Joist ____ must be used to support wood I-beams.

a.headers
b.boxes
c.hangers
d.stops


ANS: C

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Three-wire control circuit components may be either maintained contact or momentary contact, but the _______________ contact function is specific to three-wire control.

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

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Lemon laws are enacted at the ________ government level.

A) City B) International C) State D) Federal

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When using an opacitymeter to perform a J1667 smoke density test, which of the following tests would require a chassis dynamometer?

A. Idle B. High idle C. Rated speed and load D. Maximum puff at throttle snap

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Dark box design is similar to thevenizing an unknown analog output voltage. The black box represents:

A) a system of unknowns with a known output. B) unknown systems inside the box and unknown outputs outside the box. C) a system of known values cloaked because the details are unimportant. D) one system in a group of systems.

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