Question

Consider the following statements about Psychrometry:
A. Dry bulb temperature indicates sensible heat
B. Wet bulb temperature reflects evaporative cooling
C. Relative humidity is independent of temperature
D. Humidity ratio is mass of vapour per mass of dry air
E. Dehumidification adds drying
Choose the correct answer from the options given below:

• A. A, B, C, D only
• B. A, C, D, E only
• C. A, B, D, E only
• D. A, B, C, D, E

Hint:

Wet bulb = evaporation effect; RH depends on temperature.

Answer 1

The Correct Option is C

Concept: Psychrometry deals with properties of moist air including temperature, humidity, and their interrelationships.

Step 1: Evaluating Statement A.
Dry bulb temperature:
• Represents actual air temperature
• Associated with sensible heat Correct.

Step 2: Evaluating Statement B.
Wet bulb temperature:
• Indicates cooling due to evaporation Correct.

Step 3: Evaluating Statement C.
Relative humidity:
• Depends on temperature Thus, incorrect.

Step 4: Evaluating Statement D.
Humidity ratio:
• Defined as mass of vapor per mass of dry air Correct.

Step 5: Evaluating Statement E.
Dehumidification:
• Removes moisture (drying effect) Correct.

Step 6: Final selection. \[ A, B, D, E \] Final Conclusion:
Option (3) is correct.