CLASS 1 & 2 WATER DISTRIBUTION THEORY
COMPREHENSIVE QUESTIONS AND VERIFIED DETAILED
SOLUTIONS ( MULTIPLE CHOICES) |100% CORRECT!!
80 ug/L Correct Answers What is the MCL for trihalomethane ?
1 mg/L Correct Answers What is the optimum fluoride concentration in
drinking water?
0.3 mg/L, 0.05 mg/L Correct Answers What is the recommended
maximum contaminating level for iron and magnesium?
All valves and hydrants must be disinfected, a minimum of 25 mg/L
residual chlorine after 24 hrs, maintain chlorine contact time for 24 hrs,
and apply a minimum of 50 mg/L of residual chlorine. Correct Answers
AWWA standards for disinfecting water mains recommend these
procedures.
AWWA(American Water Works Association) Correct Answers What
organization prepares standards for materials used in the water works
industry?
Ohio Environmental Protection Agency Correct Answers Ohio revised
Code, Section 6109.07 provides that plans for water mains be approved
by who?
Disinfection Correct Answers Chlorine is added to drinking water for
what purpose?
, 3% Correct Answers According to AWWA, what should the accuracy
range be on a 5/8" x 3/4" water meter tested at an intermediate flow
rate?
Desalinization Correct Answers The process of removing salt from
water is?
Typhoid, Cholera, and dysentery Correct Answers These are all water
born diseases.
DPD Correct Answers The National Primary Interim Drinking Water
Regulations have changed past water works practices by requiring that
chlorine residual analysis be performed by which method?
Aeration Correct Answers The process by which air is added to water to
remove dissolved gasses is called?
Salt Correct Answers The chemical used to regenerate a zeolite softener
is?
To prevent tooth decay Correct Answers Fluoride is added to water for
what purpose?
Alkaline Correct Answers A pH of 8.0 is said to be?
COMPREHENSIVE QUESTIONS AND VERIFIED DETAILED
SOLUTIONS ( MULTIPLE CHOICES) |100% CORRECT!!
80 ug/L Correct Answers What is the MCL for trihalomethane ?
1 mg/L Correct Answers What is the optimum fluoride concentration in
drinking water?
0.3 mg/L, 0.05 mg/L Correct Answers What is the recommended
maximum contaminating level for iron and magnesium?
All valves and hydrants must be disinfected, a minimum of 25 mg/L
residual chlorine after 24 hrs, maintain chlorine contact time for 24 hrs,
and apply a minimum of 50 mg/L of residual chlorine. Correct Answers
AWWA standards for disinfecting water mains recommend these
procedures.
AWWA(American Water Works Association) Correct Answers What
organization prepares standards for materials used in the water works
industry?
Ohio Environmental Protection Agency Correct Answers Ohio revised
Code, Section 6109.07 provides that plans for water mains be approved
by who?
Disinfection Correct Answers Chlorine is added to drinking water for
what purpose?
, 3% Correct Answers According to AWWA, what should the accuracy
range be on a 5/8" x 3/4" water meter tested at an intermediate flow
rate?
Desalinization Correct Answers The process of removing salt from
water is?
Typhoid, Cholera, and dysentery Correct Answers These are all water
born diseases.
DPD Correct Answers The National Primary Interim Drinking Water
Regulations have changed past water works practices by requiring that
chlorine residual analysis be performed by which method?
Aeration Correct Answers The process by which air is added to water to
remove dissolved gasses is called?
Salt Correct Answers The chemical used to regenerate a zeolite softener
is?
To prevent tooth decay Correct Answers Fluoride is added to water for
what purpose?
Alkaline Correct Answers A pH of 8.0 is said to be?
