A ____ permits voltage to be stepped up or down.

a. resistor
b. transformer
c. capacitor
d. battery


b. transformer

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Explain the purposes of the three surety bonds used in a typical building project, and the stages at which they are provided.

What will be an ideal response?

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Which of the following is true of FCA welding?

A. It produces little ultraviolet light. B. Forced ventilation and possibly a respirator must be used. C. Special protective clothing is not necessary. D. It produces very little fumes.

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In addition to the standard contacts, a starter may be provided with externally attached auxiliary contacts, sometimes called ____________________.

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

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The most common types of defrost for commercial refrigeration evaporators are:

A) Electric and hot-gas defrost. B) Reverse cycle and air defrost. C) Mechanical and hydraulic. D) Inductive and ultrasonic defrost.

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