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
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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 wastewat...
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 runof...
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, chole...
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...
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 o...
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 ...
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...
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 - ...
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 mus...
____ 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 ...
which disinfectant would work best against Cryptosporidium (Ans- Ozone The pH of a Water sample Is greater than the PHs so the Langlier index (Ans- indicates the water is scale forming When water high in calcium bicarbonate is softened by ion exchange (Ans- So...
What units are used to measure water pressure? a) Kilowatts b) Kilopascals c) Horsepower d) Head units (Ans- b) Kilopascals Which of the following is NOT an example of PPE (Personal Protective Equipment)? a) Exhaust fan b) SCBA c) Face shield ...
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...
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...
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? ...