Wastewater Treatment Package deal:Wastewater Treatment: Wastewater Practice exam: Wastewater Treatment Operator:Water Treatment Grade 4 exam preparation:Water Treatment Exam Preparation Grade 2: Updated A+ Solutions

What is the methane content in a properly operating anaerobic digester? (Ans- 65 to 70% by volume What will the addition of chlorine gas do to the pH of wastewater? (Ans- decrease the pH What is the purpose of a Parshall Flume? (Ans- Measure the flow rate What is the typical removal eff...

What is the general definition of an ion? An _________ with a positive or negative charge (Ans- Atom A continuous positive pressure in a distribution system is essential for preventing what event? (Ans- Backflow Event _____________ water pressure must be maintained to ensure adequate custo...

When organic wastes are discharged to receiving waters, O2 is depleted by _____. (Ans- bacteria Hydrogen sulfide gives off an odor similar to____. (Ans- rotten eggs 3 diseases potentially carried by wastewater are _____. (Ans- typhoid fever, dysentery, cholera Immediate first aid for burns is to ...

A continuously flowing watercourse (Ans- Perennial Stream Algae causes PH to ....... at night (Ans- Decrease What contributes to creation of algae blooms (Ans- Increased nutrients Iron is found mostly in what sources of water (Ans- Groundwater Also called the rule of reasonable s...

____ and/or _________ in a water supply can discolor laundry, cause a bad taste in the water, and cause taste problems in beverages such as coffee and tea. (Ans- Iron and/or Manganese Water systems that collect less than _____ coliform samples each month can have 1 positive sample and remain in...

What are the two important factors impacting the effectiveness of chlorination? (Ans - Concentration of chlorine and contact time The treatment process that controls corrosion or scaling is known as what? (Ans - Stabilization Permanganate reactions are highly dependent on what factor? (Ans ...

What is a pathogen? (Ans- Disease-causing microorganisms. What is the impact of algae to water quality? (Ans- Taste and odor problems. What is the concentration of chlorine gas? (Ans- 100%. Which of the following is not used to mix coagulants? (Ans- Horizontal paddle wheel. What ...

What is the typical BOD removal efficiency in a primary clarifier? A) 10 to 15% B) 40 to 60% C) 20 to 50% D) 95 to 99% (Ans- C) 20 to 50% (v.1 pg 129) What does the "F" in F/M ratio represent? A) The microorganism population in the aeration tank B) The amount of filamentous bacteria...

What is the most common reason for a wastewater to contain intermittent large amounts of sand, gravel, and grit? (Ans- storm events Wastewater Sources & Characteristics: Combined wastewater is defined as (Ans- sanitary wastewater and stormwater runoff Wastewater Sources & Characteristic...

What is the methane content in a properly operation anaerobic digester? A) 30 to 35% by volume B) 1 to 2% by volume C) 65 to 70% by volume D) 15 to 20% by volume (Ans- C) 65 to 70% by volume (v.2 pg 158) What will the addition of chlorine gas do to the pH of wastewater? A) Moderately ...

An Imhoff cone is used to measure________solids. A. suspended B. colloidal C. volatile D. settleable (Ans- D. settleable (Operation of Wastewater Treatment Plants, Volume 1 by Kenneth D. Kerri) A _____ flume is widely used for measuring wastewater flow. (Ans- Parshall (Operation ...

As an operator, you are responsible to your employer for maintaining an economical and efficient operating facility. (Ans - TRUE An operator has an obligation to the great numbers of people who rely on down stream water supplies and are totally dependent on the operator's competence and trust w...

In the activated sludge process, some of the activated sludge must be wasted to... A. Prevent excessive solid buildup B. Prevent clogging of the sludge return line C. Prevent overloading of sludge return pumps D. Increase digester gas production (Ans - A. Prevent excessive solid buildup Th...