After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve
Before entering the expansion valve
B. Before passing through the condenser
Same as
Lower than
Higher than
None of these
Same as
Lower than
Higher than
None of these
T₁ / (T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁
T₂/ (T₂ - T₁)
20°C DBT and 50% RH
26°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
Same
Lower
Higher
None of these
Remains constant
Increases
Decreases
None of these
Increase
Decrease
May increase or decrease depending on the type of refrigerant used
Remain unaffected
Of cooling medium
Of freezing zone
Of evaporator
At which refrigerant gas becomes liquid
Dry air
Moist air
Saturated air
Specific humidity
Heated and dehumidified
Heated and humidified
Cooled and humidified
Cooled and dehumidified
Iron
Lead
Aluminium
Rubber
Ammonia
R-12
Sulphur dioxide
Carbon dioxide
-20.5°C
-50°C
-63.3°C
-78.3°C
10 %
25 %
50 %
75 %
Dry bulb temperature
Wet bulb temperature
Dew point temperature
Specific humidity
These react with water vapour and cause acid rain
These react with plants and cause greenhouse effect
These react with oxygen and cause its depletion
These react with ozone layer
Gives noisy operation
Gives quiet operation
Requires little power consumption
Cools below 0°C
Reversed Carnot cycle
Reversed Otto cycle
Reversed Joule cycle
Reversed Rankine cycle
Water and hydrogen
Ammonia and hydrogen
Ammonia, water and hydrogen
None of these
Carnot cycle
Rankines cycle
Reversed Carnot cycle
None of the above
Humidification
Dehumidification
Heating and humidification
Cooling and dehumidification
Isentropic compression process
Constant pressure cooling process
Isentropic expansion process
Constant pressure expansion process
Dry bulb depression
Wet bulb depression
Dew point depression
Degree of saturation
Low boiling point
High critical temperature
High latent heat of vaporisation
All of these
Remains constant
Increases
Decreases
None of these
Equal to
Less than
Greater than
None of these
Increases heat transfer
Improves C.O.P. of the system
Increases power consumption
Reduces power consumption
1.33
2.33
3.33
4.33
2 bar
8 bar
15 bar
30 bar
Freon-12
NH3
CO2
Freon-22