Selection and sizing of air ducts is based on _____.

a. air volume
b. height
c. air temperature
d. duct location


a. air volume

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Unloading occurs in what type of system?

A. hydraulic B. mechanical C. pneumatic D. ventilation

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Sparks from a cutting operation can travel at least _____

a. 20 feet b. 30 feet c. 40 feet d. 50 feet

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__________ are devices that, when in place, prevent the accidental energizing of equipment.

A. Lockout devices B. OSHA devices C. Tagout devices D. Warning devices

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____ are used on topographical maps to connect points of elevation; these lines tell whether the land in question is flat or hilly, gently sloped, concave, or convex.

A. Elevation lines B. Interval lines C. Contour lines D. Ridge lines

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