Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
Trihalomethanes (THM's) are primarily a concern in?
2.
What is dissolved air flotation good for removing?
3.
As CaCO3 how much alkalinity will dry-basis alum consume?
4.
Direct filtration eliminates what conventional treatment step?
5.
What would be the short term goal when a water source is destroyed or damaged by some type of disaster that causes total contamination?
6.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
7.
Nitrification in the distribution system can best be described as?
8.
The chlorine demand with vary with?
9.
The proper emergency kit for a TON chlorine cylinder is?
10.
What are total dissolved minerals in rainwater typically close to?
11.
An organic particle that is stabilized by attracting a layer of water molecules to its surface is known as a?
12.
What will accurately measure 500mL solution?
13.
What color will the water sample change when using amperometric titrator to check the chlorine residual?
14.
What chemical is slacked lime?
15.
What adjustments will the operator of a surface water treatment plant have to make if the raw water is very high in turbidity levels?
16.
Chlorine is chosen over chloramines because chlorine?
17.
If the chlorine demand suddenly increases from 0.4 mg/L to 2.8 mg/L, what could be the reason?
18.
Floc is produced when there is a chemical reaction between the coagulant and alkalinity. If the alkalinity of raw water is too low the floc formation will be poor. Some form of alkalinity must be added if the amount that is naturally found in the water source is less than?
19.
Which is the strongest disinfectant?
20.
Why do mud balls and hard spots develop in high rate gravity filters during the summer months?
21.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
22.
Acid rain is caused by
23.
The process by which water becomes a gas and rises is called?
24.
If adequate surface area and detention time is provided in the sedimentation basin, what would the expected solids removal efficiency level be?
25.
A 50% solution of caustic soda will begin to crystallize if the temperature drops below?
