Welcome to the Water Distribution Operator Practice Test.
Choose the best possible answer to the question.
1.
The frequent starting of distribution pumps is a possible indication of?
2.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
3.
In an excavation a ladder must be placed within how many feet of every person in the trench?
4.
What type of meter is usually 2" and under and sensitive to low flow rates?
5.
Dead end water mains should be flushed?
6.
If a bac-T sample comes back positive, the water supplier needs to?
7.
A competent person must inspect excavations continuously while workers are in the excavation.
8.
The breaking of a buried pipe when it is unevenly supported is called?
9.
When a water main needs to be depressurized is must be what?
10.
Water contaminated with Haloacetic Acids (haa5) may cause?
11.
Spontaneous combustion can occur when chlorine is mixed with?
12.
If an operator has a problem achieving adequate disinfection, a possible cause is?
13.
A major break in a water main can assist the distribution operator to
14.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
15.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
16.
Centrifugal force is generated?
17.
Ideally, water mains should be flushed at what rate?
18.
What type of map provides a clear picture of the entire water distribution system?
19.
Total dynamic head against which a pump must operate is?
20.
If a water system changes its disinfection sampling point, disinfection type, precess, or any other modifications identified by the State, it must?
22.
Yellow hydrant body with an orange cap signals?
23.
What water quality report must the water supplier provide to its consumers every year?
24.
How high can a perfect vacuum lift water at sea level?
25.
What is the ideal indicator for pathogens in the drinking water supply?
