Water Distribution 1(2025 LATEST UPDATE)
Questions and Well detailed Answers 100% Correct
Head is measured in -CORRECTANSWER height (feet) or pressure
Which type of valve will prevent the collapse of a pipe -CORRECTANSWER Air-and-
vacuum relief valve
The highest degree of protection of a coated steel pipe is.... -CORRECTANSWER
cathodic protection
At which time of day is the age of the water stored in the distribution system the
highest/oldest? -CORRECTANSWER In the morning
One of chlorine advantages is that it -CORRECTANSWER has a persistent residual
Chlorine gas is _____ times heavier than air. -CORRECTANSWER 2.5X
After a water storage tank has been chlorinated, which bacteriological test must prove
negative before the tank is put back into service. -CORRECTANSWER Coliform test
,~~~~~~Which is the best and most reliable way of finding a very small chlorine leak? -
CORRECTANSWER 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 -
CORRECTANSWER 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 -
CORRECTANSWER 6 hours
Samples collected for cloakrooms are collected in plastic bottles that must contain -
CORRECTANSWER Sodium thiosulfate
The volume of a sample for coliform compliance is -CORRECTANSWER 100 ml
If a water sample is not analyzed immediately for chlorine residual, it is acceptable to be
analyzed within -CORRECTANSWER 15 minutes
The heart of a pump is called the -CORRECTANSWER impeller
Which device serves the same function as the packing -CORRECTANSWER
Mechanical seal
, Which is used to stop air leakage into the casing around the pump shaft -
CORRECTANSWER seals
Which is at the top of a stuffing box? -CORRECTANSWER Packing gland
Which assembly holds the lantern ring and packing? -CORRECTANSWER Stuffing box
Why is it important to monitor the speed of a variable speed pump? -
CORRECTANSWER To prevent cavitation from occurring
~~~Which basic electrical unit is used to measure a materials opposition of flow of
electricity? -CORRECTANSWER Ohm
The first oil change on a pump should be done -CORRECTANSWER After a month of
operation
How often should the temperature of centrifugal pump motor bearings be checked with
a thermometer? -CORRECTANSWER Once a month
~~~~All sensors that respond to liquid pressure will preform poorly if _______ enters
the air sensor -CORRECTANSWER Air
Questions and Well detailed Answers 100% Correct
Head is measured in -CORRECTANSWER height (feet) or pressure
Which type of valve will prevent the collapse of a pipe -CORRECTANSWER Air-and-
vacuum relief valve
The highest degree of protection of a coated steel pipe is.... -CORRECTANSWER
cathodic protection
At which time of day is the age of the water stored in the distribution system the
highest/oldest? -CORRECTANSWER In the morning
One of chlorine advantages is that it -CORRECTANSWER has a persistent residual
Chlorine gas is _____ times heavier than air. -CORRECTANSWER 2.5X
After a water storage tank has been chlorinated, which bacteriological test must prove
negative before the tank is put back into service. -CORRECTANSWER Coliform test
,~~~~~~Which is the best and most reliable way of finding a very small chlorine leak? -
CORRECTANSWER 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 -
CORRECTANSWER 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 -
CORRECTANSWER 6 hours
Samples collected for cloakrooms are collected in plastic bottles that must contain -
CORRECTANSWER Sodium thiosulfate
The volume of a sample for coliform compliance is -CORRECTANSWER 100 ml
If a water sample is not analyzed immediately for chlorine residual, it is acceptable to be
analyzed within -CORRECTANSWER 15 minutes
The heart of a pump is called the -CORRECTANSWER impeller
Which device serves the same function as the packing -CORRECTANSWER
Mechanical seal
, Which is used to stop air leakage into the casing around the pump shaft -
CORRECTANSWER seals
Which is at the top of a stuffing box? -CORRECTANSWER Packing gland
Which assembly holds the lantern ring and packing? -CORRECTANSWER Stuffing box
Why is it important to monitor the speed of a variable speed pump? -
CORRECTANSWER To prevent cavitation from occurring
~~~Which basic electrical unit is used to measure a materials opposition of flow of
electricity? -CORRECTANSWER Ohm
The first oil change on a pump should be done -CORRECTANSWER After a month of
operation
How often should the temperature of centrifugal pump motor bearings be checked with
a thermometer? -CORRECTANSWER Once a month
~~~~All sensors that respond to liquid pressure will preform poorly if _______ enters
the air sensor -CORRECTANSWER Air
