Humidity ratio
Relative humidity
Absolute humidity
Degree of saturation
B. Relative humidity
Involves no change in volume
Takes place at constant temperature
Takes place at constant entropy
Takes place at constant pressure
Automatic expansion valve
High side float valve
Thermostatic expansion valve
Low side float valve
Positive
Negative
Zero
None of these
Equalise
Reduce
Increase
None of these
Atmospheric pressure
Slightly above atmospheric pressure
24 bars
56 bars
Does not alter C.O.P.
Increases C.O.P.
Decreases C.O.P.
None of these
Condenser
Evaporator
Absorber
None of these
One tonne is the total mass of machine
One tonne refrigerant is used
One tonne of water can be converted into ice
One tonne of ice when melts from and at 0° C in 24 hours, the refrigeration effect is equivalent to 210 kJ/min
Dry bulb temperature is higher than wet bulb temperature
Dew point temperature is lower than wet bulb temperature
Dry bulb, wet bulb and dew point temperature are same
Dry bulb temperature is higher than dew point temperature
Dry bulb depression
Wet bulb depression
Dew point depression
Degree of saturation
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
Non-toxic
Non-flammable
Non-explosive
High boiling point
Lower than atmospheric pressure
Higher than atmospheric pressure
Equal to atmospheric pressure
Could be anything
Flooded
DX coil
Dry
None of these
Same as
Lower than
Higher than
None of these
0.622 Pv / (Pb - Pv)
μ/[1 - (1 - μ) (Ps/Pb)]
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
None of these
Liquid
Sub-cooled liquid
Saturated liquid
Wet vapour
Operating the machine at higher speeds
Operating the machine at lower speeds
Raising the higher temperature
Lowering the higher temperature
Halide torch
Sulphur sticks
Soap and water
All of these
0.1 to 0.3 TR
1 to 3 TR
3 to 5 TR
5 to 7 TR
Tow specific heat of liquid
High boiling point
High latent heat of vaporisation
Higher critical temperature
Remains constant
Increases
Decreases
None of these
-86.6°C
-95.2°C
-107.7°C
-135.8°C
Condenser tubes
Evaporator tubes
Refrigerant cooling tubes
Capillary tubes
Relative humidity remains constant
Wet bulb temperature increases
Specific humidity increases
Partial pressure of vapour remains constant
Dry air
Moist air
Saturated air
Specific humidity
Saturated liquid
Wet vapour
Dry saturated vapour
Superheated vapour
Strong solution to weak solution
Weak solution to strong solution
Strong solution to ammonia vapour
Ammonia vapours to weak solution
Raise the pressure of the refrigerant
Raise the temperature of the refrigerant
Circulate the refrigerant through the refrigerating system
All of the above
Dry bulb depression
Wet bulb depression
Dew point depression
Degree of saturation