The maximum length of trunk duct in an extended plenum system is _____.

a. 24' (7.3 m)
b. 16' (4.9 m)
c. 12' (3.7 m)
d. 4' (1.2)


a. 24' (7.3 m)

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The degree of slope required for a horizontal vent is governed by the _____.

a. health department b. atmospheric pressure c. local code d. length of the drain

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A shear block is used _________.

A) at the dead-load anchor of a mullion. B) at the expansion anchor of a mullion. C) to connect a rail to adjacent mullions. D) at a mullion expansion joint to allow the mullion to move. E) none of the above.

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The microfilm used in mechanical engineering is generally prepared as one frame or print attached to this type of card.

a. photocopy b. aperture c. roll d. microfilm

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A transformer that has the secondary winding connected in series with the primary at a junction terminal is a(n) _____.

a. current transformer b. instrument transformer c. power transformer d. autotransformer

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