The top rail of scaffolding should be at least _____.

a. 24" high
b. 36" high
c. 42" high
d. 48" high


c. 42" high

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What is a light-emitting diode (LED)?

What will be an ideal response?

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A cutting plane line shows where the imaginary cut is made and the viewing direction that applies to the section view.

Answer the following statement true (T) or false (F)

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The vertical clearance above roof level must be maintained for a distance of at least ____ ft from all edges of the roof.

A. 3 B. 4 C. 6 D. 8

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According to the power triangle, the apparent power is _____

a. less than the true power b. greater than the true power c. less than the reactive power d. equal to the reactive power

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