The chemical composition of contacts is such that they operate at cool temperatures of up to ____________________% of their current-carrying capacity.

Fill in the blank(s) with the appropriate word(s).


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

Shingles cut with a utility knife are best done from the finished side of the shingle than the back side.

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Bar graphs and line graphs contain two scales.  The horizontal scale is usually called the y-axis and the vertical scale is normally called the x-axis.

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

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A 100 µF capacitor is connected to a 120 V, 60 Hz power line. What is the capacitive reactance of this circuit?

A. 0.04 W B. 43.7 W C. 26.54 W D. 94.2 W

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Seal face distortion can cause _____

a. misalignment b. excessive leakage c. pitting d. blistering

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