Drinking Water Treatment Operator
Class 1 Exam Questions and Answers
100% Pass
If a customer complains about the drinking water characteristics, the operator
should record the complaint and... - ANSWER-Investigate immediately
What term is used when a water utility divides its total operating expenses into a
total revenue? - ANSWER-Operating ratio
How often should data, such as flow rate, amount of water treated, dosage of
chemical, and reservoir levels be recorded? - ANSWER-Daily
Under the requirements of the Safe Water Drinking Act, it is the duty of the water
purveyor to deliver potable water of proper quantity only as far as the... -
ANSWER-Consumer's tap inside the home
According to the Safe Drinking Water Act, the basic definition of a public water
supply system is any water system that supplies water for human consumption that
serves.... - ANSWER-15 service connections or over 25 persons for over 60 days a
year
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1
, What agent is responsible for reporting lab results to the regulatory agency? -
ANSWER-Water system owner
What causes water to moves through pores in the soil & rocks? - ANSWER-
Gravity
Disease producing bacteria are called ? - ANSWER-Pathogens
What are the two main causes of hardness in water? - ANSWER-Calcium &
Magnesium
What device measures the flow rate of gases? - ANSWER-Rotameter
Excessive internal pressure, which may be several times the normal operating
pressure and can seriously damage hydropneumatic tanks, valves, and piping
network? - ANSWER-Water Hammer
Most pumps must be primed before startup in order to... - ANSWER-Start the
flow of water
What is the purpose of a check valve? - ANSWER-Act as an automatic shutoff
valve when the pump stops
Which form of hypochlorite is the most dangerous to handle? - ANSWER-
Calcium
What type of fire extinguisher should be used for fires with live electricity present?
- ANSWER-Class C
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 2
Class 1 Exam Questions and Answers
100% Pass
If a customer complains about the drinking water characteristics, the operator
should record the complaint and... - ANSWER-Investigate immediately
What term is used when a water utility divides its total operating expenses into a
total revenue? - ANSWER-Operating ratio
How often should data, such as flow rate, amount of water treated, dosage of
chemical, and reservoir levels be recorded? - ANSWER-Daily
Under the requirements of the Safe Water Drinking Act, it is the duty of the water
purveyor to deliver potable water of proper quantity only as far as the... -
ANSWER-Consumer's tap inside the home
According to the Safe Drinking Water Act, the basic definition of a public water
supply system is any water system that supplies water for human consumption that
serves.... - ANSWER-15 service connections or over 25 persons for over 60 days a
year
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 1
, What agent is responsible for reporting lab results to the regulatory agency? -
ANSWER-Water system owner
What causes water to moves through pores in the soil & rocks? - ANSWER-
Gravity
Disease producing bacteria are called ? - ANSWER-Pathogens
What are the two main causes of hardness in water? - ANSWER-Calcium &
Magnesium
What device measures the flow rate of gases? - ANSWER-Rotameter
Excessive internal pressure, which may be several times the normal operating
pressure and can seriously damage hydropneumatic tanks, valves, and piping
network? - ANSWER-Water Hammer
Most pumps must be primed before startup in order to... - ANSWER-Start the
flow of water
What is the purpose of a check valve? - ANSWER-Act as an automatic shutoff
valve when the pump stops
Which form of hypochlorite is the most dangerous to handle? - ANSWER-
Calcium
What type of fire extinguisher should be used for fires with live electricity present?
- ANSWER-Class C
©️COPYRIGHT 2025, ALL RIGHTS RESERVED. 2
