Same as
Lower than
Higher than
None of these
A. Same as
Reduce compressor overheating
Reduce compressor discharge temperature
Increase cooling effect
Ensure that only liquid and not the vapour enters the expansion (throttling) valve
After passing through the condenser
Before passing through the condenser
After passing through the expansion throttle valve
Before entering the expansion valve
Halide torch
Sulphur sticks
Soap and water
All of these
1
1.25
2.15
5.12
Constant pressure lines
Constant temperature lines
Constant total heat lines
Constant entropy lines
Zero
20
50
100
(hA - h2)/ (h1 - h2)
(h2 - hA)/ (h1 - h2)
(h1 - h2)/ (hA - h2)
(hA - h1)/ (h2 - h1)
Room sensible heat load only
Room latent heat load only
Both room sensible heat and latent heat loads
None of the above
A gas will never liquefy
A gas will immediately liquefy
Water will evaporate
Water will never evaporate
Suction pressure
Discharge pressure
Critical pressure
Back pressure
Relative humidity remains constant
Wet bulb temperature increases
Specific humidity increases
Partial pressure of vapour remains constant
Equal to
Less than
Greater than
None of these
Same
Low
Very low
High
Reversed Carnot cycle
Reversed Joule cycle
Reversed Brayton cycle
Reversed Otto cycle
In 1 hour
In 1 minute
In 24 hours
In 12 hours
210 kJ/ min
21 kJ/ min
420 kJ/ min
840 kJ/ min
Can be lower or higher than that of the entering air
Is lower than that of the entering air
Is higher than that of the entering air
None of the above
Will be higher
Will be lower
Will remain unaffected
May be higher or lower depending upon the nature of noncondensable gases
Humidity ratio
Relative humidity
Absolute humidity
Degree of saturation
Coefficient of performance of refrigeration
Coefficient of performance of heat pump
Relative coefficient of performance
Refrigerating efficiency
Copper
Aluminium
Steel
Brass
Centrifugal
Axial
Miniature sealed unit
Piston type reciprocating
The human body can lose heat even if its temperature is less than the atmospheric temperature.
The increase in air movement increases the evaporation from the human body.
The warm air increases the rate of radiation of heat from the human body.
Both (A) and (B)
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
Expansion valve to the evaporator
Evaporator to the thermostat
Condenser to the expansion valve
Condenser to the evaporator
Ammonia vapour goes into solution
Ammonia vapour is driven out of solution
Lithium bromide mixes with ammonia
Weak solution mixes with strong solution
1 m3 of water
1 m3 of dry air
1 kg of wet air
1 kg of dry air
Flooded
DX coil
Dry
None of these
Cooled and humidified
Cooled and dehumidified
Heated and humidified
Heated and dehumidified
Dry bulb temperature
Wet bulb temperature
Dew point temperature
Relative humidity