Two types of relief valves are the ____________________ valve and the ____________________ valve.

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


spring-loaded, one-time

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NEC Article 430 covers _____.

a. the application and installation of motors b. provisions for motor-driven equipment c. general information on grounding d. thermal protection requirements

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The breaking down and utilization of plant foods is called _____________________

Fill in the blank(s) with correct word

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A gearmotor is:

A. A reducer and motor combined. B. A specially wound, variable speed motor. C. A motor with a T-face to allow easy coupling to gears. D. A motor with an internally geared rotor.

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What is an example of a salvage material commonly used in buildings?

A. bricks B. laminated beams C. natural stone shingles D. PVC pipe

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