Which relay terminal is the normally closed (NC) terminal?

A) 87a B) 85 C) 87 D) 30


A

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Motors operate based on the principle of ____________________.

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

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Which of the following is important when lifting a heavy object?

A. Keep weight close to body. B. Use your leg muscles. C. Keep your back straight. D. All of the above

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Why do some gas furnaces NOT require an electrical power supply?

A) They are ignited and extinguished manually with no thermostatic control. B) No gas furnaces require electricity; they operate on gas. C) The gas valve is operated with the voltage generated by the thermopile safety. D) Once lighted, they never shut off.

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Which of the following are composed of a continuous core of rigid foam insulation laminated between two layers of structural board with an adhesive to form a single solid pane?

A. structural insulated panels B. oriented strand boards C. expanded polystyrene boards D. steel studs

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