Dry bulb temperature
Wet bulb temperature
Dew point temperature
Specific humidity
A. Dry bulb temperature
Gives noisy operation
Gives quiet operation
Requires little power consumption
Cools below 0°C
T₁/(T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁
T₂/(T₂ - T₁)
Equal to
Less than
Greater than
None of these
Mean radiant temperature
Effective temperature
Dew point temperature
None of these
Condenser
Evaporator
Compressor
Expansion valve
Before compressor
Between compressor and condenser
Between condenser and evaporator
Between condenser and expansion valve
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
After passing through the condenser
Before passing through the condenser
After passing through the expansion throttle valve
Before entering the expansion valve
Compressor and condenser
Condenser and receiver
Receiver and evaporator
Evaporator and compressor
Increases heat transfer
Improves C.O.P. of the system
Increases power consumption
Reduces power consumption
Water and hydrogen
Ammonia and hydrogen
Ammonia, water and hydrogen
None of these
Domestic refrigerators
Water coolers
Room air conditioners
All of these
Simple air cooling system
Bootstrap air cooling system
Reduced ambient air cooling system
Regenerative air cooling system
High
Low
Optimum
Any value
Increased to a value above its critical temperature
Reduced to a value below its critical temperature
Equal to critical temperature
None of the above
Operating the machine at higher speeds
Operating the machine at lower speeds
Raising the higher temperature
Lowering the higher temperature
-20.5°C
-50°C
-63.3°C
-78.3°C
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
In 1 hour
In 1 minute
In 24 hours
In 12 hours
Results in loss of heat due to poor heat transfer
Increases heat transfer rate
Is immaterial
Can be avoided by proper design
Kinetic theory of gases
Newton's law of gases
Dalton's law of partial pressures
Avogadro's hypothesis
After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve
Before entering the compressor
Dew point temperature decreases
Wet bulb temperature decreases
Dry bulb temperature increases
All of these
Wet bulb temperature
Dry bulb temperature
Dew point temperature
None of these
Frosting evaporator
Non-frosting evaporator
Defrosting evaporator
None of these
1 : 1
1 : 9
9 : 1
1 : 3
Bright green
Yellow
Red
Orange
-10.5°C
-30°C
-33.3°C
-77.7°C
Heat of compression
Work done by compressor
Enthalpy increase in compressor
All of the above
Remains constant
Increases
Decreases
None of these