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California D2 Water Distribution Operator Exam & Grade 2 Certification Practice Questions and Answershttps://www.stuvia.com/user/edupac
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California D2 Water
Distribution Operator Exam
& Grade 2 Certification
Practice Questions and
Answers
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D2 - Water Distribution Operator Exam (California)https://www.stuvia.com/user/edupac
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D2 - Water Distribution Operator Exam (California)
Study online at https://quizlet.com/_8ha8gc
1. three sources of supply Surface water treatment plants, Import/Purchased water, and
Wells.
2. Transmission Main A very large main designed to move water from one part of
the system to another.
3. Shut-Off Valve A type of valve the water company uses when they need to
turn water off to a particular consumer.
4. Where is a Shut-Off Valve typi- Usually found connected to a consumer's meter.
cally located?
5. Why might a water company Because of a request to connect or disconnect, for repairs, or
need to shut water off to a par- as a result of non payment.
ticular consumer?
6. two most common types of Curb stop & Angle stop.
Shut-Off Valves
7. Meters Devices used to read consumer usage.
8. where does a water compa- At the consumer's meter.
ny's property end
9. most common type of residen- Positive displacement meters, because they accurately mea-
tial water meter and why? sure all water that flows through them.
10. three types of water systems Arterial loop, Grid, and Tree.
11. minimum acceptable PSI with 20 PSI
a system
12. normal acceptable range of 35 to 65 PSI
PSI within a system
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D2 - Water Distribution Operator Exam (California)https://www.stuvia.com/user/edupac
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D2 - Water Distribution Operator Exam (California)
Study online at https://quizlet.com/_8ha8gc
13. When must a pressure regu- GREATER than 80 PSI.
lator be installed on a con-
sumer's service line?
14. What is the highest acceptable 80 PSI
PSI within a system, before a
pressure regulator needs to
be installed?
15. Why are higher pressures gen- It can damage plumbing fixtures.
erally not desired within a sys-
tem?
16. Dynamic Pressure The pressure within a system when water is moving.
17. six types of pipe found in a wa- Ductile Iron, Concrete, Steel, Asbestos Cement, Plastic and
ter distribution system Gray Cast Iron.
18. C-Value The measure of interior smoothness within a pipe.
19. What does a 140+ C-Value Very smooth interior surface of a pipe (Plastic, AC, Concrete)
mean?
20. What does a <100 C-Value Very bad interior surface of a pipe (Tuburculated old cast iron)
mean?
21. What is a Pnetrometer? A tool for measuring the compressive strength of soil.
22. What is a Competent Person? An individual with excavation knowledge and training who is
in charge of an excavation job, and who has the power to start
work in the event of a hazard
23. When is shoring generally re- When a trench is 5' or more in depth, or hazardous soil
quired? conditions exist.
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California D2 Water Distribution Operator Exam & Grade 2 Certification Practice Questions and Answershttps://www.stuvia.com/user/edupac
https://www.stuvia.com/user/edupac
https://www.stuvia.com/user/edupachttps://www.stuvia.com/usehttps://www.stuvia.com/user/
edupacr/edupac
California D2 Water
Distribution Operator Exam
& Grade 2 Certification
Practice Questions and
Answers
https://www.stuvia.com/user/edupac
https://www.stuvia.com/user/edupachttps://www.stuvia.com/uhttps://www.stuvia.com/user/
edupacser/edupac
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, https://www.stuvia.com/user/edupac
D2 - Water Distribution Operator Exam (California)https://www.stuvia.com/user/edupac
https://www.stuvia.com/user/edupac
D2 - Water Distribution Operator Exam (California)
Study online at https://quizlet.com/_8ha8gc
1. three sources of supply Surface water treatment plants, Import/Purchased water, and
Wells.
2. Transmission Main A very large main designed to move water from one part of
the system to another.
3. Shut-Off Valve A type of valve the water company uses when they need to
turn water off to a particular consumer.
4. Where is a Shut-Off Valve typi- Usually found connected to a consumer's meter.
cally located?
5. Why might a water company Because of a request to connect or disconnect, for repairs, or
need to shut water off to a par- as a result of non payment.
ticular consumer?
6. two most common types of Curb stop & Angle stop.
Shut-Off Valves
7. Meters Devices used to read consumer usage.
8. where does a water compa- At the consumer's meter.
ny's property end
9. most common type of residen- Positive displacement meters, because they accurately mea-
tial water meter and why? sure all water that flows through them.
10. three types of water systems Arterial loop, Grid, and Tree.
11. minimum acceptable PSI with 20 PSI
a system
12. normal acceptable range of 35 to 65 PSI
PSI within a system
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, https://www.stuvia.com/user/edupac
D2 - Water Distribution Operator Exam (California)https://www.stuvia.com/user/edupac
https://www.stuvia.com/user/edupac
D2 - Water Distribution Operator Exam (California)
Study online at https://quizlet.com/_8ha8gc
13. When must a pressure regu- GREATER than 80 PSI.
lator be installed on a con-
sumer's service line?
14. What is the highest acceptable 80 PSI
PSI within a system, before a
pressure regulator needs to
be installed?
15. Why are higher pressures gen- It can damage plumbing fixtures.
erally not desired within a sys-
tem?
16. Dynamic Pressure The pressure within a system when water is moving.
17. six types of pipe found in a wa- Ductile Iron, Concrete, Steel, Asbestos Cement, Plastic and
ter distribution system Gray Cast Iron.
18. C-Value The measure of interior smoothness within a pipe.
19. What does a 140+ C-Value Very smooth interior surface of a pipe (Plastic, AC, Concrete)
mean?
20. What does a <100 C-Value Very bad interior surface of a pipe (Tuburculated old cast iron)
mean?
21. What is a Pnetrometer? A tool for measuring the compressive strength of soil.
22. What is a Competent Person? An individual with excavation knowledge and training who is
in charge of an excavation job, and who has the power to start
work in the event of a hazard
23. When is shoring generally re- When a trench is 5' or more in depth, or hazardous soil
quired? conditions exist.
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