WATER DISTRIBUTION 1 EXAM
SCRIPT TESTED QUESTIONS
VERIFIED SOLUTIONS
⩥ 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
⩥ 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
SCRIPT TESTED QUESTIONS
VERIFIED SOLUTIONS
⩥ 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
⩥ 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
