water distribution test questions with
100% Correct Solutions
every 4 hours - ANSWER Surface water treatment plants must monitor turbidity
how often?
at the inside bottom of the pipe - ANSWER An invert pipe is located?
composition of the pipe - ANSWER The three common types of plastic pipes are
listed PVC, PE, & PB. These names refer to the?
tuberculation - ANSWER The carring capacity of water mains is often reduced by?
to prevent injury or loss of life - ANSWER What is the main reason for preventing
cave-ins?
20 psi - ANSWER Distribution system pressure (even during fighting demands)
should not be allowed to drop below _______ psi?
25 ft - ANSWER When employees are working in a trench 5 ft deep or more,
an adequate means of exit, such as a ladder or steps, must be located no more
than_________ ft away from them.
5 ft - ANSWER A trench must be shored if it is ______ ft or more?
,3 ft - ANSWER A portable ladder must extend at least ______ ft above the upper surface
of an excavated trench?
sewer line - ANSWER green pipe or green markings on the floor for construction
projects would indicate what kind of pipe line?
reclaimed or recycled line - ANSWER purple pipe or purple markings on the floor for a
construction project would indicate what kind of pipe line?
potable line (drinking water line) - ANSWER blue pipe or blue markings on the floor for a
construction project would indicate what kind of pipe line?
communication lines - ANSWER orange markings on the floor or orange spray paint
for construction projects would indicate what kind of equipment in the ground?
electrical lines - ANSWER red markings on the floor or red spray paint for
construction projects would indicate what kind of equipment in the ground?
is smoother inside - ANSWER When comparing friction loss in various types of pumps,
a larger Hazen-Williams 'C' value indicates the pipe ____________?
35 psi - ANSWER Water should be delivered with a minimum working pressure of?
prevent movement of pipes and joints - ANSWER Thrust blocks are installed to?
200 ppm - ANSWER When using the AWWA spray method for disinfecting the interior
walls of water tanks, the minimum applied chlorine dose is ?
, the carrying capacity of the distribution system - ANSWER Uncontrolled scale deposits in
water mains can reduce?
Back flow that occurs when a vacuum exits - ANSWER Back- siphonage is defined as?
Rate of water flowing through it - ANSWER A venturi tube increases the velocity and
decreases the pressure as water flows through it. This type of tube is used to
measure the?
Difference in pressure between a constricted and a full size portion of the pipe -
ANSWER A venturi meter measures flow of a fluid in a pipe based upon the?
Isolate small areas during emergency conditions - ANSWER Valves are provided in a
distribution system to?
Wet tap - ANSWER A connection that is made into a main that is full or under pressure
is called a?
Check Valve - ANSWER Because it permits flow in only one direction, which valve
would help you determine the direction of the fluid flow?
Prevent backflow of non-potable substances into a drinking water supply - ANSWER
A backflow Preventer is a device used to?
Under register - ANSWER A water meter becomes worn with use, it tends to?
500-800ft - ANSWER Gate valves in pipeline extensions should be located in the
distribution system in such a way that no single break or repair will affect more than?
100% Correct Solutions
every 4 hours - ANSWER Surface water treatment plants must monitor turbidity
how often?
at the inside bottom of the pipe - ANSWER An invert pipe is located?
composition of the pipe - ANSWER The three common types of plastic pipes are
listed PVC, PE, & PB. These names refer to the?
tuberculation - ANSWER The carring capacity of water mains is often reduced by?
to prevent injury or loss of life - ANSWER What is the main reason for preventing
cave-ins?
20 psi - ANSWER Distribution system pressure (even during fighting demands)
should not be allowed to drop below _______ psi?
25 ft - ANSWER When employees are working in a trench 5 ft deep or more,
an adequate means of exit, such as a ladder or steps, must be located no more
than_________ ft away from them.
5 ft - ANSWER A trench must be shored if it is ______ ft or more?
,3 ft - ANSWER A portable ladder must extend at least ______ ft above the upper surface
of an excavated trench?
sewer line - ANSWER green pipe or green markings on the floor for construction
projects would indicate what kind of pipe line?
reclaimed or recycled line - ANSWER purple pipe or purple markings on the floor for a
construction project would indicate what kind of pipe line?
potable line (drinking water line) - ANSWER blue pipe or blue markings on the floor for a
construction project would indicate what kind of pipe line?
communication lines - ANSWER orange markings on the floor or orange spray paint
for construction projects would indicate what kind of equipment in the ground?
electrical lines - ANSWER red markings on the floor or red spray paint for
construction projects would indicate what kind of equipment in the ground?
is smoother inside - ANSWER When comparing friction loss in various types of pumps,
a larger Hazen-Williams 'C' value indicates the pipe ____________?
35 psi - ANSWER Water should be delivered with a minimum working pressure of?
prevent movement of pipes and joints - ANSWER Thrust blocks are installed to?
200 ppm - ANSWER When using the AWWA spray method for disinfecting the interior
walls of water tanks, the minimum applied chlorine dose is ?
, the carrying capacity of the distribution system - ANSWER Uncontrolled scale deposits in
water mains can reduce?
Back flow that occurs when a vacuum exits - ANSWER Back- siphonage is defined as?
Rate of water flowing through it - ANSWER A venturi tube increases the velocity and
decreases the pressure as water flows through it. This type of tube is used to
measure the?
Difference in pressure between a constricted and a full size portion of the pipe -
ANSWER A venturi meter measures flow of a fluid in a pipe based upon the?
Isolate small areas during emergency conditions - ANSWER Valves are provided in a
distribution system to?
Wet tap - ANSWER A connection that is made into a main that is full or under pressure
is called a?
Check Valve - ANSWER Because it permits flow in only one direction, which valve
would help you determine the direction of the fluid flow?
Prevent backflow of non-potable substances into a drinking water supply - ANSWER
A backflow Preventer is a device used to?
Under register - ANSWER A water meter becomes worn with use, it tends to?
500-800ft - ANSWER Gate valves in pipeline extensions should be located in the
distribution system in such a way that no single break or repair will affect more than?
