Water Distribution Exam | 83
Questions and Answers Verified 100%
Correct
velocity of flow in mains is usually expressed in terms of - ANSWER feet per second (FPS)
When opening and closing valves in high pressure lines, the valves should be
opened and closed ___ - ANSWER Slowely
Pressure is usually measured in - ANSWER pounds per square inch (PSI)
a water main should be disinfected - ANSWER After the pipe is laid in place.
A new section of water main has just been laid. Before it is completely back-filled and
put into service, several thing must be done. What is the correct order for doing them? -
ANSWER pressure test, flush, disinfect, flush, collect bacti samples
samples taken for routine analysis should be preserved by ___ - ANSWER refrigerating
what is HYDRANT BURY? - ANSWER vertical distance between the ground and
the bottom of the hydrant branch or pipe connection
An aquifer is ________. - ANSWER A water-bearing stratum of rock, sand, or gravel
, the difference between the static level and the pumping level of a well is called
- ANSWER Drawdown
The carrying capacity of water mains is often reduced by ___ - ANSWER tuberculation
When installing service lines, it is a good practice to provide for movement due
to settling by installing a ___ - ANSWER bend or gooseneck in the pipe
The term water table is used in reference to the - ANSWER level to which the soil or
rock voids are saturated with groundwater.
A pneumatic ejector lifts water from low points to higher levels. The device used -
ANSWER
to achieve this is a(n) - ANSWER air compressor.
The subsurface component parts of a well include the - ANSWER well casing.
In determining the purity of a water sample, it is usually tested for the presence of
the coliform organism because - ANSWER its presence indicates the water has been
polluted.
The first time a distribution system water sample comes back marked unsafe,
you should - ANSWER take another sample from the same location.
When a centrifugal pump with new packing is started and the packing seems to leak
air, the proper procedure is to - ANSWER stop the motor and repack the stuffing box.
Questions and Answers Verified 100%
Correct
velocity of flow in mains is usually expressed in terms of - ANSWER feet per second (FPS)
When opening and closing valves in high pressure lines, the valves should be
opened and closed ___ - ANSWER Slowely
Pressure is usually measured in - ANSWER pounds per square inch (PSI)
a water main should be disinfected - ANSWER After the pipe is laid in place.
A new section of water main has just been laid. Before it is completely back-filled and
put into service, several thing must be done. What is the correct order for doing them? -
ANSWER pressure test, flush, disinfect, flush, collect bacti samples
samples taken for routine analysis should be preserved by ___ - ANSWER refrigerating
what is HYDRANT BURY? - ANSWER vertical distance between the ground and
the bottom of the hydrant branch or pipe connection
An aquifer is ________. - ANSWER A water-bearing stratum of rock, sand, or gravel
, the difference between the static level and the pumping level of a well is called
- ANSWER Drawdown
The carrying capacity of water mains is often reduced by ___ - ANSWER tuberculation
When installing service lines, it is a good practice to provide for movement due
to settling by installing a ___ - ANSWER bend or gooseneck in the pipe
The term water table is used in reference to the - ANSWER level to which the soil or
rock voids are saturated with groundwater.
A pneumatic ejector lifts water from low points to higher levels. The device used -
ANSWER
to achieve this is a(n) - ANSWER air compressor.
The subsurface component parts of a well include the - ANSWER well casing.
In determining the purity of a water sample, it is usually tested for the presence of
the coliform organism because - ANSWER its presence indicates the water has been
polluted.
The first time a distribution system water sample comes back marked unsafe,
you should - ANSWER take another sample from the same location.
When a centrifugal pump with new packing is started and the packing seems to leak
air, the proper procedure is to - ANSWER stop the motor and repack the stuffing box.
