Water Operator Study Guide Module 1

What process occurs when oxygen is added to water causing a change in substances in the water and resulting in stable substances?
1. Charge chemistry
2. Wet chemistry
3. Oxidation
4. Sequestration
What may be the cause of floc break up after the flocculation process?
1. Detention time is excessive
2. Short circuiting is occurring
3. Mixing speed is to high
4. Coagulation injection is obstructed
What is the term used to describe bacteria, viruses or other organisms capable of causing disease?
1. Pathogenic
2. Non - pathogenic
3. Facultative
4. Coliform
Tastes and odors such as grassy, septic, musty and earthy are all related to what water quality related issue?
1. Algae
2. Manganese
3. Mineral content in the presence of a disinfectant
4. Corrosion in metallic pipes
What term describes reducing the water velocity and allowing gravitational forces to remove heavier particles from water?
1. Sedimentation
2. Flocculation
3. Van der waals
4. Eddy currents
Sedimentation basins all have four zones, the inlet zone, the settling zone, the outlet zone and what is the fourth zone?
1. Mixing zone
2. Sludge zone
3. Recirculation zone
4. Clarification zone
Which element of the sedimentation basin collects the water flowing out of the sedimentation basin and directs it to the effluent piping?
1. Perforated baffle wall
2. Stilling well
3. Debris dam
4. Effluent launder
The clumping together of smaller particles into larger particles by the use of chemicals is called _____?
1. Sedimentation
2. Flocculation
3. Coagulation
4. Polarization
What device is used to mix ozone with water?
1. Contactor
2. Condenser
3. Dryer
4. Ozonator
What is the name of the metal inserted into a water main and later weighed providing a measure of the water’s corrosiveness?
1. Coupon
2. Tag
3. Anode
4. Cathode
In general what pH level will increase the corrosion rate in a distribution system?
1. A high pH
2. A low pH
3. A neutral pH
4. pH has no effect on the rate of corrosion
Which disinfectant will effectively kill Cryptosporidium, Giardia, protozoans, and some viruses?
1. Chlorine
2. Monochloramines
3. Dichloramines
4. Chlorine dioxide
What is the term used to describe the disinfection process where excess chlorine is available for disinfection and for every increase in the dosage there is a corresponding increase in the residual?
1. Breakpoint chlorination
2. Shock loading
3. Flash mixing
4. Chloramination
How does a higher temperature effect the disinfection action of chlorine?
1. Higher temperatures reduce the effectiveness of chlorine
2. Higher temperatures increase the effectiveness of chlorine
3. Higher temperatures have no effect on chlorine effectiveness
4. Only lower temperatures effect chlorine
What is the disinfection byproduct formed by the use of Ozone?
1. Bromate
2. Chlorite
3. Trihalomethanes (TTHM’s)
4. Haloacetic acids (HAA5’s)
What is the hold time, allowable storage prior to lab analysis, for properly preserved TTHM samples?
1. 7 days
2. 14 days
3. 30 days
4. Indefinite if properly preserved
What type of valve is installed on the suction pipe to keep the pump and pipe full of water?
1. Globe valve
2. Pressure reducing valve
3. Auxiliary valve
4. Foot valve
Which one of the following is not a filter media configuration?
1. Single media
2. Dual media
3. Multi media
4. Granular media
How often should sedimentation tanks be cleaned and inspected?
1. Once every five years
2. Once every three years
3. Once every year
4. Minimum of twice a year
How should oil be added to pumps?
1. When the pump is at a complete stop
2. While the pump is operating at full speed
3. While the pump is operated at 50%
4. While placing the pump in reverse to ensure adequate coverage
What should be provided on the discharge side of each pump, delivering water to the distribution system, to prevent backflow when the pump stops?
1. Orifice Plate
2. Check Valve
3. Gate Valve
4. Globe valve
What is the term that describes when water is applied through the lantern ring to the packing as a lubricant?
1. Seal water
2. Lube water
3. Lantern ring seal
4. Packing water
What substance is used to regenerate greensand used for iron and manganese removal?
1. Potassium Permanganate
2. Citric Acid
3. Caustic Soda
4. Activated carbon
What type of acid should be used when preserving iron samples prior to analysis?
1. Sulfuric
2. Hydrochloric
3. Nitric
4. Sodium acetate
How many gallons of water are contained in 3,382 cubic feet?
1. 234,870 gallons
2. 23,487 gallons
3. 252,970 gallons
4. 25,297 gallons
If pumps are not variable speed but constant speed how is water flow to the distribution system controlled?
1. Add or remove pumps from service
2. Turn pumps off and let pressure drop and restart
3. Manually close check valve with weights
4. Manually close discharge valves to adjust flow
How should all vents on storage tanks be protected?
1. Screened
2. Steel cover plates
3. Painted
4. Crash bars
What was the main risk that was to be addressed with the Filter Backwash Recycling Rule?
1. Reduce risks from pathogens like Cryptosporidium
2. Reduce risks from heavy metal accumulation in recycle water
3. Reduce risks from manganese toxicity
4. Reduce risks from filter breakthrough during backwashing
What portion of the total plant flow is treated with excess lime to remove magnesium in the spilt treatment process?
1. Typically 50%
2. Typically 20%
3. Typically 80%
4. Typically in excess of 90%
Why is acid commonly added to the feed water of a cellulose acetate membrane treatment unit?
1. Ensure passage of iron
2. Disinfection of the membrane
3. To reduce hydrolysis
4. Reduce osmosis rate

Water Operator Study Guide Module 1

Practice Quizbrought to you free of charge by RoyCEU.com

Practice Quiz
brought to you free of charge by RoyCEU.com