Welcome to the Water Distribution Operator Practice Test.
Choose the best possible answer to the question.
1.
Records of turbidity analysis must be kept for at least?
2.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
4.
What is the C-Value of a newly installed PVC pipe?
5.
How often should chlorine supply lines be replaced?
6.
A measurement of the interior roughness of a pipe is?
7.
The amount of oxygen that can remain dissolved in water is related to?
8.
What device changes the alternating current to direct current by allowing the electric current to flow in one direction but blocks flow in the opposite direction?
9.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
10.
Total dynamic head against which a pump must operate is?
11.
An underground geological water bearing formation is?
12.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
13.
Material Safety Data Sheets (MSDS) are required for?
15.
Identify which is a Cross-Connection hazard in a drinking water system.
16.
Velocity of flow in water mains is usually expressed in?
17.
You have a new gasoline powered diaphragm pump and are using heavy-duty spiral wire reinforced suction hose. What is the practical maximum height at which to set the pump above the water level?
18.
What will a flexible diaphragm coupling compensate for in angular movement?
19.
The two types of pump seals are?
20.
What characteristic of water is a chemical characteristic?
21.
Shoring is required in any excavation that is?
22.
When a water sample is collected, what causes the quality of the sample to begin to change?
23.
High levels of Iron & Manganese in the drinking water will cause?
24.
The most probable cause for a pinging sound coming from a water pump is?
25.
What type of valve dampens water hammer?
