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Water Distribution D2 California Exam
Questions And Answers Practice Questions with
Solutions Newest 2026-2027 | Already Graded A+
Which chemical is most often used to disinfect public water
supplies? - ANSWER-chlorine or chlorine compounds.
The purpose of a surge tank is to - ANSWER-control water
hammer.
The presence of total coliforms in drinking water indicates -
ANSWER-THe potential presence of pathogens.
The term MCL means - ANSWER-maximum contaminant level.
The primary origin of coliforms in water supplies is -
ANSWER-fecal contamination by warm blooded animals.
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The primary source of trihalomethanes (THMs) in drinking
water is - ANSWER-the reaction of chlorine compounds and
organic matter.
An air- gap device is used to - ANSWER-prevent backflow of
nonpotable water into a drinking water supply.
The primary health risk associated with trihalomethanes (THMs)
is - ANSWER-cancer.
The purpose of the fusible plug on a chlorine tank is to -
ANSWER-Prevent the cylinder from exploding at high
temperatures
The primary health risk associated with synthetic organic
compounds (SOCs) is - ANSWER-Cancer
Which is the most accurate statement concerning potable water
lines? - ANSWER-They must never be connected to a
contaminated water source.
Water Distribution D2 California Exam
Questions And Answers Practice Questions with
Solutions Newest 2026-2027 | Already Graded A+
Which chemical is most often used to disinfect public water
supplies? - ANSWER-chlorine or chlorine compounds.
The purpose of a surge tank is to - ANSWER-control water
hammer.
The presence of total coliforms in drinking water indicates -
ANSWER-THe potential presence of pathogens.
The term MCL means - ANSWER-maximum contaminant level.
The primary origin of coliforms in water supplies is -
ANSWER-fecal contamination by warm blooded animals.
, 2|Page
The primary source of trihalomethanes (THMs) in drinking
water is - ANSWER-the reaction of chlorine compounds and
organic matter.
An air- gap device is used to - ANSWER-prevent backflow of
nonpotable water into a drinking water supply.
The primary health risk associated with trihalomethanes (THMs)
is - ANSWER-cancer.
The purpose of the fusible plug on a chlorine tank is to -
ANSWER-Prevent the cylinder from exploding at high
temperatures
The primary health risk associated with synthetic organic
compounds (SOCs) is - ANSWER-Cancer
Which is the most accurate statement concerning potable water
lines? - ANSWER-They must never be connected to a
contaminated water source.
