These are used under a nut or bolt head or at other machinery wear points to serve as a cushion or a bearing surface.

a. threaded insert
b. nut
c. washer
d. dowel pin


c. washer

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By 1775, the ____ were the largest non-English ethnic group in colonial America.

A. Africans B. Germans C. West Indians D. Scots-Irish E. Irish

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

Asbestos-cement piping is considered a hazardous material and should be removed only by properly trained and qualified individuals.

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Which of the following may be used for water supplies, compressed air, and residential gas distribution??  

A. Low-pressure piping systems? B. Medium-pressure piping systems? C. Seamed pipe? D. Spiral pipe?

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A bloodborne _______ is a microorganism that causes disease.

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

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