The highest power level for a powder-actuated device is _____.

a. 1
b. 5
c. 10
d. 12


d. 12

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The minimum free conductor length for making connections to wiring devices specified by the NECĀ® is _____.

a. 4" (100 mm) b. 6" (150 mm) c. 8" (200 mm) d. 12" (300 mm)

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Brazed carbide tools are ground on:

A) Tungsten carbide wheels B) Aluminum oxide wheels C) Titanium oxide wheels D) Silicon carbide wheels

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When installing a double riser in a commercial refrigeration system, which of the following statements is true?

A) The combined areas of the risers should be greater than the area of the suction line. B) The combined areas of the risers should be less than the area of the suction line. C) The combined areas of the risers should be equal to the area of the suction line. D) Both of the risers should be the same size.

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If one resistor shorts in a parallel circuit, the total current ________

A) equals 0 A B) decreases C) increases D) decreases momentarily, then returns to the original value

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