Welcome to the Water Distribution Operator Practice Test.
Choose the best possible answer to the question.
1.
Velocity of flow in water mains is usually expressed in?
2.
What is used as an indicator to determine possible contamination in the drinking water?
3.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
4.
How many Milliliters (ml) are in 1 gallon of water?
5.
What is an example of Tier III violation.
6.
What two chemicals cause water hardness?
7.
Hard water scale is usually caused by?
8.
The water level below the normal level that persists after a well pump has been off for a period of time is?
10.
Photosynthesis is a biochemical process in which
11.
A 1 ton cylinder filled with chlorine weighs approximately?
12.
What is the ideal indicator for pathogens in the drinking water supply?
13.
If a coupon loses weight what tendencies does the water have?
14.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
15.
What will a flexible diaphragm coupling compensate for in angular movement?
16.
Push on Joints are unpopular and can not be assembled in the field.
17.
What should be determined first when designing a water pump station?
18.
What is the most common type of centrifugal pumps?
19.
Chlorine gas is how many times denser than air?
20.
Fire demand can account for what percentage of total capacity of a storage system?
21.
When digging a trench to install or repair a water main, where does the soil go?
22.
What is the most common water complaint?
23.
The limnetic zone of a lake is?
24.
What type of map should not overlap each other?
25.
What type of valve is used to control the level in a water tank?
