Sedimentation
Math
Laboratory
Equipment
Rules and Regs
100
The most important test to indicate proper sedimentation.
What is turbidity?
100
A tank has a length of 100 ft, a width of 25 ft, and a depth of 15 ft. Find is the surface area in ft².
What is 2500 ft²?
100
When running the test for available phosphates, if phosphates are present in the water sample it will turn this color.
What is blue?
100
Centrifugal, psitive displacements, and turbine are types of this___.
What are pumps?
100
The amount of time between the end of the month and when the MOR for that month must be submitted to the DWS.
What is 10 days?
200
This test is often used to determine if short-circuiting is ocurring.
What is dye tracing?
200
A clarifier has a diameter of 82 ft and a depth of 12 ft. Find the length of the weir around the clarifier in ft.
What is 257 ft?
200
This test can be used to determine the optimal dose for a polymer.
What is a jar test?
200
Tubercules can form on this type of pipe.
What is ductile iron?
200
When a water plant is not in operation and the water plant operator is not in attendence the plant entrances shall be this.
What is locked?
300
A metal, wooden, or plastic plate installed in the flow of water to slow the velocity and provide a uniform distribution of flow.
What is a baffle?
300
A pump must pump 3,000 gpm against a total head of 25 ft. Find the horsepower required to do the work.
What is 18.9 HP?
300
This color indicator reacts with chlorine to form a pink color.
What is DPD?
300
Air gap seperation is measured from the flood level rim of a receiving vessel. This is the minimum seperation of a correctly installed air gap.
What is one inch?
300
All dead end water mains shall be equipped with this.
What is a blow off or suitable flushing mechanism?
400
The minimum detention time required for a conventional turbidity removal sedimentation basin.
What is 4 hours?
400
The average flow for a water plant is 6.3 MGD. A jar test indicates that the best alum dosage is 19 mg/L. Find the pounds per day the operator will need to feed.
What is 998.3 lbs/day?
400
A measure of the ability of water to neutralize a strong acid
What is alkalinity?
400
A rotating drum lined with finely woven material such as stainless steel, used to remove algae and small debris before they enter the water treatment plant.
What is a microstrainer?
400
The primary MCL for Nitrite.
What is 1 mg/L?
500
This type of sedimentation basin combines coagulation, flocculation, and sedimentation into a single treatment unit.
What is a solids contact basin/ upflow clarifier?
500
A water plant uses 14 lbs of polymer to treat 2 MGD. Find the polymer dose in mg/L.
What is 0.84 mg/L?
500
The required sample volume for the analysis of toal coliform.
What is 100 ml?
500
An electrical system for preventing corrosion to metals, particulary metallic pipes and tanks.
What is cathodic protection.
500
The MCL for total coliform is based on this.
What is prescence or absence?