3/19/26, 1:51 PM Water distribution practice exam #2 (D1-D2)
Water distribution practice exam #2 (D1-D2) | Most Recent
Exam Actual Complete Real Exam Questions And
Correct Answers (Verified Answers) Already Graded
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Which process converts ammonia to nitrite and nitrate?
Nitrification
What is the maximum advisable rate of chlorine gas removal from a 150- pound
cylinder?
40 pounds per day
What is a type of positive displacement water meter?
Nutating- disk meter
What is a power-operated mechanism for opening and closing a valve?
Actuator
What is required if a routine sample test positive for total coliform bacteria?
Take repeat samples
1/13
, 3/19/26, 1:51 PM Water distribution practice exam #2 (D1-D2)
Why is a grid layout better than a tree layout for a water distribution system?
Less dead-end mains
What is the purpose of a reduced pressure principle assembly?
Prevents back-pressure and back-siphonage
In general, at what depths is shoring required for a trench, if you're excavating in
soil?
5 feet or deeper
What occurs after breakpoint chlorination is achieved?
Free available chlorine residual is directly proportional to the amount of chlorine
added
What is used to automatically shut-off the flow into a tank when the water level
reaches a pre-determined level?
Altitude valve
What would be used to find a chlorine gas leak, which produces white smoke
when it reacts with this substance?
Spray ammonia solution vapor near leak
What causes staining of plumbing fixtures?
Iron & manganese
2/13
Water distribution practice exam #2 (D1-D2) | Most Recent
Exam Actual Complete Real Exam Questions And
Correct Answers (Verified Answers) Already Graded
A+ || Guaranteed Success!! Newest Exam | Just
Released!!
Which process converts ammonia to nitrite and nitrate?
Nitrification
What is the maximum advisable rate of chlorine gas removal from a 150- pound
cylinder?
40 pounds per day
What is a type of positive displacement water meter?
Nutating- disk meter
What is a power-operated mechanism for opening and closing a valve?
Actuator
What is required if a routine sample test positive for total coliform bacteria?
Take repeat samples
1/13
, 3/19/26, 1:51 PM Water distribution practice exam #2 (D1-D2)
Why is a grid layout better than a tree layout for a water distribution system?
Less dead-end mains
What is the purpose of a reduced pressure principle assembly?
Prevents back-pressure and back-siphonage
In general, at what depths is shoring required for a trench, if you're excavating in
soil?
5 feet or deeper
What occurs after breakpoint chlorination is achieved?
Free available chlorine residual is directly proportional to the amount of chlorine
added
What is used to automatically shut-off the flow into a tank when the water level
reaches a pre-determined level?
Altitude valve
What would be used to find a chlorine gas leak, which produces white smoke
when it reacts with this substance?
Spray ammonia solution vapor near leak
What causes staining of plumbing fixtures?
Iron & manganese
2/13
