Suction pressure
Discharge pressure
Critical pressure
Back pressure
A. Suction pressure
Simple air cooling system
Simple evaporative air cooling system
Bootstrap air cooling system
All of these
25°C DBT and 100% RH
20°C DBT and 80% RH
22°C DBT and 60% RH
25°C DBT and 40% RH
It permits higher speeds to be used
It permits complete evaporation in the evaporator
It results in high volumetric and mechanical efficiency
All of the above
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
1
1.25
2.15
5.12
Frosting evaporator
Non-frosting evaporator
Defrosting evaporator
None of these
Reciprocating
Rotating
Centrifugal
Screw
Brass
Copper
Steel
Aluminium
Saturated liquid
Wet vapour
Dry saturated vapour
Superheated vapour
It is toxic to mucous membranes.
It requires large displacement per TR compared to fluoro carbons.
It reacts with copper and its alloys.
All of these
Noisy operation
Quiet operation
Cooling below 0°C
Very little power consumption
Remains constant
Increases
Decreases
None of these
Temperature of medium being cooled must be below that of the evaporator
Refrigerant leaves the condenser as liquid
All solar thermally operated absorption systems are capable only of intermittent operation
Frost on evaporator reduces heat transfer
Before compressor
Between compressor and condenser
Between condenser and evaporator
Between condenser and expansion valve
Gives noisy operation
Gives quiet operation
Requires little power consumption
Cools below 0°C
Reversed Carnot cycle
Bell Coleman cycle
Both (A) and (B)
None of these
High pressure saturated liquid
Wet vapour
Very wet vapour
Dry vapour
Equal to
Less than
Greater than
None of these
Mean radiant temperature
Effective temperature
Dew point temperature
None of these
Isentropic compression process
Constant pressure cooling process
Isentropic expansion process
Constant pressure expansion process
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
Relative humidity
Dew point temperature
Dry bulb temperature
Wet bulb temperature
Saturation point of vapour
Saturation point of liquid
Sublimation temperature
Triple point
Lithium bromide used in vapour absorption cycle is non volatile
Lithium bromide plant can't operate below 0°C
A separator is used in lithium bromide plant to remove the unwanted water vapour by condensing
Concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator
Low weight per tonne of refrigeration
High heat transfer rate
Low temperature at high altitudes
Higher coefficient of performance
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
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
Compressor and condenser
Condenser and receiver
Receiver and evaporator
Evaporator and compressor
Receiver
Expansion valve
Evaporator
Compressor discharge
Before entering the compressor
After leaving the compressor
Before entering the condenser
After leaving the condenser