Decreases
Increases
Remain same
Depends on other factors
B. Increases
Same as
Lower than
Higher than
None of these
Flooded
DX coil
Dry
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
Water at 0°C
Ice at 4°C
Solid and dry ice
Mixture of ice and water under equilibrium conditions
Ammonia is absorbed in hydrogen
Ammonia is absorbed in water
Ammonia evaporates in hydrogen
Hydrogen evaporates in ammonia
Lack of cooling water
Water temperature being high
Dirty condenser surface
All of these
Vertical and uniformly spaced
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced
Curved lines
Brass
Copper
Steel
Aluminium
Superheated vapour refrigerant
Dry saturated liquid refrigerant
A mixture of liquid and vapour refrigerant
None of these
High risibility with oil
Low boiling point
Good electrical conductor
Large latent heat
Inflammable
Toxic
Non-inflammable and toxic
Nontoxic and non-inflammable
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
The human body can lose heat even if its temperature is less than the atmospheric temperature.
The increase in air movement increases the evaporation from the human body.
The warm air increases the rate of radiation of heat from the human body.
Both (A) and (B)
Before entering the compressor
After leaving the compressor
Before entering the condenser
After leaving the condenser
Will be higher
Will be lower
Will remain unaffected
May be higher or lower depending upon the nature of noncondensable gases
Decrease in fin spacing and increase in number of rows
Increase in fin spacing and increase in number of rows
Increase in fin spacing and decrease in number of rows
Decrease in fin spacing and decrease in number of rows
Atmospheric pressure
Slightly above atmospheric pressure
24 bars
56 bars
Zero
0.5
0.75
1.0
Equal to
Less than
Greater than
None of these
Results in loss of heat due to poor heat transfer
Increases heat transfer rate
Is immaterial
Can be avoided by proper design
Remains constant
Increases
Decreases
None of these
Expansion valve to the evaporator
Evaporator to the thermostat
Condenser to the expansion valve
Condenser to the evaporator
0.622 Pv / (Pb - Pv)
μ/[1 - (1 - μ) (Ps/Pb)]
[Pv (Pb - Pd)]/ [Pd (Pb - Pv)]
None of these
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
Remains constant
Increases
Decreases
None of these
Remains constant
Increases
Decreases
None of these
Humidification
Dehumidification
Heating and humidification
Cooling and dehumidification
Remains constant
Increases
Decreases
None of these
Colourless
Odourless
Non-flammable
All of these
(e₁ + e₂)/ e₁ + e₂ - e₁e₂
1/e₁ + 1/e₂
e₁ + e₂
e₁e₂