Positive
Negative
Zero
None of these
B. Negative
Remains constant
Increases
Decreases
None of these
After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve
Before entering the compressor
Condenser
Evaporator
Absorber
Condenser, absorber and separator (rectifier)
Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced
Curved lines
Sub-cooling or under-cooling
Super-cooling
Normal cooling
None of these
Reversed Carnot cycle
Reversed Joule cycle
Reversed Brayton cycle
Reversed Otto cycle
Single fluid
Two fluids
Three fluids
None of these
Collect liquid refrigerant and prevent it from going to compressor
Detect liquid in vapour
Superheat the vapour
Collect vapours
Saturated liquid
Wet vapour
Dry saturated vapour
Superheated vapour
Above which liquid will remain liquid
Above which liquid becomes gas
Above which liquid becomes vapour
Above which liquid becomes solid
Zero
20
50
100
Condenser
Evaporator
Absorber
None of these
5°C
8°C
14°C
22°C
High pressure liquid refrigerant
Low pressure liquid and vapour refrigerant
Low pressure vapour refrigerant
None of these
Dry air
Moist air
Saturated air
Specific humidity
Same as
Lower than
Higher than
None of these
Remains constant
Increases
Decreases
None of these
Domestic refrigerators
Commercial refrigerators
Air conditioning
Gas liquefaction
R-11
R-12
R-22
Ammonia
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
Positive
Negative
Zero
None of these
Circulating more quantity of cooling water through the condenser
Using water colder than the main circulating water
Employing a heat exchanger
Any one of the above
Water and water
Water and lithium bromide
Ammonia and lithium bromide
Ammonia and water
CO₂
Ammonia
R-12
All of these
It has low operating pressures
It gives higher coefficient of performance
It is miscible with oil over large range of temperatures
All of the above
Temperature, pressure and enthalpy
Specific volume and enthalpy
Temperature and enthalpy
Temperature, pressure, specific volume and enthalpy
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
0.1 to 0.3 TR
1 to 3 TR
3 to 5 TR
5 to 7 TR
Bigger cabinet should be used
Smaller cabinet should be used
Perfectly tight vapour seal should be used
Refrigerant with lower evaporation temperature should be used