Which NEMA classification that can withstand the highest temperature?

A) Class H B) Class F C) Class A D) Class B


A

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____ is a potential source of ignition that you should recognize.

A. AC current B. Spontaneous combustion C. Carbon dioxide D. Carbon monoxide

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Today's high-temperature engines do not require an intact fan shroud for the cooling fan to be efficient.

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

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____ braking means that the braking energy is turned back into electricity instead of heat.

A. Back B. Energetic C. Thermal D. Regenerative

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A CRI over ____ is considered suitable for residential lighting.

A. 45 B. 55 C. 60 D. 80

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