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Water distribution system operation and maintenance test review questions and answers 100%
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Water distribution system operation and maintenance test review
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Water distribution system operation andmaintenance test review
What is the purpose of water distribution systems? - answerTo deliver adequate
quantities of water at sufficient pressure at all times under continually changing
conditions while at the same time protecting water quality
What is the purpose of vacuum, pressure-relief, and pressure-reducing valves? -
answerTo prevent pipe damage from negative or excessively high pressures
Under what conditions is the solid-sheeting shoring method used? When it is necessary
to - answerexcavate in materials that will not stand in a vertical position
When making pipe extensions, why are wet taps preferred over dry taps? -
answerBecause any time the pressure in a pipeline is removed, contamination may
more easily enter that line
What problem can occur when air gets into the water in a pipeline and the air collects
forming pockets of air? - answerAir pockets can increase the resistance to flow or stop
the flow of water completely
What is the advantage of the Venturi type of water meter? - answerextremely accurate
at low flows
What could be the source of supply for a water distribution system? - answerPurchased
water connection, wells, treatment plant clear well
Water distribution system mains are laid out in what types of systems? - answerGrid,
loop, tree(branching)
What are the basic requirements of pipes for water distribution systems? -
answerAdequate strength, durability, maximum corrosion resistance, no adverse effect
on water quality
What type of shores have been tested and approved by OSHA? - answerAir shores,
cylinder shoring, hydraulic shores, screw jacks, solid sheeting
Drinking water quality standards cover all potential chemicals that could enter a water
supply. True or False - answerFalse
Coliform bacteria are considered pathogenic organisms. True or False - answerFalse
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