321. The alignment circle is marked on the psychrometric chart at
20°C DBT and 50% RH
26°C DBT and 50% RH
20°C DBT and 60% RH
26°C DBT and 60% RH
✅ The correct answer is option B.
Heat Transfer, Refrigeration and Air Conditioning MCQs
322. The wave length corresponding to the maximum energy is inversely proportional to the absolute temperature. This statement is called Planck’s law.
Yes
No
✅ The correct answer is option B.
323. Dew point temperature is the temperature of air recorded by a thermometer, when the moisture present in it begins to condense.
Correct
Incorrect
✅ The correct answer is option A.
324. A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called
dry air
moist air
saturated air
specific humidity
✅ The correct answer is option C.
325. The critical temperature is the temperature
below which a gas does not obey gas laws
above which a gas may explode
below which a gas is always liquified
above which a gas will
✅ The correct answer is option D.
326. In a psychrometric chart, dew point temperature lines are horizontal and non-uniformly spaced.
Correct
Incorrect
✅ The correct answer is option A.
327. The wet bulb temperature at 100% relative humidity is __________ dry bulb temperature.
same as
lower than
higher than
✅ The correct answer is option A.
328. A device used for transfering heat from one fluid to another is called heat exchanger.
TRUE
FALSE
✅ The correct answer is option A.
329. Moisture should be removed from refrigerants to avoid
freezing at the expansion valve
restriction to refrigerant flow
corrosion of steel plates
all of these
✅ The correct answer is option D.
330. R-11 has the highest critical point temperature.
Correct
Incorrect
✅ The correct answer is option A.