7. One BTU is the amount of heat energy needed to raise the temperature of a. 1

Question

7. One BTU is the amount of heat energy needed to raise the temperature of a. 1 g water by 1 °C b. 1 lb water by I"C c. 1 lb water by 1 . d. 1 gal water by 1 °F. 8. The higher the relative humidity (RID, the higher the wet-bulb temperature the air has. a. True b. False 9. The CFM (cubic foot per minute) requirement of an evaporative cooling system increases as: a. the altitude decreases b light intensity increases c. less fans are used. d. relative humidity (RH) decreases 10. The maximum distance between the pad and fan for an evaporative greenhouse cooling system is: a. 100 feet b. 200 feet c. 300 feet d. 400 feet

Explanation / Answer

7. c. It is the quantity of heat required to raise the temperature of one pound of liquid water by 1 degree Fahrenheit

8. True.

9. Relative humidity decreases.

10. 200 feet. The maximum practical distance in the greenhouse from pad to fan should never exceed 200 feet.

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