Superheated vapour refrigerant
Dry saturated liquid refrigerant
A mixture of liquid and vapour refrigerant
None of these
A. Superheated vapour refrigerant
Equal to
Less than
More than
None of these
Compression
Direct
Indirect
Absorption
Strong solution to weak solution
Weak solution to strong solution
Strong solution to ammonia vapour
Ammonia vapours to weak solution
Cooled and humidified
Cooled and dehumidified
Heated and humidified
Heated and dehumidified
A gas will never liquefy
A gas will immediately liquefy
Water will evaporate
Water will never evaporate
Cost is too high
Capacity control is not possible
It is made of copper
Required pressure drop cannot be achieved
Gives noisy operation
Gives quiet operation
Requires little power consumption
Cools below 0°C
In 1 hour
In 1 minute
In 24 hours
In 12 hours
Dehumidification
Cooling and humidification
Cooling and dehumidification
Dehumidification and pure sensible cooling
Heated and dehumidified
Heated and humidified
Cooled and humidified
Cooled and dehumidified
Sub-cooling or under-cooling
Super-cooling
Normal cooling
None of these
21 kJ/min
210 kJ/min
420 kJ/min
620 kJ/min
Reduce compressor overheating
Reduce compressor discharge temperature
Increase cooling effect
Ensure that only liquid and not the vapour enters the expansion (throttling) valve
Actual COP/theoretical COP
Theoretical COP/actual COP
Actual COP × theoretical COP
None of these
Same
More
Less
More or less depending on ambient conditions
Which lies between the dry bulb and wet bulb temperatures of the incoming stream
Which lies between the wet bulb and dew point temperatures of the incoming stream
Which is lower than the dew point temperature of the incoming stream
Of adiabatic saturation of incoming stream
0.1 to 0.5 h.p. per ton of refrigeration
0.5 to 0.8 h.p. per ton of refrigeration
1 to 2 h.p. per ton of refrigeration
2 to 5 h.p. per ton of refrigeration
Halide torch which on detection produces greenish flame lighting
Sulphur sticks which on detection gives white smoke
Using reagents
Smelling
Zero
20
50
100
Halide torch
Sulphur sticks
Soap and water
All 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
Remains constant
Increases
Decreases
None of these
Removes heat from a low temperature body and delivers it to a high temperature body
Removes heat from a high temperature body and delivers it to a low temperature body
Rejects energy to a low temperature body
None of the above
Automatic expansion valve
High side float valve
Thermostatic expansion valve
Low side float valve
It considerably reduces mass of the system
It improves the C.O.P., as the condenser is small
The positive work in isentropic expansion of liquid is very small
It leads to significant cost reduction
25°C DBT and 100% RH
20°C DBT and 80% RH
22°C DBT and 60% RH
25°C DBT and 40% RH
Wet bulb temperature
Relative humidity
Dry bulb temperature
Specific humidity
Lithium bromide used in vapour absorption cycle is non volatile
Lithium bromide plant can't operate below 0°C
A separator is used in lithium bromide plant to remove the unwanted water vapour by condensing
Concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator
Above which liquid will remain liquid
Above which liquid becomes gas
Above which liquid becomes vapour
Above which liquid becomes solid
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