Confined Space
When working in a confined space the oxygen level should never drop below?
What is 19.5%
A customer calls to complain about high water pressure and had to replace the washing machine because of this issue.
What is pressure reducing valve
This is the deadliest excavation hazard
A cave-in or trench collapse
What is lead
This is the acronym for deposits that come from meat fats in cooking and food scraps, cooking oil, shortening, lard, butter and margarine, gravy, and food products such as mayonnaise, salad dressings, sour cream and other foods high in fat.
Fats, Oil and Grease (FOG)
It is essential to ventilate a vault before entering in order to?
What is remove dangerous gases and ensure proper oxygen levels
What is ON, OFF
At what depths is shoring required in a trench if its excavated in type C soil
4 feet or deeper
The operating nut on top of a hydrant has how many sides?
What is five
Sewer mains larger than 12-inches in diameter shall be constructed of this material only.
What is Ductile Iron Pipe (DIP)
I am a colorless gas with a strong odor of rotten eggs
What is hydrogen sulfide (H2S)
While on-call Operations tells you, a customer has a sewer backup in the house. You arrive to find no cleanout. What is something you can check on the City side?
What is check a few manholes in the area to make sure the sewer main is flowing properly
This horizontal distance is to be maintained when executing separation between new water and sewer mains.
Before installing a repair band around the break of a pipe, you should do this.
Thoroughly clean the exterior of the pipe.
These larger mains carry tributary flows from neighborhoods and businesses that eventually end up at stations to be metered.
What are trunk mains
Atmospheres with a concentration of flammable vapors at or above 10% of the __________ are considered hazardous when located in a confined space.
Lower Explosive Limit (LEL)
While planning an excavation for a service disruption in any neighborhood, what two notification types are necessary to allow the public to plan for the upcoming work.
Water/Sewer shutdown and no parking signs
In an excavation, the ladder must extend this far our of the excavation
3' feet
A valve that has it's operating nut located beside vs on top of the valve body is what type of valve
What is a butterfly valve
All manholes must have this between the manhole casting, adjusting rings, and cone section
What is a chimney seal
The act of being swallowed up in or immersed by a material, which leads to asphyxiation is called this
What is engulfment
A customer calls for dirty and cloudy water after flushing a nearby fire hydrant. What can be done to help clear their service line of any air.
What is a jumper or remove the meter head temporarily
Temporary spoils must be placed no closer than _____ feet from the surface edge of the excavation.
2' feet
Before a new watermain can be put into service what two things must take place to ensure reliability and health safety.
What is a hydrostatic and bacti testing.
A new manhole less than 10' deep must be vacuum tested with how much HG and for how long?
What is 1-inch HG for 60 seconds.