In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the________________________?
Correct answer: C. Both A. & B.
- A. Range is 15°F
- B. Approach is 10°F
- C. Both A. & B.
- D. Neither A. nor B.
Explanation
The range is the decrease in water temperature, 95 - 80 = 15°F. The approach is the cold-water outlet temperature minus the entering-air wet-bulb temperature, 80 - 70 = 10°F, so both statements are correct.
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