20°C DBT and 50% RH
26°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
B. 26°C DBT and 50% RH
Isentropic compression process
Constant pressure cooling process
Isentropic expansion process
Constant pressure expansion process
Decreases
Increases
Remain same
Depends on other factors
Dry bulb temperature
Wet bulb temperature
Dew point temperature
Specific humidity
Saturated liquid
Wet vapour
Dry saturated vapour
Superheated vapour
After passing through the condenser
Before passing through the condenser
After passing through the expansion or throttle valve
Before entering the compressor
Ericson
Stirling
Carnot
Bell Coleman
In 1 hour
In 1 minute
In 24 hours
In 12 hours
Copper
Aluminium
Steel
Brass
Ammonia
Carbon dioxide
Freon
Brine
Centrifugal
Axial
Miniature sealed unit
Piston type reciprocating
5°C
8°C
14°C
22°C
Tow specific heat of liquid
High boiling point
High latent heat of vaporisation
Higher critical temperature
Iron
Lead
Aluminium
Rubber
Raise the pressure of the refrigerant
Raise the temperature of the refrigerant
Circulate the refrigerant through the refrigerating system
All of the above
Colourless
Odourless
Non-flammable
All of these
Same as
Lower than
Higher than
None of these
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
B.P.F. - 1
1 - B. P.F.
1/ B.P.F.
1 + B.P.F.
0.622 Pv/ (Pb - Pv)
μ/[1 - (1 - μ) (Ps/Pb)]
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
None of these
(td₁ -td₃)/( td₂ -td₃)
(td₂ -td₃)/( td₁ -td₃)
(td₃ -td₁)/( td₂ -td₃)
(td₃ -td₂)/( td₁ -td₃)
-86.6°C
-95.2°C
-107.7°C
-135.8°C
0.1 ton
5 tons
10 tons
40 tons
Same
Lower
Higher
None of these
50 kcal/ min
50 kcal/ hr
80 kcal/ min
80 kcal/ hr
20 to 50°C
50 to 70°C
70 to 110°C
None of these
T₁ / (T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁
T₂/ (T₂ - T₁)
Ensures the evaporator completely filled with refrigerant of the load
Is suitable only for constant load systems
Maintains different temperatures in evaporator in proportion to load
None of the above
Low boiling point
High critical temperature
High latent heat of vaporisation
All of these
Non-toxic
Non-flammable
Non-explosive
High boiling point
Remains constant
Increases
Decreases
None of these