Light emitting diodes can be checked with a (an) ________.

A. rheostat
B. electromechanical flasher
C. digital multimeter
D. ohmmeter


Answer: D

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If a large cutting tip pops when the acetylene is turned off, ____.

A. turn the oxygen off first B. turn the acetylene back on C. it is defective and must be discarded D. it must be repaired

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Air-source packaged heat pumps are commonly available in:

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What is the term for the weather resistant surface of a roof?

a. tar paper b. covering c. skin d. decking

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