When referring to motors, to what does the "insulation class" relate?

A. the noise level of the motor
B. the type of base on which the motor is mounted
C. the normal operating temperature of the motor
D. both a and b


Answer: C

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Fill in the blank(s) with correct word

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Between 1880 and 1900, a great debate raged between Edison and Westinghouse over the use of direct current (DC) or ____ current (AC) electricity.

A. anti- B. assimilated C. alternating D. absent

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

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