Water Distribution Test 2024 Latest Update Correct Questions & Answers EXAM BUNDLE

The only absolutely reliable method of backflow prevention is the use of - ANSWER Air Gap The bubbles formed in a positive multiple tube fermentation test are - ANSWER Carbon Dioxide The maximum rate of withdrawal of gas from a 150lb chlorine cylinder in 24-hours is - ANSWER 40 lbs If you e...

The pH of 4 is - ANSWER An acid The preserve & maintain a groundwater supply source, the operator must - ANSWER Be careful not to overtax aquifers capability to supply water What chemical is contained in the Bac T bottles? - ANSWER

Back siphonage - ANSWER backflow due to negative or reduced pressure in water system. occurs during low pressure events such as a line leak Reverse flow caused by a loss of supply pressure Back Pressure - ANSWER Is caused when a potable water system is connected to a non potable supply operati...

A check valve must - ANSWER Be able to withstand hydraulic shock loads Excessive amounts of iron & manganese in drinking water are objectionable because they - ANSWER Stain Clothes Check valve important feature(s) must - ANSWER Must close watertight Routine service calls frequently to a wel...

Which process converts ammonia to nitrite and nitrate? - ANSWER Nitrification What is the maximum advisable rate of chlorine gas removal from a 150- pound cylinder? - ANSWER 40 pounds per day What is a type of positive displacement water meter? - ANSWER Nutating- disk meter

Potable water may be defined as: a. Any water that occasionally may be polluted from another source b. Any water that, according to recognized standards, is safe for consumption c. Water high in organic content d. Water that has been transported from outside the service area - ANSWER b). Any w...

What the primary objective of water distribution operators - ANSWER deliver safe and pleasant drinking water to the consumers what should the distribution operator do if there is a complaint about the water? - ANSWER record the info and have the problem investigated and notify the person complain...

Distribution systems are usually laid out in which of the following patterns besides Tree shaped and Grid designs? a. Loops and/or circular designs b. Vertical designs without backflow prevention devices c. Horizontal lines that flow into open ponds then back into a closed pipe d. Horizontal lin...

How many gallons of water per day does the average American family of 4 use? - ANSWER 320 gallons Most of Earth's water is _____. - ANSWER

A factor or value used to indicate the smoothness of the interior of a pipe - ANSWER Cfactor Major parts of water distribution - ANSWER Pipes, storage facilities, pumping stations, valves ,fire hydrants, meters, and other appurtenances Main purpose of water storage facilities - ANSWER To provi...

Which is not a type of water ? - ANSWER Apparent Which layer of a lake is considered nutrient poor? - ANSWER Hypolimnion (Bottom Layer) Copper Sulfate (Blue Stone) is used in lake management to ? - ANSWER Control Algae Bloom

A 6-in. pipeline needs to be flushed. If the desired length of pipeline to be flushed is 316 ft, how many minutes will it take to flush the line at 31 gpm? a. 10 minutes b. 15 minutes c. 30 minutes d. 60 minutes - ANSWER Answer: b. 15 minutes What is the area of a trench that is 22.4 ft lon...

What is the general definition of an ion? An _________ with a positive or negative charge - ANSWER Atom A continuous positive pressure in a distribution system is essential for preventing what event? - ANSWER Backflow Event _____________ water pressure must be maintained to ensure adequate cus...

Which device measures the hydrogen ion activity in a solution? - ANSWER PH Meter What is the purpose of a shaft sleeve in a centrifugal pump? - ANSWER Protects the sleeve from damage What is a nutating disc - ANSWER Type of water meter for small diameter domestic service