Urban Policy and Planning > EXAM > Cwea collections Grade 1 Questions and Answers (100% Correct Answers) (All)

Cwea collections Grade 1 Questions and Answers (100% Correct Answers)

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Sewer maintenance vehicles are difficult to maneuver At low concentrations, hydrogen sulfide smells like Rotten Eggs which safety hazard in a collection system operations can be detected b... y an insturment? Toxic Gases What must be checked first before entering a manhole? Proper barricades or warning devices around manhole. When should field crews use signs and cones? When over half the street is blocked. The different zones of traffic control include buffer Elements of defensive driving include having your vehicle under control The primary function of an entry supervisor is to maintain overall saftey of permited confied space operations What should be the alarm set point for oxygen in an atmospheric monitoring/testing device? 19.5% Warning,caution,danger,on a label means Hazardous MSDS means Material Data Safety Sheet What is the purpose of the OSHA Hazard Communication SHeet To make sure employees know about any hazardous chemicals they may contact How can traffic be warned of your presence in the street? Signs,Cones,Flagman What check should be preformed before driving a vehicle? Mechanical/Safety Where will collection system operators most likely find black windows Spiders and scorpions. Manholes Typical safety hazards in collections system operations include Oxygen defiency You have an air compressor and you have been instructed to compact the backfill in a trench. Which of the following is the best tool to use? Tamper Which type of shovel do collection system technologist use Grit Shovel What type of saw is used to cut asphalt? Diamond bladed or toothed power saw Googles, earplugs, and glove are needed when using a Power Grinder What type of equipment should be used to excavate a broken sewer pipe? Backhoe What is a mechanical means to dislodge material from a sewer? Scraping The formula for calculating the volume of a wet well is V=WLH Tasks preformed by a collection system operator includes: Maintaining collection system equipment One cubic food per second flow is equal to 26,928 Gallons To properly operate a power rodder Make sure all the torque is out of it before handling. The diameter of a wet well is 10 feet. If filled to a depth of 10 feet, it will contain approximately Show Work = 5,872 Gallons What is an orifice plate? A plate with a small hole in it to restrict the flow. [Show More]

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