A steep-slope roof is anything above ____.
A. 2:10
B. 2:12
C. 3:10
D. 4:12
Answer: B
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Time clocks and photo cells are generally ____.
a. used to control AC motors b. provided to monitor the contactors c. provided for overload protection d. used for lighting loads
A pre-travel conference with the site supervisor should include all of the following topics except _____.
a. the location of aerial and underground utilities b. installing the floats on the extended outriggers c. site control of non-essential personnel during the move d. communication method(s) to be used
____ lasers are at the heart of fiber-optics.
A. Semiconductor B. Carbon dioxide C. Metal D. Water-based
Which of these ATC output devices provides a feedback signal to the electronic control module (ECM)?
A) Blend door actuator B) Mode air door motor C) Air inlet door vacuum motor D) Blower motor control