On a standard psychrometric chart at a fixed (known) total pressure, which pair alone can FIX the state of moist air?
Choices
- (A) Dry-bulb only
- (B) Dry-bulb and wet-bulb (or equivalent two independent properties)
- (C) Dew point only
- (D) Barometric month only
Correct answer: (B)
Dry-bulb and wet-bulb (or equivalent two independent properties)
Explanation
Two independent properties (e.g. T_db + RH, or T_db + T_wb) locate the state (ASHRAE Fundamentals).