WATER DISTRIBUTION EXAM
QUESTIONS AND ANSWERS
What is the most common means of disinfecting drinking water used today to protect
the public's health? - Answer-Chlorination
Why do surface waters require treatment? - Answer-To remove, kill, or inactivate
disease causing organisms
What do turbidity units measure? - Answer-The cloudiness of water
What is the MAIN purpose of a water storage facility? - Answer-To provide sufficient
supply of water to average daily demands on the water supply system
When is the best time to take a storage tank out of service? - Answer-When
consumption is lowest
Gauges are commonly used on which side of a pump? - Answer-Discharge side
A condition which atmospheric or dissolved molecular oxygen is present in the aquatic
environment is called - Answer-Aerobic
What is palatable water - Answer-Pleasing to the senses (tastes, odors, colors, and
turbidity)
All trenches must be effectively shored at ____ ft. or deeper - Answer-5ft
OSHA defines____________ as a person capable of identifying existing hazards in the
surroundings, or working conditions which are unsanitary, hazardous or dangerous to
employees, and who has authorization to take prompt corrective measures to eliminate
the hazards. - Answer-Competent person
The U.S. National Primary Drinking Water Regulations is regulated at which level -
Answer-Federal
What is the absolute minimum pressure a water main should be taken down to before a
boil water advisory is issued? - Answer-20 psi
QUESTIONS AND ANSWERS
What is the most common means of disinfecting drinking water used today to protect
the public's health? - Answer-Chlorination
Why do surface waters require treatment? - Answer-To remove, kill, or inactivate
disease causing organisms
What do turbidity units measure? - Answer-The cloudiness of water
What is the MAIN purpose of a water storage facility? - Answer-To provide sufficient
supply of water to average daily demands on the water supply system
When is the best time to take a storage tank out of service? - Answer-When
consumption is lowest
Gauges are commonly used on which side of a pump? - Answer-Discharge side
A condition which atmospheric or dissolved molecular oxygen is present in the aquatic
environment is called - Answer-Aerobic
What is palatable water - Answer-Pleasing to the senses (tastes, odors, colors, and
turbidity)
All trenches must be effectively shored at ____ ft. or deeper - Answer-5ft
OSHA defines____________ as a person capable of identifying existing hazards in the
surroundings, or working conditions which are unsanitary, hazardous or dangerous to
employees, and who has authorization to take prompt corrective measures to eliminate
the hazards. - Answer-Competent person
The U.S. National Primary Drinking Water Regulations is regulated at which level -
Answer-Federal
What is the absolute minimum pressure a water main should be taken down to before a
boil water advisory is issued? - Answer-20 psi
