1
Water Distribution 1 Questions with Answers
(100% Correct Answers)
Head is measured in Answer: feet
A plat is Answer: A map
Which type of valve will prevent the collapse of a pipe Answer: Air-and-
vaccume 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? Answer: In the morning
One of chlorines advantages is that it Answer: has a persistent residual
Chlorine gas is _____ times heavier than air. Answer: 2.5
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
, 2
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
How often should the temperature of centrifugal pump motor bearings be
checked with a thermometer? Answer: Once a month
All sensors that respond to liquid pressure will preform poorly if _______ enters
the air sensor Answer: Air
Which agency sets limits on the concentration levels of harmful contaminants
in potable water distributed to costumers? Answer: United States
Environmental Protection Agency
Which violations are most serious? Answer: Tier 1
A positive fecal coliform test must be reported to the primacy agency within 24
hours Answer: 24 hours
Water Distribution 1 Questions with Answers
(100% Correct Answers)
Head is measured in Answer: feet
A plat is Answer: A map
Which type of valve will prevent the collapse of a pipe Answer: Air-and-
vaccume 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? Answer: In the morning
One of chlorines advantages is that it Answer: has a persistent residual
Chlorine gas is _____ times heavier than air. Answer: 2.5
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
, 2
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
How often should the temperature of centrifugal pump motor bearings be
checked with a thermometer? Answer: Once a month
All sensors that respond to liquid pressure will preform poorly if _______ enters
the air sensor Answer: Air
Which agency sets limits on the concentration levels of harmful contaminants
in potable water distributed to costumers? Answer: United States
Environmental Protection Agency
Which violations are most serious? Answer: Tier 1
A positive fecal coliform test must be reported to the primacy agency within 24
hours Answer: 24 hours
