How many air changes can a fan moving 200 CFM provide for a room with 1000 square feet of floor space and 10 foot ceilings?
A) 20 air changes B) 12 air changes C) 5 air changes D) 1 air change
B
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Which of the following is not a function of mulch?
A) holds the grass seeds in place B) disperses seed C) increases evaporation rate D) provides a chemical attractant
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It is possible to have a control relay with a 24-volt coil and 220-volt contacts.
Answer the following statement true (T) or false (F)
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Pipe hangers are most often attached to various anchors or rod attachments with _____.
a. clips b. screws c. nails d. threaded rods
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Which of the following sciences are (is) a part of agriculture?
A) biology B) chemistry C) physics D) all of the above
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