Three-legged jack stands should not be used with pipe larger than _____ nominal size.

a. 4-inch
b. 6-inch
c. 8-inch
d. 10-inch


d. 10-inch

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The mud puppy is fairly common in the Eastern and Central United States

Indicate whether the statement is true or false

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The assistant may become a designer

a. after completing an apprenticeship c. after three to four years b. right away d. after one to two years

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The three general types of materials used in electrical control systems are:

A) Wire, electrical tape, and batteries. B) Conductors, semiconductors, and nonconductors. C) Protons, electrons, and neutrons. D) Wood, concrete, and oil.

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Why does the draft switch close?

A) to power the fan B) to energize the thermostat C) to reset the igniter D) to prove the draft

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