Chapter 3 Distribution System Facilities
Exam Questions With Accurate
Solutions
True - CORRECT ANSWER-T/F Of special importance to distribution systems operation
is the maintenance of a continuous positive water pressure in the system under all
conditions so as to protect the distribution systems from the entrance of toxic and other
undesirable substances
False. (Downward) - CORRECT ANSWER-T/F They hydraulic grade line always slopes
upward in the direction of flow
False (no protection) - CORRECT ANSWER-T/F Uncovered distribution reservoirs are
desirable due to the adequate protection agains surface contamination
True - CORRECT ANSWER-T/F Public access to reservoirs should be restricted for
safety and security reasons and to reduce vandalism
True - CORRECT ANSWER-T/F Mechanical pipe joints are easy to instal and are
flexible
False (not recommended) - CORRECT ANSWER-T/F Threading of plastic pipe
materials is recommended
True - CORRECT ANSWER-T/F Pipe must be handed very carefully to prevent damage
when it is loaded, transported, and unloaded
, False - CORRECT ANSWER-T/F In the excavation of a trench for water lines, all
concrete and asphalt debris from the cut paving must be used to refill the trench
False (not allowed) - CORRECT ANSWER-T/F Operators are allowed in trenches while
the cross braces are temporarily shifted or moved
True - CORRECT ANSWER-T/F If necessary, when excavating trenches, erect barriers
to keep pedestrians and children in safe, permissible areas.
True - CORRECT ANSWER-T/F All trenches and excavations are unsafe until properly
shored, used, and backfilled
True - CORRECT ANSWER-T/F The safe methods used for jointing in straight pipe are
also used for installing valves, fitting, and fire hydrants that are connected as the
pipeline is laid
False (Dry tap) - CORRECT ANSWER-T/F Tapping a drained line is referred to as a
wet tap
True - CORRECT ANSWER-T/F Globe Valves are very efficient in either flow or
pressure regulation
False (2 at Ts, 3 at crosses) - CORRECT ANSWER-T/F Two valves should be used at
pipe crosses and three at tees
False (greater) - CORRECT ANSWER-T/F Piston-type meters have a slightly smaller
head loss that nutating disc meters
False (downstream) - CORRECT ANSWER-Backflow prevention devices, when used,
are normally installed at the service connection directly upstream from the meter.
Exam Questions With Accurate
Solutions
True - CORRECT ANSWER-T/F Of special importance to distribution systems operation
is the maintenance of a continuous positive water pressure in the system under all
conditions so as to protect the distribution systems from the entrance of toxic and other
undesirable substances
False. (Downward) - CORRECT ANSWER-T/F They hydraulic grade line always slopes
upward in the direction of flow
False (no protection) - CORRECT ANSWER-T/F Uncovered distribution reservoirs are
desirable due to the adequate protection agains surface contamination
True - CORRECT ANSWER-T/F Public access to reservoirs should be restricted for
safety and security reasons and to reduce vandalism
True - CORRECT ANSWER-T/F Mechanical pipe joints are easy to instal and are
flexible
False (not recommended) - CORRECT ANSWER-T/F Threading of plastic pipe
materials is recommended
True - CORRECT ANSWER-T/F Pipe must be handed very carefully to prevent damage
when it is loaded, transported, and unloaded
, False - CORRECT ANSWER-T/F In the excavation of a trench for water lines, all
concrete and asphalt debris from the cut paving must be used to refill the trench
False (not allowed) - CORRECT ANSWER-T/F Operators are allowed in trenches while
the cross braces are temporarily shifted or moved
True - CORRECT ANSWER-T/F If necessary, when excavating trenches, erect barriers
to keep pedestrians and children in safe, permissible areas.
True - CORRECT ANSWER-T/F All trenches and excavations are unsafe until properly
shored, used, and backfilled
True - CORRECT ANSWER-T/F The safe methods used for jointing in straight pipe are
also used for installing valves, fitting, and fire hydrants that are connected as the
pipeline is laid
False (Dry tap) - CORRECT ANSWER-T/F Tapping a drained line is referred to as a
wet tap
True - CORRECT ANSWER-T/F Globe Valves are very efficient in either flow or
pressure regulation
False (2 at Ts, 3 at crosses) - CORRECT ANSWER-T/F Two valves should be used at
pipe crosses and three at tees
False (greater) - CORRECT ANSWER-T/F Piston-type meters have a slightly smaller
head loss that nutating disc meters
False (downstream) - CORRECT ANSWER-Backflow prevention devices, when used,
are normally installed at the service connection directly upstream from the meter.
