NV A General Engineering Practice Questions - Nevada A General Engineering Contractor Examination Exam

On a long potable transmission main, combination air-release / vacuum valves are placed primarily at which locations?

Every bell-and-spigot joint Low points and creek crossings only High points and other locations where air can collect or a vacuum can form Only next to fire hydrants

Correct Answer:

High points and other locations where air can collect or a vacuum can form

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