A widely used post-type adjustable wood shore is elevated to the desired final height using a _____

a. come-along
b. pry bar
c. removable jack wrench
d. screw jack


c

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Acetylene, when allowed to mix with air, becomes unstable at _____ psi.

a. 5 b. 10 c. 15 d. 20

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Parvovirus can live in the ground for years.

Answer the following statement true (T) or false (F)

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-6.34 × (-10.3 ) =

A) -16.64 B) 65.302 C) -65.302 D) None of these

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What does the equivalent length of a duct fitting mean?

A) It is a factor that allows comparison of two different-diameter ducts. B) It is the length that air will travel after it leaves a supply register. C) It is the maximum length that any duct run may be. D) It is the length of straight duct that would have a pressure drop equal to the pressure drop through the fitting.

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