Remains constant
Increases
Decreases
None of these
C. Decreases
Condenser
Evaporator
Absorber
Condenser, absorber and separator (rectifier)
50 kcal/ min
50 kcal/ hr
80 kcal/ min
80 kcal/ hr
Horizontal line
Vertical line
Inclined line
Curved line
Brass
Copper
Steel
Aluminium
Remains constant
Increases
Decreases
None of these
Receiver
Expansion valve
Evaporator
Compressor discharge
Condenser tubes
Evaporator tubes
Refrigerant cooling tubes
Capillary tubes
Simple air cooling system
Simple evaporative air cooling system
Bootstrap air cooling system
All of these
Before compressor
Between compressor and condenser
Between condenser and evaporator
Between condenser and expansion valve
Noisy operation
Quiet operation
Cooling below 0°C
Very little power consumption
Ericson
Stirling
Carnot
Bell Coleman
CO₂
Ammonia
R-12
All of these
Decreases
Increases
Remain same
Depends on other factors
Saturated liquid
Wet vapour
Dry saturated vapour
Superheated vapour
Equal to
Less than
More than
None of these
210 kJ/ min
21 kJ/ min
420 kJ/ min
840 kJ/ min
Mean radiant temperature
Effective temperature
Dew point temperature
None of these
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
Commercial refrigerators
Domestic refrigerators
Air-conditioning
Gas liquefaction
Heat supplied by the gas burner to the heat absorbed by the evaporator
Heat absorbed by the evaporator to the heat supplied by the gas burner
Heat supplied by the gas burner minus the heat absorbed by the evaporator to the heat supplied by the gas burner
Heat absorbed by the evaporator minus the heat supplied by the gas burner to the heat absorbed by the evaporator
B.P.F. - 1
1 - B.P.F.
1/ B.P.F.
1 + B.P.F.
-56.6°C
-75.2°C
-77.7°C
-135.8°C
Domestic refrigerators
Commercial refrigerators
Air conditioning
Gas liquefaction
High pressure saturated liquid
Wet vapour
Very wet vapour
Dry vapour
High risibility with oil
Low boiling point
Good electrical conductor
Large latent heat
20°C DBT and 50% RH
26°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
Centrifugal
Axial
Miniature sealed unit
Piston type reciprocating
Actual COP/theoretical COP
Theoretical COP/actual COP
Actual COP × theoretical COP
None of these
High pressure liquid refrigerant
Low pressure liquid and vapour refrigerant
Low pressure vapour refrigerant
None of these
Zero
0.5
0.75
1.0