Level 1 Water Distribution Practice Test Questions and Answers 100% Correct
Question : The minimum and maximum chloride residual in a
water distribution system is ?
Correct answer: 0.2 mg/l and 4mg/L of free chlorine
Question : Nitrate may not exceed what concentration when
tested yearly for a groundwater treatment plant ?
Correct answer: 10 mg/L
Question : The minimum number of total coliform samples
that must be collected per month is based on Wich of the following ?
Correct answer: The population served by the system
Question : When a distribution bacteriological sample is
positive for a total coliform the procedure is ?
Correct answer: Repeat the sample and take a sample 5
connections upstream and downstream to confirm total coliform
Question : For lead and copper sample the water must be In
the pipeline for at least?
Correct answer: 6 hours
Question : What is hydraulic grade line ?
Correct answer: A line to which the water level would rise in
a small ,vertical tube,connected to the pipe
Question : How often should cathodic protection anodes in
your system be inspected?
Correct answer: Every year
Question : Water pipelines are generally designed to carry
water at a velocity below ?
Correct answer: 2.5b FPS. Feet per second
Question : Energy use in water systems is defined best by ?
Correct answer: Energy use varies among systems and an
energy inventory study would need to be conducted to determine relationships
Question : The minimum recommended separation distance
between a water main and a storm sewer is ?
Correct answer: 6 feet
Question : Which of the following should be in an
organization plan ?
Correct answer: Identifies clear lines ,defines the divisions of
labor ,establishes unity of command
Question : If pipelines are not restrained using steel rods
concrete thrust blocks can be used at ?
Correct answer: Every bend and transition
Question : Engineering Drawings that show the depth of pipe,
the pipe location both vertically and horizontally and the correct distance form a reference point are known as which of the following
Correct answer: Plan and profile drawings
Question : Which are the components of directing staff ?
Correct answer: Motivating & communicating
Question : The accuracy of large meters should fall within
what range ?
Correct answer: Not less than 97% not more than 103%
Question : In some older water system lead service line still
exist. What would be the best practice when finding lead pipe ?
Correct answer: Be replaced
Question : What is the acceptable range for water loss in a
typical municipal distribution system that has a variety of pvc and di pipe ?
