How should you test the tractor-semitrailer connection for security?

a. Pull gently forward in low gear against the locked trailer brakes then look at it carefully.
b. Rock the trailer back and forth with the trailer brakes locked.
c. Look at it carefully.


a. Pull gently forward in low gear against the locked trailer brakes then look at it carefully.

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Rigid inserts are used _____.

a. only on cold applications b. to prevent insulation from being compressed c. to provide structural support for the pipe d. to keep pipe away from the ceiling

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Motors and other rotating electrical machinery in agricultural buildings shall either be totally enclosed or designed to minimize the entrance of ____.

A. ambient static charges B. dust, moisture, or corrosive particles C. lightening off-charges D. grain/seed dust

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A vacuum pump removes water from the air conditioning system by ________________

A) Boiling it. B) Condensing it. C) Mixing it with the oil. D) Pulling it into the desiccant.

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