Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
Organic chemistry is concerned with compounds containing what element?
2.
What sludge dewatering process is best for alum sludges when the cakes are very dry, filtrate is clear, and solids capture is very high?
3.
Solids contact basins have much shorter detention times than conventional treatment basins.
4.
Every 1.0 mg/L of alum consumes what amount of alkalinity during the formation of floc particles?
5.
What chemical may encourage growth of algae and microorganisms?
6.
What causes water to turn red?
7.
A connection between a potable water system and a non potable water system is?
8.
The fluoride injection point should be located after water has received complete treatment.
9.
What is true about heterotrophic bacteria?
10.
What is a major cause of short circuiting in a sedimentation basin?
11.
The pH scale ranges from?
12.
When the temperature of raw surface water drops significantly the flocculator paddle speed should be?
13.
What is dental fluorosis?
14.
What is the filtration flow rate through a manganese greensand pressure filter at 10 degrees Celsius?
15.
Monthly sampling results must be reported by the water purveyor?
16.
For surface water systems without filtration, the Surface Water Treatment Rule requires public water systems to
17.
The action level for copper is 0.015 mg/L.
18.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
19.
What type of charge do the compounds that form when iron or aluminum salts react with water have?
20.
What does the pulsating energy in a pulsator clarifier help to do?
21.
When soda ash is added to water for softening purposes what will it do?
22.
Determining the pH is an important water quality test because the results indicate?
23.
Direct filtration eliminates what conventional treatment step?
24.
What is the pH of a saturated solution of sodium fluoride?
25.
Wet activated carbon will remove what from the air? (In regards to safety)
