Boxes must be marked with the words "DANGER — HIGH VOLTAGE — KEEP OUT" if they house conductors over _____.

a. 600V
b. 700V
c. 800V
d. 900V


a. 600V

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With commercial projects, because of the various materials that are available, the drafter usually spends several hours a week researching product information.

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

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Which of the following substances is considered a good semiconductor?

a. Copper b. Porcelain c. Silicon d. Silver

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____ streaks in a flame are dust particles burning.

A. Yellow B. Orange C. Blue D. Red

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What type of misalignment is found by taking readings at the 12 o'clock and 6 o'clock positions of the coupling flange?

A. Vertical offset misalignment B. Horizontal offset misalignment C. Horizontal angular misalignment D. Vertical angular misalignment

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