A two-foot long wrench can increase an applied force ____________________ as much as a one-foot long wrench.
Fill in the blank(s) with the appropriate word(s).
twice
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Which of the following is/are true about belt-driven positive displacement blowers?
A. Heavy boost blowers use a cogged belt to eliminate slippage. B. ?A cogged blower drive belt takes the place of a vibration damper. C. ?All of the above D. ?None of the above
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In selecting a heating or cooling system, undersizing is generally acceptable, if it is undersized by no more than _____.
a. 5 percent b. 10 percent c. 15 percent d. 20 percent
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There are about half the number of dairy cows in this country that there were in
1950.
Indicate whether the statement is true or false.
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Why should furnaces not rest directly on the ceiling joists?
What will be an ideal response?
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