Rankine
Carnot
Reversed Rankine
Reversed Carnot
D. Reversed Carnot
R-11
R-12
R-22
Ammonia
Compressor
Condenser
Evaporator
Expansion valve
0.2
1.2
5
6
Noisy operation
Quiet operation
Cooling below 0°C
Very little power consumption
Non-toxic
Non-flammable
Non-explosive
High boiling point
High sensible heat
High total heat
High latent heat
Low latent heat
A refrigerant should have low latent heat
If operating temperature of system is low, then refrigerant with low boiling point should be used
Pre-cooling and sub-cooling bf refrigerant are same
Superheat and sensible heat of a refrigerant are same
Simple air cooling system
Bootstrap air cooling system
Reduced ambient air cooling system
Regenerative air cooling system
Increases with increase in velocity of air passing through it
Decreases with increase in velocity of air passing through it
Remains unchanged with increase in velocity of air passing through it
May increase or decrease with increase in velocity of air passing through it depending upon the condition of air entering
Heated and dehumidified
Heated and humidified
Cooled and humidified
Cooled and dehumidified
Freezing coil
Cooling coil
Chilling coil
All of these
Dry bulb temperature is higher than wet bulb temperature
Dew point temperature is lower than wet bulb temperature
Dry bulb, wet bulb and dew point temperature are same
Dry bulb temperature is higher than dew point temperature
Does not alter C.O.P.
Increases C.O.P.
Decreases C.O.P.
None of these
Dew point temperature decreases
Wet bulb temperature decreases
Dry bulb temperature increases
All of these
Wet bulb temperature
Relative humidity
Dry bulb temperature
Specific humidity
One heat exchanger
Two heat exchangers
Three heat exchangers
Four heat exchangers
In vapour absorption refrigerator, the compression of refrigerant is avoided.
Sub-cooling can be achieved by circulating more quantity of cooling water through the condenser.
In vapour compression refrigeration, the vapour is drawn in the compressor cylinder during its suction stroke and is compressed adiabatically during the compression stroke.
All of the above
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
Condenser
Evaporator
Absorber
Condenser, absorber and separator (rectifier)
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
Carbon dioxide
Sulphur dioxide
Fluorine
Increases C.O.P
Decreases C.O.P
C.O.P remains unaltered
Other factors decide C.O.P
Constant pressure lines
Constant temperature lines
Constant total heat lines
Constant entropy lines
Lithium bromide is used as a refrigerant and water as an absorbent
Water is used as a refrigerant and lithium bromide as an absorbent
Ammonia is used as a refrigerant and lithium bromide as an absorbent
None of the above
Dry bulb depression
Wet bulb depression
Dew point depression
Degree of saturation
Remains constant
Increases
Decreases
None of these
Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced
Curved lines
Involves no change in volume
Takes place at constant temperature
Takes place at constant entropy
Takes place at constant pressure
Equal to
Less than
Greater than
None of these
Same
Low
Very low
High