Humidification
Dehumidification
Heating and humidification
Cooling and dehumidification
D. Cooling and dehumidification
Vapour compression cycle
Vapour absorption cycle
Air refrigeration cycle
None of these
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
1 m3 of water
1 m3 of dry air
1 kg of wet air
1 kg of dry air
Dew point temperature decreases
Wet bulb temperature decreases
Dry bulb temperature increases
All of these
Horizontal line
Vertical line
Inclined line
Curved line
Same
Less
More
None of these
Operating the machine at higher speeds
Operating the machine at lower speeds
Raising the higher temperature
Lowering the higher temperature
Increases C.O.P
Decreases C.O.P
C.O.P remains unaltered
Other factors decide C.O.P
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
(td₂ - td₃)/(td₃ - td₁)
(td₃ - td₂)/(td₃ - td₁)
(td₃ - td₁)/(td₂ - td₃)
(td₃ - td₁)/(td₃ - td₂)
Noisy operation
Quiet operation
Cooling below 0°C
Very little power consumption
1 m3 of wet air
1 m3 of dry air
1 kg of wet air
1 kg of dry air
Wet bulb temperature
Relative humidity
Dry bulb temperature
Specific humidity
Absolute
Relative
Specific
None of these
Carnot cycle
Reversed Carnot cycle
Rankines cycle
Brayton cycle
Humidification
Dehumidification
Heating and humidification
Cooling and dehumidification
After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve
Before entering the compressor
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
Pressure lines
Temperature lines
Total heat lines
Entropy lines
(C.O.P.)P = (C.O.P.)R + 2
(C.O.P.)P = (C.O.P.)R + 1
(C.O.P)P = (C.O.P)R - 1
(C.O.P)P = (C.O.P)R
Inflammable
Toxic
Non-inflammable and toxic
Nontoxic and non-inflammable
After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve
Before entering the expansion valve
Positive
Negative
Zero
None of these
(td₁ -td₃)/( td₂ -td₃)
(td₂ -td₃)/( td₁ -td₃)
(td₃ -td₁)/( td₂ -td₃)
(td₃ -td₂)/( td₁ -td₃)
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
Water at 0°C
Ice at 4°C
Solid and dry ice
Mixture of ice and water under equilibrium conditions
High pressure saturated liquid
Wet vapour
Very wet vapour
Dry vapour
Same as
Lower than
Higher than
None of these
Dry bulb depression
Wet bulb depression
Dew point depression
Degree of saturation
Suction pressure
Discharge pressure
Critical pressure
Back pressure