Quiz On CA Water Treatment Plant Operator

26 Questions | By PaulMJr | Last updated: Mar 22, 2022 | Total Attempts: 3451

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Quiz On CA Water Treatment Plant Operator - Quiz

Please take this quiz and check how well do you know about CA water treatment plant operator!

Questions and Answers

1.

Chlorine disinfects water much slower at a pH around 7.0 than at a pH over 8.0.
- A.
  
  True
- B.
  
  False
2.

Excessive turbidity will greatly increase the efficiency of the disinfecting chemical or process.
- A.
  
  True
- B.
  
  False
3.

Organics found in the water can consume great amounts of disinfectants while forming unwanted compounds.
- A.
  
  True
- B.
  
  False
4.

The demand for chlorine by reducing agents must be satisfied before chlorine becomes available to accomplish disinfection.
- A.
  
  True
- B.
  
  False
5.

Chlorine by itself is nonflammable and nonexplosive, but it will support combustion.
- A.
  
  True
- B.
  
  False
6.

The chlorine ion has no disinfecting power and produces no chlorine residual.
- A.
  
  True
- B.
  
  False
7.

The use of hypochlorite to treat potable water achieves the same result as chlorine gas.
- A.
  
  True
- B.
  
  False
8.

Public water supplies are normally chlorinated up to the breakpoint.
- A.
  
  True
- B.
  
  False
9.

Ammonia must be present to produce the breakpoint chlorination curve from the addition of chlorine.
- A.
  
  True
- B.
  
  False
10.

For extremely clean source waters, there may be virtually no Giardia or viruses and achieving 3-log or 4-log inactivation levels will be impossible and not necessary.
- A.
  
  True
- B.
  
  False
11.

Plastic containers are commonly used for storage of chlorine gas.
- A.
  
  True
- B.
  
  False
12.

When chlorine gas condenses to liquid (reliquifies), the liquid chlorine may plug the chlorine supply lines.
- A.
  
  True
- B.
  
  False
13.

When operating a hypochlorinator; you should compare the actual chlorine dose applied to the water being treated with the desired chlorine dose in milligrams per liter.
- A.
  
  True
- B.
  
  False
14.

When looking for a chlorine leak, never apply ammonia solutions directly to any valve because an acid will form that will eat away the valve fittings.
- A.
  
  True
- B.
  
  False
15.

Very often when consumers complain about chlorine tastes in their drinking water, the chlorine dose has been inadequate.
- A.
  
  True
- B.
  
  False
16.

Sodium chlorite is very combustible around organic compounds.
- A.
  
  True
- B.
  
  False
17.

Chlorine is a gas that is 2.5 times lighter than air.
- A.
  
  True
- B.
  
  False
18.

Hypochlorite is much more hazardous than gaseous chlorine.
- A.
  
  True
- B.
  
  False
19.

All lamps within an ultraviolet (UV) system are identical (type, length, diameter, power, and output).
- A.
  
  True
- B.
  
  False
20.

Maintenance on ultraviolet (UV) systems requires cleaning the quartz sleeves and changing the lamps.
- A.
  
  True
- B.
  
  False
21.

Ozone is normally generated on site because it is very unstable and decomposes to elemental oxygen in a short time after generation.
- A.
  
  True
- B.
  
  False
22.

Why are there very few natural waters that are safe to drink without treatment of some kind?
- A.
  
  Because of advances in the field of pollution detection technology.
- B.
  
  Because of population growth and related pollution of waters.
- C.
  
  Because of the excessive demands on operators' time, which have prevented adequate O & M.
- D.
  
  Because of the lack of maintenance and deterioration of treatment equipment.
23.

What is the chlorine demand?
- A.
  
  The amount of chlorine needed to satisfy the chlorine demand and the amount of chlorine residual needed for disinfection.
- B.
  
  The amount of chlorine sufficient to kill the microorganisms present in the water supply
- C.
  
  The amount of chlorine that reacts with the organic and inorganic materials in water.
- D.
  
  The total amount of all compounds with disinfecting properties plus any remaining free (uncombined) chlorine.
24.

How can the formation of suspected carcinogenic compounds (trihalomethanes) be prevented as a result of the chemical reactions that take place between organic materials and chlorine?
- A.
  
  By limiting the amount of prechlorination and by removing the organic materials prior to chlorination.
- B.
  
  By neutralizing the formation of carcinogenic compounds.
- C.
  
  By removing any doubt or suspicion about the chemical reactions.
- D.
  
  By revealing the direction of the chemical reactions.
25.

What is breakpoint chlorination?
- A.
  
  Addition of chlorine to water until the chlorine demand has been satisfied.
- B.
  
  Compounds formed by the reaction of hypochlorous acid (or aqueous chlorine) with ammonia.
- C.
  
  Organic compounds combined with chlorine.
- D.
  
  Phenolic compounds (carbolic acids) combined with chlorine.