CWEA

Legally responsible officals are required to report catagory 1 sanitary sewer overflows: Correct Answer: Within two hours When testing a manhole for explosive gases when should the first test be made? Correct Answer: Before removing the manhole cover When setting up to ventilate a manhole,the air inlet should be how many feet above street level? Correct Answer: 2.0 feet Which chemical may be used for odor control in a sewer system? Correct Answer: Hydrogen peroxide A category 2 i...

Acid: Correct Answer: A substance which releases hydrogen ions when dissolved in water. Most acids will dissolve the common metals and will react with a base to form a neutral salt and water. An acid is the opposite of an alkali, has a pH rating lower than 7.0, will turn litmus paper red, and has a sour taste. Acidity: Correct Answer: The quantitative capacity of water or a water solution to neutralize an alkali or base. It is usually measured by titration with a standard solution o...

If the potential difference across the coil is low, the coil will: A-draw too much current B-become too hot C-Produce too much magnetic force D-not heat up - D-not heat up The NEC identifie s environments that contain flammable vapors and gases as which class of hazardous location? A-Class I B-Class II C-Class III D-Class IV - A-Class I Which of the following reduces high voltages and currents to save values for measurements? A-auto transformer B-megohmmeter C-instrument transformer D-variable t...

AA Correct Answer: atomic absorption AC Correct Answer: power alternating current ac Correct Answer: acre AF Correct Answer: acre-foot (feet) AFY Correct Answer: acre-foot per year AMSA Correct Answer: Association of Metropolitan Sewerage Agencies ANSI Correct Answer: American National Standards Institute APHA Correct Answer: American Public Health Association AS Correct Answer: activated sludge ASCE Correct Answer: American Society of Civil Engineers ASM...

A Flagger should Stand? A. On the shoulder adjacent to traffic being controlled B. In the closed lane before stopping vehicle traffic C. In the traffic lane. D. As stated in "A" or "B" above. Correct Answer: D. As stated in "A" or "B" above. Legally responsible officials are required to report category 1 sanitary sewer overflows? A. Within 30 days B. Before end of the day C. As soon as possible D. Within 2 hours Correct Answer: D. Within 2 hours When working in confined s...

Sewer maintenance vehicles are Correct Answer: difficult to maneuver At low concentrations, hydrogen sulfide smells like Correct Answer: Rotten Eggs which safety hazard in a collection system operations can be detected by an insturment? Correct Answer: Toxic Gases What must be checked first before entering a manhole? Correct Answer: Proper barricades or warning devices around manhole. When should field crews use signs and cones? Correct Answer: When over half the street is block...

Why are gasoline and volatile solvents objectionable when present in a sewer? - They produce an explosion hazard You should never attempt to install, maintain, repair or replace electrical equ ipment panels, controls, wiring or circuits unless - You know what you are doing, are qualified and are authorized What are the different areas of traffic zones? - Advance Warning Area, Transition Area, Activity Area (buffer space and work space), Termination Area. Could be 4 or 5, justify your answer on t...

Why are gasoline and volatile solvents objectionable when present in a sewer? - They produce an explosion hazard You should never attempt to install, troubleshoot, maintain, repair, or replace electrical equipment unless: - You know what you are doing, are qualified, and are authorized. How many different areas of traffic zones are there when working in roadways? - Five Why should hydrogen sulfide be controlled? - To protect sewers and structures from corrosion Personnel entering a Permit Requir...