WATER DISTRIBUTION PRACTICE 240
COMPREHENSIVE TEST PAPER QUESTIONS
AND SOLUTIONS GRADED A+
◉ Which one of the following is correct concerning elevated tanks?
Answer: Eliminate the need for continuous pumping.
◉ Pump stations are not always located in the same place as the
storage facility. Under these conditions, a signal must be transmitted
from the storage facility to the pump or pumps. Also some type of
indicator showing the level of water in the storage facility to the
pump or pumps. Also some type of indicator showing the level of
water in the storage facility is desirable at the pump station.
________________ sensors are available that can measure the actual
water surface level and start or stop a pump. Calibration of these
devices consists of dialing a set point to the desired start or stop
water surface level for a pump.
Answer: Solid state electronic.
◉ A water storage tank interior coating will generally protect the
interior for approximately how many years?
Answer: 3-5 years.
, ◉ How far above ground does a Double Check Back-flow assembly
need to be installed?
Answer: 12 inches.
◉ Atmospheric and pressure vacuum breakers are usually found on?
Answer: Irrigation systems
◉ Which back-flow device/assembly/method is to be used that
ensures the greatest degree of back-flow protection?
Answer: Air Gap.
◉ What is the difference between a reduced pressure principle back-
flow assembly and a double check back-flow assembly?
Answer: The RP has a relief valve.
◉ What is the maximum time period between having a certified
back-flow tester test your back-flow assemblies or devices?
Answer: 1 year.
◉ A back-siphonage condition will most likely be the cause of?
Answer: Reduced pressure or negative pressure on the service or
supply side.
COMPREHENSIVE TEST PAPER QUESTIONS
AND SOLUTIONS GRADED A+
◉ Which one of the following is correct concerning elevated tanks?
Answer: Eliminate the need for continuous pumping.
◉ Pump stations are not always located in the same place as the
storage facility. Under these conditions, a signal must be transmitted
from the storage facility to the pump or pumps. Also some type of
indicator showing the level of water in the storage facility to the
pump or pumps. Also some type of indicator showing the level of
water in the storage facility is desirable at the pump station.
________________ sensors are available that can measure the actual
water surface level and start or stop a pump. Calibration of these
devices consists of dialing a set point to the desired start or stop
water surface level for a pump.
Answer: Solid state electronic.
◉ A water storage tank interior coating will generally protect the
interior for approximately how many years?
Answer: 3-5 years.
, ◉ How far above ground does a Double Check Back-flow assembly
need to be installed?
Answer: 12 inches.
◉ Atmospheric and pressure vacuum breakers are usually found on?
Answer: Irrigation systems
◉ Which back-flow device/assembly/method is to be used that
ensures the greatest degree of back-flow protection?
Answer: Air Gap.
◉ What is the difference between a reduced pressure principle back-
flow assembly and a double check back-flow assembly?
Answer: The RP has a relief valve.
◉ What is the maximum time period between having a certified
back-flow tester test your back-flow assemblies or devices?
Answer: 1 year.
◉ A back-siphonage condition will most likely be the cause of?
Answer: Reduced pressure or negative pressure on the service or
supply side.
