NV A-19A Water Pipelines Practice Questions - Nevada A-19A Pipelines and Conduits for Water Contractor Examination Exam - NV A-19A Water Pipelines Practice Questions - Nevada A-19A Pipelines and Conduits for Water Contractor Examination Exam

Question 1

According to the DIPRA Installation Guide for Ductile Iron Pipe, what hydrostatic test is recommended for a newly installed water main?

At least 1.5 times the stated working pressure at the lowest elevation of the test section, held for two hours Equal to the stated working pressure at the highest elevation, held for 30 minutes Twice the stated working pressure at mid-length, held for 24 hours 50 psi above atmospheric pressure at any hydrant, held for 15 minutes

Correct Answer:

At least 1.5 times the stated working pressure at the lowest elevation of the test section, held for two hours

Question 2

What minimum flushing velocity does DIPRA, citing ANSI/AWWA C651, use when sizing openings to flush a new water main?

1.0 foot per second 2.0 feet per second 3.0 feet per second 5.0 feet per second

Correct Answer:

3.0 feet per second

Question 3

How is a ductile-iron push-on joint assembled?

The gasket is seated in the bell groove and the beveled plain end is pushed into the bell to compress the gasket The gasket is glued to the spigot and the bell is heated until the joint fuses A lead-and-oakum pour is packed into the bell after the pipe is stabbed The joint is threaded and made up with pipe dope and a chain wrench

Correct Answer:

The gasket is seated in the bell groove and the beveled plain end is pushed into the bell to compress the gasket

Question 4

Why does DIPRA require bell holes at each ductile-iron joint?

To store extra polyethylene film and unused gaskets next to the joint So the entire pipe can hang free of the trench bottom until the hydrostatic test is finished To create a sump that collects groundwater away from the pipe barrel So the joint can be assembled and the pipe barrel can rest evenly on the trench bottom

Correct Answer:

So the joint can be assembled and the pipe barrel can rest evenly on the trench bottom

Question 5

When pipe laying stops for the day, what should be done with the open end of a water main?

Leave it open so air can circulate and dry the cement-mortar lining Close it with a watertight plug that can be vented before removal Stuff rags in the bell and cover the trench with plywood only Cap it with polyethylene film taped to the coating

Correct Answer:

Close it with a watertight plug that can be vented before removal

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About this Exam

Prepare with the NV A-19A Water Pipelines Practice Questions - Nevada A-19A Pipelines and Conduits for Water Contractor Examination Exam practice quiz. This question bank includes 100 questions covering pipe, water, ductile-iron, main, and dipra. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NV A-19A Water Pipelines Practice Questions - Nevada A-19A Pipelines and Conduits for Water Contractor Examination Exam

This practice set contains 100 questions from the matching question bank and focuses on pipe, water, ductile-iron, main, and dipra. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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NV A-19A Water Pipelines Practice Questions - Nevada A-19A Pipelines and Conduits for Water Contractor Examination Exam

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