaffected
May increase or decrease depending on the type of refrigerant used
Automatic expansion valve
High side float valve
Thermostatic expansion valve
Low side float valve
Freezing coil
Cooling coil
Chilling coil
All of these
The constant enthalpy lines are also constant wet bulb temperature lines.
The wet bulb and dry bulb temperature are equal at saturation condition.
The wet bulb temperature is a measure of enthalpy of moist air.
All of the above
Rankine
Carnot
Reversed Rankine
Reversed Carnot
21 kJ/min
210 kJ/min
420 kJ/min
620 kJ/min
1 + C.O.P
1 - C.O.P.
1 + (1/C.O.P)
1 - (1/C.O.P)
Ericson
Stirling
Carnot
Bell Coleman
T₁/(T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁
T₂/(T₂ - T₁)
Carnot cycle
Rankines cycle
Reversed Carnot cycle
None of the above
0.2
1.2
5
6