2-42.
2-43.
2-44.
2-45.
2-46.
Before the quality of a water
source can be deemed suitable for
human needs, what action must first
be taken?
1.
Filtering
2.
Treating
3.
Disinfecting
4.
Testing
What special development process or
action must be performed to make
brackish water acceptable as a
water supply for human needs?
1.
Desalination
2.
Chlorination
3.
Sedimentation
Which of the following descriptions
best define a water supply system?
1.
All of the piping used to
transport water
2.
All of the piping, reservoirs,
and system accessories used to
transport and store water
3.
All of the facilities,
equipment, and piping used to
obtain, treat, and transport
water
4.
A combination of connected
pipes that carry supplied water
to its users
Learning Objective: Describe the
elements and layout of a water
distribution system.
Large size water lines that
interconnect with smaller
distribution mains are called
1.
trunk mains
2.
arterial mains
3.
branch mains
4.
feeder mains
What system accessories are used
for fire-fighting purposes?
1.
2.
3.
4.
Valves
Hydrants
Booster stations
Backflow preventers
2-47.
2-48.
2-49.
2-50.
Which of the following components
should be used to protect against
nonpotable water contaminating the
water system?
1.
Booster valve
2.
Main-line meter
3.
Backflow preventer
4.
Service conection
What type of branch is best for
water distribution?
1.
Loop
2.
Tree
3.
Cross
4.
Lateral
On branch mains, a shutoff valve
should be installed at what
distance from the feeder?
1.
25 feet
2.
50 feet
3.
75 feet
4.
As close as possible
Under preferable conditions, a
hydrant should be located no closer
than how many feet from a building?
1.
25
2.
50
3.
75
4.
100
IN ANSWERING QUESTION 2-51, REFER TO
FIGURE 2-19 IN YOUR TEXTBOOK.
2-51.
For this to be a detailed water
distribution drawing that meets
MINIMUM requirements, which of the
following additional information
should be shown for the 10-inch
line that roughly parallels the
1.
2.
3.
4.
B & O Railroad tracks?
Type of pipe only
Type of pipe and the location,
size, and type of shutoff
valve(s), if any, that are
needed to isolate the line
Type of pipe and its depth
below grade
Type of pipe and its gradient
13
