WATER DISTRIBUTION OPERATOR EXAM 2026 TEST WITH
LATEST UPDATED (QUESTIONS AND ANSWERS) ALREADY
PASSED!
What is the term for the deposition of calcium carbonate on the inside of
a water pipe?
a ) biofilm build up
b ) scale formation
c ) corrosion Correct Answers b) scale formation
when comparing water main pipe, what does a high "C value indicate?
a) the pipe is smooth inside
b) the pipe is rough inside
c) the pipe is brittle and needs to be replaced
d) the pipe has a high tensile strength Correct Answers a) the pipe is
smooth inside
A device used to maintain electrical continuity between household
plumbing and service lines is known as a
a) jumper
b) sacrificial anode
c) tracer line
d) coupon Correct Answers a) jumper
Turbulence due to the velocity of flowing water, roughness of the pipe ,
or restrictions caused fittings can result in
,a) back siphonage
b) scale formation
c) increased head pressure
d) friction loss Correct Answers d ) friction loss
when digging a trench for a water main, the person qualified to choose
the correct type of shoring required for the trench is the
a) chief operator of the system
b) certified operator
c) competent person at the site
d) operator who will be working in the trench Correct Answers c)
competent person at the site
which of the following is a problem that may occur if the tap to a
customer service line is placed at the top of the water main ?
a) the customers line will be subject to corrosion
b) the customer may get sediment or dirt in their service line
c) the water pressure will be too high
d) the customer may get air in their service line Correct Answers D) the
customer may get air in their service line
one advantage of "hot or wet tapping" over "dry tapping" a water line is
that
a) it is less dangerous because it is not done under pressure
b) no specialized tools are required
, c) there is less chance of contamination entering the water main
d) all of the above Correct Answers c) there is less chance of
contamination entering the water main
which type of corrosion is caused by connecting dissimilar metal fitting
in a water system ?
a) caustic corrosion
b) galvanic corrosion
c) oxygen corrosion
d) tubercular corrosion Correct Answers b) galvanic corrosion
which of the following can be used to repair a cracked water main?
a) flanged adapter
b) split sleeve
c) tapered screw plug
d) cast coupling Correct Answers b) split sleeve
which of the following is one method of reducing friction loss in a water
pipe?
a) increasing the velocity of the water
b) removing incrustation from the pipe
c) adding chlorine to the water
d) reducing the hardness of the water Correct Answers b) removing
incrustation from the pipe
LATEST UPDATED (QUESTIONS AND ANSWERS) ALREADY
PASSED!
What is the term for the deposition of calcium carbonate on the inside of
a water pipe?
a ) biofilm build up
b ) scale formation
c ) corrosion Correct Answers b) scale formation
when comparing water main pipe, what does a high "C value indicate?
a) the pipe is smooth inside
b) the pipe is rough inside
c) the pipe is brittle and needs to be replaced
d) the pipe has a high tensile strength Correct Answers a) the pipe is
smooth inside
A device used to maintain electrical continuity between household
plumbing and service lines is known as a
a) jumper
b) sacrificial anode
c) tracer line
d) coupon Correct Answers a) jumper
Turbulence due to the velocity of flowing water, roughness of the pipe ,
or restrictions caused fittings can result in
,a) back siphonage
b) scale formation
c) increased head pressure
d) friction loss Correct Answers d ) friction loss
when digging a trench for a water main, the person qualified to choose
the correct type of shoring required for the trench is the
a) chief operator of the system
b) certified operator
c) competent person at the site
d) operator who will be working in the trench Correct Answers c)
competent person at the site
which of the following is a problem that may occur if the tap to a
customer service line is placed at the top of the water main ?
a) the customers line will be subject to corrosion
b) the customer may get sediment or dirt in their service line
c) the water pressure will be too high
d) the customer may get air in their service line Correct Answers D) the
customer may get air in their service line
one advantage of "hot or wet tapping" over "dry tapping" a water line is
that
a) it is less dangerous because it is not done under pressure
b) no specialized tools are required
, c) there is less chance of contamination entering the water main
d) all of the above Correct Answers c) there is less chance of
contamination entering the water main
which type of corrosion is caused by connecting dissimilar metal fitting
in a water system ?
a) caustic corrosion
b) galvanic corrosion
c) oxygen corrosion
d) tubercular corrosion Correct Answers b) galvanic corrosion
which of the following can be used to repair a cracked water main?
a) flanged adapter
b) split sleeve
c) tapered screw plug
d) cast coupling Correct Answers b) split sleeve
which of the following is one method of reducing friction loss in a water
pipe?
a) increasing the velocity of the water
b) removing incrustation from the pipe
c) adding chlorine to the water
d) reducing the hardness of the water Correct Answers b) removing
incrustation from the pipe
