If the resistance against a centrifugal blower is doubled, the cfm output decreases, and the amperage draw of the motor ____.

A. decreases slightly
B. increases slightly
C. stays the same
D. overheats the motor


Answer: A

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The lockout relay provides a mechanical means of preventing the switch contacts from closing ____ the motor starting circuit is energized.

a. unless b. if c. if and only if d. even if

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When calculating the specific gravity of gas, the substance used as the comparative constant in the formula is:

A) Nitrogen. B) Natural Gas. C) Air. D) Oxygen.

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For a public works project, changes may not be made to any of the documents during which of the following phases?

A. After bid opening, but before award of the contract. B. Before opening of bids, but after advertising for bids. C. After bid opening, but before signing of the agreement. D. After award of the contract, but before signing the agreement.

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Dull tools can be more dangerous than sharp tools

a. true b. false

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