equalise
reduce
increase
✅ The correct answer is option C.
Heat Transfer
A thermostatic expansion valve in a refrigeration system
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
✅ The correct answer is option A.
At 100% relative humidity, wet bulb temperature, dry bulb temperature, dew point temperature and saturation temperature are equal.
Correct
Incorrect
✅ The correct answer is option A.
Dehydration is the process of removing water vapour from the surrounding air.
TRUE
FALSE
✅ The correct answer is option A.
During heating and dehumidification process, dry bulb temperature
remains constant
increases
decreases
✅ The correct answer is option B.
Bell-Coleman cycle is a
reversed Carnot cycle
reversed Otto cycle
reversed Joule cycle
reversed Rankine cycle
✅ The correct answer is option C.
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as
conduction
free convection
forced convection
radiation
✅ The correct answer is option B.
Which of the following statement is correct for ammonia as a refrigerant?
It is toxic to mucous membranes.
it requires large displacement per TR compared to fluoro carbons.
It reacts with copper and its alloys.
all of these
✅ The correct answer is option D.
The mass of water vapour present in 1 kg of dry air, is called humidity ratio.
TRUE
FALSE
✅ The correct answer is option A.
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with cp = 1 kJ/kg)
25 kJ/kg
50 kJ/kg
l00 kJ/kg
125 kJ/kg
✅ The correct answer is option B.