WATER DISTRIBUTION LEVEL 3
EXAM STUDY GUIDE WITH
ANSWERS
◉ In detecting chlorine gas leaks from the disinfection assembly,
an ammonia soaked rag will produce...
Answer: A dense white vapor
◉ The chlorine concentration in the water distribution system
must be at least...
Answer: 0.2 mg/l for 15 minutes contact
◉ What is the MCL for chlorine?
Answer: 4 mg/l
◉ What federal agency is responsible for rule making and
enforcement of the Safe Drinking Water Act?
Answer: The Environmental Protection Agency
◉ What is a brief safety meeting held around the tailgate of a
truck called?
Answer: A tailgate safety meeting
◉ What is the minimum pressure in a water distribution system?
, Answer: 20 psi
◉ The difference between static level and pumping level in a well
is called...
Answer: Drawdown
◉ Which of the following pumps must never be started until it is
properly primed?
Answer: A Centrifugal Pump
◉ What are small mounds of corrosion that form on the inside of
iron pipe?
Answer: Tubercles
◉ What is the minimum horizontal distance between a water
main and a sanitary sewer main?
Answer: 10ft
◉ In water treatment, the degree of cloudiness in water is
measured by what?
Answer: Turbidity
◉ Hydrogen sulfide in water is undesirable because it...
Answer: Imparts an unacceptable odor
◉ A temporary cloudiness in water is caused by...
EXAM STUDY GUIDE WITH
ANSWERS
◉ In detecting chlorine gas leaks from the disinfection assembly,
an ammonia soaked rag will produce...
Answer: A dense white vapor
◉ The chlorine concentration in the water distribution system
must be at least...
Answer: 0.2 mg/l for 15 minutes contact
◉ What is the MCL for chlorine?
Answer: 4 mg/l
◉ What federal agency is responsible for rule making and
enforcement of the Safe Drinking Water Act?
Answer: The Environmental Protection Agency
◉ What is a brief safety meeting held around the tailgate of a
truck called?
Answer: A tailgate safety meeting
◉ What is the minimum pressure in a water distribution system?
, Answer: 20 psi
◉ The difference between static level and pumping level in a well
is called...
Answer: Drawdown
◉ Which of the following pumps must never be started until it is
properly primed?
Answer: A Centrifugal Pump
◉ What are small mounds of corrosion that form on the inside of
iron pipe?
Answer: Tubercles
◉ What is the minimum horizontal distance between a water
main and a sanitary sewer main?
Answer: 10ft
◉ In water treatment, the degree of cloudiness in water is
measured by what?
Answer: Turbidity
◉ Hydrogen sulfide in water is undesirable because it...
Answer: Imparts an unacceptable odor
◉ A temporary cloudiness in water is caused by...
