humidity ratio
relative humidity
absolute humidity
degree of saturation
✅ The correct answer is option D.
Heat Transfer
Relative humidity is given by (where pv = Partial pressure of water vapour, pb = Barometric pressure, ps = Pressure of saturated air, pd = Pressure at dry bulb temperature, pw = Saturation pressure corresponding to wet bulb temperature, and μ = Degree of saturation)
none of these
✅ The correct answer is option B.
The fluids used in electrolux refrigerator are
water and hydrogen
ammonia and hydrogen
ammonia, water and hydrogen
none of these
✅ The correct answer is option C.
The superheated vapour region, in a pressure enthalpy chart, is represented by the space
to the left of saturated liquid line
to the right of saturated liquid line
between the saturated liquid line and saturated vapour line
none of the above
✅ The correct answer is option C.
The boiling point of ammonia is
-10.5°C
-30°C
-33.3°C
-77.7°C
✅ The correct answer is option C.
The air cooling system mostly used in transport type aircrafts is
simple air cooling system
simple evaporative air cooling system
boot-strap air cooling system
all of these
✅ The correct answer is option C.
During heating and humidification, the final relative humidity of air
is higher than that of the entering air
is lower than that of the entering air
can be lower or higher than that of the entering air
none of the above
✅ The correct answer is option C.
During dehumidification process, the relative humidity
remains constant
increases
decreases
✅ The correct answer is option C.
Which of the following refrigerant is highly toxic and flammable?
Ammonia
Carbon dioxide
Sulphur dioxide
R-12
✅ The correct answer is option A.
The freezing point of R-12 is
-86.6°C
-95.2°C
-107.7°C
-135.8°C
✅ The correct answer is option D.