Sulfide - Study guides, Class notes & Summaries

Why are gasoline and volatile solvents objectionable when present in a sewer? correct answers They produce an explosion hazard You should never attempt to install, maintain, repair or replace electrical equipment panels, controls, wiring or circuits unless correct answers You know what you are doing, are qualified and are authorized What are the different areas of traffic zones? correct answers Advance Warning Area, Transition Area, Activity Area (buffer space and work space), Termination ...

If wastewater contains dissolved oxygen, the biological breakdown will reduce sulfate to sulfide. T or F CORRECT ANSWER False At a pH below 5, all sulfide is present in the gaseous h2s form and most of it can be released from wastewater. T or F CORRECT ANSWER True In order to control odors effectively, the operator should know where odors originate and the cause. T or F CORRECT ANSWER True Chlorination is one of the oldest and least effective methods of controlling odors. T or F CO...

Anabolism is: a. all of the biochemical reactions taking place in an organism b. all of the energy releasing biochemical reactions in an organism c. all of the biochemical reactions in an organism that use cellular energy d. the maintenance pH at the neutral level preferred by most microorganisms Correct Answer-c. all of the biochemical reactions in an organism that use cellular energy A bacterium that uses glucose as an energy source has been isolated from an anaerobic environment. Afte...

Illinois Lead Risk Assessor Guide – 2022/2023 Already Passed Water Lead Action Level 5 ppb Soil High Contact Area Action Level 400 ppm Soil General Action Level 1200 ppm Soil Abatement Level 5000 ppm Soil IDPH Regulatory Level 1000 ppm Paint Chip - HUD hazard level 5000 ppm or 0.5% Lead by weight Consumer Product Safety Commission (CPSC) - Regarding Lead Banned new paint containing more than 90 ppm (or 0.009%) lead for residential use. T/F: There is a ban for LBP in an industrial settin...

Turbidity in wastewater is caused by A. color B. dissolved calcium C. hardness D. finely divided suspended material - Answer-D. finely divided suspended material The gas most commonly associated with septic wastewater is A. carbon dioxide B. carbon monoxide C. hydrogen sulfide D. methane - Answer-C. hydrogen sulfide How many cubic meters per second in 10 MGD? A. 0.44 B. 1.44 C. 4.73 D. 24.62 - Answer-A. 0.44 Mechanical ventilation of a lift station is required to A. lower tempera...

program for writing reports: - word processor mechanical seal advantage: - lasts longer pump is just back from the shop and pulls high amps, what is the likely cause: - packing too tight change in the discharge head of the pump: - increases flow why does an engine driven blower need to be started under no pressure? - may damage fans belt press water is shiny and the sludge sticks: - lower polymer dosage and adjust belt speed what is a Chain of custody? - time of collection unti...

Wastewater Treatment Operator Certification Test 2 final study guide 2024/2025 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% 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 in the activated sludge process C) The MLVSS in the aeration tank D) The food for the microorganisms flowing into the aera...

ABC Wastewater Collection Level 3/ 77 Q&A/ . Terms like: Turbidity in wastewater is caused by A. color B. dissolved calcium C. hardness D. finely divided suspended material - Answer: D. finely divided suspended material The gas most commonly associated with septic wastewater is A. carbon dioxide B. carbon monoxide C. hydrogen sulfide D. methane - Answer: C. hydrogen sulfide

What does hematoxylin and eosin stain? Correct Answer-Hematoxylin (purple) stains basophilic structures. Examples: DNA, RNA, Ribosomes Eosin (pink) stains eosinophilic/acidiphilic structures. Examples: cytoplasm and collagen. Which stain detects carbohydrates? What color does it turn carbs? Correct Answer-Periodic Acid-Schiff Reactions stain carbohydrates magenta Alcohols -> aldehydes Schiff reagent reacts w/aldehyde = magenta color. What would you use to detect enzyme activity? What...

Geol Board Exam part 2 UPDATED Actual Exam Questions and CORRECT Answers Hydrothermal Deposit Types - CORRECT ANSWER- Hypothermal Mesothermal Epithermal Hypothermal Deposits - CORRECT ANSWER- Formed at depth, high pressure and temperature Sulfide ore minerals are: Galena, sphalerite, pyrite, chalcopyrite, molybdenite, bornite, et