1-80 of 80
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5 feet
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Excavations greater than ________ deep should be shored or sloped
Have at least two employees standing on the topside
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When entering a vertical confined space, the distribution operator should:
Notify customer to repair it immediately or service may be terminated
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It has been determined that a customers backflow device has failed, what
steps should the utility take?
Copper and plastic
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What types of pipe are commonly used for water distribution service lines?
Tracer wire or tape
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How can a buries plastic water pipe be located using electronic
equipment?
It would raise the pH
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Chlorine products affect the pH in different ways. If 18% sodium
hypochlorite (caustic soda) was blended into a solution and used as a
disinfectant, what effect could this solution have on the pH of the water?
, Just outside the chlorine room
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Where should a self-contained breathing apparatus be stored when a
water utility uses chlorine gas as a disinfectant?
To prevent water loss when hydrant is damaged
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Why do water systems install dry barrel fire hydrants?
Hypochlorites
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What type of chlorine product is used most often to disinfect groundwater
wells?
Fire
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