BASIC WASTEWATER OPERATOR PRACTICE EXAM CLASS

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BASIC WASTEWATER OPERATOR PRACTICE EXAM CLASS

3 Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -100 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Production of Volatile Acids

Answer:

What causes the pH to decrease during the anaerobic digestion process?

Question 2: Waste more sludge

Answer:

What should be done when the bio-reactor in an SBR plant is organically overloaded?

Question 3: Oil & Grease

Answer:

Which of the following can be analyzed using composite samples?

Question 4: Normal operation

Answer:

When you install a new packing gland, you notice that there is a slow, steady stream of water coming out of the packing area. What is this an indication of?

Question 5: With a chemical absorbent

Answer:

What is the best way to clean up a polymer spill?

Question 6: H2SO4

Answer:

What is the chemical formula for sulfuric acid?

Question 7: Flush with cold water for 15 minutes

Answer:

What is First-Aid for someone getting chlorine gas in their eyes?

Question 8: Plug valve

Answer:

If you have a lime slurry feed line, what is the best valve to use?

Question 9: Heavier than air

Answer:

Chlorine gas is what?Question 10: Decrease the lag time for pump operation by moving the floats closer together

Answer:

The influent to the treatment plant is septic. It is determined that it is coming from a lift station upstream from the plant. What should the operator do?

Question 11: Stalked ciliates

Answer:

What is the predominant organism in a healthy Activated Sludge Treatment Plant?

Question 12: To prevent contamination of potable water systems

Answer:

How is an air-gap device used?

Question 13: Butterfly Valve

Answer:

What is the best valve for throttling flow?

Question 14: 766 lbs/day

Answer:

Your system serves 2740 people and an industry contributes 300 lbs/day of BOD. How many pounds per day of BOD are received at your plant?

Question 15: Check Valve

Answer:

What is a valve that allows water to flow in one direction only?

Question 16: Disinfection

Answer:

Chlorine is primarily used for what?

Question 17: Increase wasting rate

Answer:

What is the most appropriate method to decrease F:M ratio?

Question 18: Denitrification

Answer:

What is the term used when bacteria convert nitrates and nitrites to nitrogen gas under anoxic conditions?

Question 19: blockage in discharge line

Answer:

What causes reduction in pump discharge rate?

Question 20: Containment and Cleanup

Answer:

What is the main concern when a chemical spill occurs?

Question 21: As an inhibitor solution for the DO analysis using the APHA method

Answer:

What is the purpose for adding Copper Sulfamic Acid?Question 22: To prevent wastewater in the discharge line from flowing back through the pump

Answer:

Why are check valves used in conjunction with centrifugal pumps?

Question 23: Settling in the clarifiers

Answer:

If your activated sludge plant begins to nitrify, what conditions would you expect to decrease?

Question 24: Excessive moisture

Answer:

What is one of the most likely causes of electric motor failure?

Question 25: Flow running too slow through discs

Answer:

In an RBC plant, the microscopic investigation revealed some amoebas and flagellates in the first set of discs; the second set showed free-swimming ciliates and some rotifers; and the third set had blood worms and nematodes. What is this an indication of?

Question 26: sulfur dioxide

Answer:

What chemical is used for de-chlorination?

Question 27: 9090 lbs/day

Answer:

Calculate the pounds per day of chemical dosage with a flow of 5MGD, dosing at a rate of 218 PPM.

Question 28: Decreased settling rate

Answer:

What should an operator expect to occur when flow increases to the secondary clarifiers?