Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
What occurs in raw water as the level of ammonia decreases?
2.
What is the best process for sequestering manganese?
3.
To regenerate virgin greensand it must be soaked in the filter bed for several hours in a solution of chlorine containing?
4.
How often should the solids concentration be determined in solid contact basins with fairly constant water quality parameters?
5.
What is the main problem if particle agglomeration is occurring in a filter for iron and manganese removal at the interface of the coal layer below?
6.
The ion exchange process usually is used to remove what from water?
7.
Where do Enteropathogenic organisms in water supplies originate?
8.
Reaching breakpoint chlorination means?
9.
Pulsator clarifiers are used to?
10.
The backwash rate must be high enough to?
11.
What agency should be called for actual hands on assistance if a substantial chlorine leak incident occurs?
12.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
13.
When 0.3 mg/L chlorine is added to water, the residual will increase by 0.3 mg/L.
14.
A common chemical added to boost alkalinity is?
15.
When should polyphosphates used for sequestration of iron and manganese from a well be injected?
16.
What is the specific gravity standard for gases?
17.
The type of filter that provides the lowest flow per square foot of surface are is?
18.
If the continuous monitoring of the residual disinfectant concentration of the water entering the water system fails, how often will an operator need to collect a grab sample until the problem is fixed?
19.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
20.
The treatment process that controls corrosion or scaling is known as?
21.
If adequate surface area and detention time is provided in the sedimentation basin, what would the expected solids removal efficiency level be?
22.
The proper emergency kit for a TON chlorine cylinder is?
23.
One of the steps taken to determine the threshold odor number is?
24.
What does total alkalinity refer to?
25.
According to the AWWA, at 0.1 NTUs filtration can remove what percent of giardia cyts?
