You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:

a. At normal pressure
b. Between 60 and 80 psi.
c. Empty.


a. At normal pressure

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Class ____ is a Standard Class hardboard and remains in the form in which it comes from the press.

A. 1 B. 2 C. 3 D. 4

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In the accompanying figure, this jog circuit uses two momentary-contact pushbutton switches, and one _______________ switch.



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

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How is rebar taken off? In what unit of measure are large quantities ordered?

What will be an ideal response?

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Find the length of valley jack rafter D in the accompanying figure.

A. 23 1/2" B. 24 1/2" C. 25 1/4" D. 26 1/2"

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