Which type of motor has end bells that are open to allow free circulation of ventilation air?
a. hermetic
b. open
c. totally enclosed
d. splash proof
ANSWER: b
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The lap seams in a PVC roof membrane are typically sealed by
A) heat welding. B) liquid adhesives. C) single-sided tape. D) double-sided tape. E) any one of the above.
The Environmental Protection Agency monitors all of the following water pollutants relative to animal
wastes except _____.
a. fecal coliform c. chlorine b. BOD d. ammonia
All 230-V power supplies use the same style plug.
Answer the following statement true (T) or false (F)
What is galvanized iron pipe?
A) Galvanized iron pipe has an outer Teflon coating to help it resist corrosion. B) Galvanized iron pipe is dipped in zinc to make it resistant to corrosion. C) Galvanized iron pipe has been treated to prevent galvanic corrosion. D) Galvanized iron pipe is simply another name for steel pipe.