Wastewater Operator Questions & Answers(RATED A) EXAM BUNDLE

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 -ANSWER 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 ...

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% -ANSWER 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...

1 mg/l is the same as 1 part per billion (ppb) True or False -ANSWER False (v.1 pg 468) A SCADA system is capable of monitoring and controlling equipment from a remote location True or False -ANSWER True (v.2 pg 627) A Discharge Monitoring Report is typically submitted to the regulatory...

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 -ANSWER A. Prevent excessive solid buildup Th...

Biochemical Oxygen Demand -ANSWERorganic strength measured by amount of oxygen consumed over time composite sample -ANSWERsample combined from multiple grab samples grab sample -ANSWER1 sample representative of current conditions Dissolved Oxygeb -ANSWERmeasure of the amount of oxygen disso...

The first step in maintenance staff should take in properly locking and tagging out a piece of equipment is to - ANSWERalert the operator on duty When working in an area with two or more floor coverings, be sure that they are always - ANSWERSecured together When manually lifting any object be ...

What is true about chlorine gas? - ANSWERIt is 2.5 times heavier than air What is the typical BOD removal efficiency in a primary clarifier? - ANSWER20 to 50% What does the "F" in F/M ratio represent? - ANSWERThe food for the microorganisms flowing into the aeration tank, in lbs/day What ...

The Activated Sludge Process: A. requires preaeration B. requires Activated Carbon C. is an aerobic biological process. D. Usually precedes primary sedimentation. E. Requires 50% by volume old sludge to work effectively. -ANSWER C. Is an Aerobic biological process A complete mix activated ...

Surface water runoff, storm water, sanitary and industrial. -ANSWER A collection system that is called "combined" may carry this kind of wastewater: 2 -ANSWER The flow in a collection system should be a minimum of ____ feet per second (FPS)? Solids will settle. -ANSWER What will happen if th...