WATER DISTRIBUTION
CERTIFICATION EXAMINATION
REVIEW TESTED QUESTIONS
ACCURATE SOLUTIONS
◉ Which type of valve will prevent the collapse of a pipe. Answer: Air-
and-vacuum relief valve
◉ The highest degree of protection of a coated steel pipe is..... Answer:
cathodic protection
◉ At which time of day is the age of the water stored in the distribution
system the highest/oldest?. Answer: In the morning
◉ One of chlorine advantages is that it. Answer: has a persistent residual
◉ Chlorine gas is _____ times heavier than air.. Answer: 2.5X
,◉ After a water storage tank has been chlorinated, which bacteriological
test must prove negative before the tank is put back into service..
Answer: Coliform test
◉ ~~~~~~Which is the best and most reliable way of finding a very
small chlorine leak?. Answer: Use a chlorine gas detector and place it
near any area suspected of leaking.
◉ The minimum required free chlorine residual anywhere in the
distribution system is. Answer: a detectable level
◉ First draw samples for the analysis of lead and copper water must be
collected from taps where the water has stood motionless in the
plumbing for at least. Answer: 6 hours
◉ Samples collected for cloakrooms are collected in plastic bottles that
must contain. Answer: Sodium thiosulfate
◉ The volume of a sample for coliform compliance is. Answer: 100 ml
◉ If a water sample is not analyzed immediately for chlorine residual, it
is acceptable to be analyzed within. Answer: 15 minutes
, ◉ The heart of a pump is called the. Answer: impeller
◉ Which device serves the same function as the packing. Answer:
Mechanical seal
◉ Which is used to stop air leakage into the casing around the pump
shaft. Answer: seals
◉ Which is at the top of a stuffing box?. Answer: Packing gland
◉ Which assembly holds the lantern ring and packing?. Answer:
Stuffing box
◉ Why is it important to monitor the speed of a variable speed pump?.
Answer: To prevent cavitation from occurring
◉ ~~~Which basic electrical unit is used to measure a materials
opposition of flow of electricity?. Answer: Ohm
◉ The first oil change on a pump should be done. Answer: After a
month of operation
CERTIFICATION EXAMINATION
REVIEW TESTED QUESTIONS
ACCURATE SOLUTIONS
◉ Which type of valve will prevent the collapse of a pipe. Answer: Air-
and-vacuum relief valve
◉ The highest degree of protection of a coated steel pipe is..... Answer:
cathodic protection
◉ At which time of day is the age of the water stored in the distribution
system the highest/oldest?. Answer: In the morning
◉ One of chlorine advantages is that it. Answer: has a persistent residual
◉ Chlorine gas is _____ times heavier than air.. Answer: 2.5X
,◉ After a water storage tank has been chlorinated, which bacteriological
test must prove negative before the tank is put back into service..
Answer: Coliform test
◉ ~~~~~~Which is the best and most reliable way of finding a very
small chlorine leak?. Answer: Use a chlorine gas detector and place it
near any area suspected of leaking.
◉ The minimum required free chlorine residual anywhere in the
distribution system is. Answer: a detectable level
◉ First draw samples for the analysis of lead and copper water must be
collected from taps where the water has stood motionless in the
plumbing for at least. Answer: 6 hours
◉ Samples collected for cloakrooms are collected in plastic bottles that
must contain. Answer: Sodium thiosulfate
◉ The volume of a sample for coliform compliance is. Answer: 100 ml
◉ If a water sample is not analyzed immediately for chlorine residual, it
is acceptable to be analyzed within. Answer: 15 minutes
, ◉ The heart of a pump is called the. Answer: impeller
◉ Which device serves the same function as the packing. Answer:
Mechanical seal
◉ Which is used to stop air leakage into the casing around the pump
shaft. Answer: seals
◉ Which is at the top of a stuffing box?. Answer: Packing gland
◉ Which assembly holds the lantern ring and packing?. Answer:
Stuffing box
◉ Why is it important to monitor the speed of a variable speed pump?.
Answer: To prevent cavitation from occurring
◉ ~~~Which basic electrical unit is used to measure a materials
opposition of flow of electricity?. Answer: Ohm
◉ The first oil change on a pump should be done. Answer: After a
month of operation
