Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
The Surface Water Treatment Rule states that multibarrier treatment must result in the inactivation of Giardia cysts and viruses by?
2.
In a thermally stratified reservoir, water located beneath the thermocline may?
3.
What type of sedimentation basins have the flow of water admitted at an angle?
4.
Why are polyphosphates used in drinking water?
5.
How much carbon is approximately lost during the reactivation process for granular activated carbon?
6.
Which is the most persistent protozoa?
7.
What would have the least impact on the efficiency of copper sulfate?
8.
What are the precursors to THMs?
9.
The outlet of a forced ventilation system for a chlorinator room she be located?
10.
What zone in a lake or reservoir has weeds that grow underwater that may cause taste & odor complaints?
11.
The upper surface of the zone of saturation of ground water in an unconfined aquifer is called the?
12.
The more hydrogen ions
13.
What form is Giardia most infectious?
14.
What will increase alkalinity, pH, and hardness?
15.
Most totalizer meters at treatment plants are commonly
16.
What type of polymers are sometimes formulated with regulated substances?
17.
In a permit entry confined space, who is responsible for terminating entries?
18.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
19.
The IDLH (immediately dangerous to life and health) value for chlorine is?
20.
A sedimentation basin with mechanical sludge removal equipment should be drained and inspected?
21.
The size of Giardia in the trophozoite stage is approximately?
22.
What gasket is the best to use when connecting a chlorine cylinder or container to the chlorine feed system?
23.
Which of the following illnesses is it hardest to kill the organism that causes the illness?
24.
What is the best addition for water that is highly colored due to organic matter?
25.
What oxidant should be fed as early as possible in the treatment process to allow for complete reaction before it enters the distribution system?
