The alternating current phase arrangement on 3-phase busses are ____ from front to back, top to bottom, or left to right, as viewed from the front of the switchboard, switchgear, or panelboard.

A. A, B, C
B. C, B, A
C. B, C, A
D. A, C, B


Answer: A

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Wind turbines for residential applications range in size from 50 watts to ____________________ kW.

Fill in the blank(s) with the appropriate word(s).

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Which type of EGR valve requires a positive exhaust system pressure to operate?

A) Linear B) Negative backpressure C) Positive backpressure D) Digital

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The unit of measurement for sound is the decibel, or one-tenth of a bel.