SCIENCE 101 > EXAM > Cwea collections Grade 1| 28 QUESTIONS (All)
Cwea collections Grade 1| 28 QUESTIONS
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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 blocked. The different zones of traffic control include Correct Answer: buffer [Show More]
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