Which of the following must have at least 2 square feet of surface area exposed to the surrounding earth?

a. Equipment grounding conductor
b. Rod electrode
c. Pipe electrode
d. Plate electrode


d. Plate electrode

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A letterhead should not occupy more than one fifth of the page

Indicate whether the statement is true or false

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The check valve with the notch indicates that it is for:

A) A light-duty set B) An expensive torch set C) A heavy-duty set D) A fuel gas E) None of the above

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This component is sometimes used to counteract engine vibrations:

a. balance shaft b. camshaft c. damper d. both a and c

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Inline cartridge fuses are used:

A) To protect individual heating plates, groups of heating elements, or entire furnaces. B) To protect individual heating elements, groups of heating furnaces, or entire furnaces. C) To protect individual heating plates, groups of heating fans, or half of the furnace. D) To protect individual heating elements, groups of heating elements, or entire furnaces.

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