Welcome to the Water Treatment Operator Practice Test.
Choose the best possible answer to the question.
1.
The action level for copper is 0.015 mg/L.
2.
Most regulated contaminants in drinking water?
3.
The Zeta Protentional measures the number of excess what found on the surface of all particular matter?
4.
What chemicals are used to substitute chlorine as pre-oxidants to minimize the formation of disinfection byproducts in a water plant?
5.
Gravity filters should not use more than what percent of daily production for backwash?
6.
Backwashing rate procedures should be reassessed to determine the cause of granular activated carbon loss if?
7.
What oxidant should be fed as early as possible in the treatment process to allow for complete reaction before it enters the distribution system?
8.
What should be determined first before an in ground sedimentation tank is drained?
9.
If the chlorine demand suddenly increases from 0.4 mg/L to 2.8 mg/L, what could be the reason?
10.
What is true about heterotrophic bacteria?
11.
What is the most favorable raw water condition for good flocculation?
12.
How much carbon is approximately lost during the reactivation process for granular activated carbon?
13.
Reaching breakpoint chlorination means?
14.
Acid rain is caused by
15.
What is the pH of a saturated solution of sodium fluoride?
16.
If the water temperature decreases this will cause the disinfection action of chlorine to?
17.
What is recarbonation?
18.
The maximum safe level of electrical current that will not have any long lasting health effects is?
19.
When it is dissolved in water for disinfection purposes, how long does ozone last?
20.
The marble test is used to determine if water is saturated with calcium carbonate and has what other general use?
21.
The loss of chloramine residuals in a water line or a storage tank is due to?
22.
What precipitates can foul a cation exchange resin?
23.
The maximum sustained flow possible from a well mostly depends on?
24.
With coagulation reactions when alum is used, the specific insoluble floc formed is a precipitate of?
25.
Chlorine gas ton cylinders include two feed line connections. One is an upper and one is a lower that is designed to?
