water treatment 1

What is the name of the particle size category that includes pathogens?

Can colloidal particles be effectively removed by conventional sedimentation and or filtration?

What treatment process destabilizes colloidal particles?

Flocculation increases?

Flocculation is the

What is the name of the particle size category that is effectively removed by conventional sedimentation and filtration?

What is the term for the visible suspended particles formed by gentle mixing of coagulated water?

What is the term for over-mixing in flocculation that produces smaller particles?

Flocculation Basin detention time (usual)

paddle mixers generally produce less

What is the term for the hydraulic phenomenon where some water passes through a process more swiftly than the rest of the flow?

What is generally constructed between stages of a flocculation process to reduce short circuiting?

What would be the result of adding solid longitudinal baffles to a flocculation basin?

long organic molecules that can link many colloidal particles together

The mechanism by which polymers work is called?

Bridging makes particles

Detention time = ?

Dropping the mixing intensity from stage to stage is called?

Mixing intensity is measured as

what force causes suspended particles in sedimentation basins to exhibit a vertical velocity?

what is the particle motion in a sedimentation basin that is produced by the flow of the water?

In which of the following processes would we expect to see a reduction in turbidity from influent to effluent?

Which of the following treatment processes is used to remove suspended particles from the water?

Which of the following processes can be considered as a competition between horizontal and vertical particle velocities?

How many gallons of water will be added to a 50-foot diameter storage tank in 8 hours, if the influent flow rate is 2.5 MGD?

What processes must precede Sedimentation if this process is to be effective at removing colloidal particles?

If the level of accumulated sludge in a sedimentation basin becomes too high, what is the most appropriate Operator action?

When flocculation mixing intensity drops from stage to stage, it is termed

The water stream flowing into a unit treatment process is termed the

Which of the following can lead to shear?Answers:
Tapered mixing
Short circuiting
Static mixing
High mixing energy
Surface loading

The purpose of flocculation is to

Flocculation is an example of a

The hydraulic condition that allows some water to pass through a process faster than the theoretical detention time is called

Which of the following may be employed to reduce short-circuiting in the flocculation process?
Increased basin length-to-width ratio
Use of multiple stages
Baffles between stages
Inlet baffles
All the above

Which of the following treatment processes is used to remove suspended particles from the water?

Which of the following processes can be considered as a competition between horizontal and vertical particle velocities?

What are the two barriers to pathogens required by the SWTR?

What is the SWTR req for reduction of viruses in a properly operated conventional plant?

What swtr particle removal award for Giardia in a properly operated conventional plant?

Slow sand filtraton flow rate

What is Schmutzdecke 

how much schmutzdecke is removed 

DE filters common used on

in addition to slow sand filtration which swtr approved tech removes most particles via the straining mechanism?

What are the four unit processes that combine to form conventional treatment?

Filter types

Filtration Rates by type

What is the SWTR classification for a filter that operates at a filtration rate of between 2 and 6 gpm

Which of the following is expressly prohibited under the surface water treatment rule?

What is the term for monomedium filters with filtration rates upto 2 gpm

What is the filter component that evenly distributes the clean water being used to backwash a filter?

The most common filter media

upper layer in a dual media filter?

What is the term for the removal of trapped suspended particles

Waste stream generated by a filter backwash?

mechanical device used to control the rate of flow or the overall head loss through a filter

what processes from conventional treatment are considered as pretreatment for filtration?

What polymer types are commonly used as filter aids?

term for the mechanism used by polymers to ling particles together

What are the two most likely events that would necessitate a backwash

term for the additional energy applied to a filter for a more thorough washing operation?

What is the form of supplemental scour used with most deep bed filters

Under ideal growth conditions, after several hours a single bacterium can reproduce to form a visible

What is the most important general water quality difference between surface water and ground water?

Into which category of microorganisms would we place Giardia?

In terms of their physical size, microorganisms are classified as

What types of molecules comprise most of the cell wall of a typical bacterium?

What is the term used to designate something as being a living entity?

Which of the following is a form of microorganism?

What are the chemical products formed during aerobic respiration?

Which of the following laboratory analyses will detect the largest number of different kinds of microorganisms?

Brilliant green bile is an essential ingredient in which of the following?

Which of the following is a protozoan?

How long will it take to obtain test results using the ColiLert method?

MMO-MUG is an essential ingredient in which of the following laboratory analyses?

What steps must be taken when a single routine sample tests positive for total coliform?

Which of the following is a step in the Multiple Tube fermentation analysis?

Gas withdrawal rates
100-150lb container
1 ton 
90 ton

Specialized repair kit for chlorine containers

Calcium Hypochlorite facts

Sodium Hypochlorite

What are the three chem used to chlorinate drinking water?

Chlorine of any form will form ------ when dissolved in water.

Liquid and Solid chlorine raise
while gas chlorine lowers

HOCl
HCl

what is the main chemical form of free chlorine?

When hypochlorous acid dissociates what ion is produced?

What is and indicator of raw water quality?

What is used in CT calculations

PEL limit

Na(OCl)

Cl2

Ca(OCl)2

How much Gaseous chlorine can be delivered in a single day by a one ton container?

What device is used to generate the vacuum under which a gas chlorine feed system operates?

Where is chlorine typically applied to adjust the residual in the distribution system?

What is the residual chlorine measurement method for most online analyzers?

What is the field method for measuring residual chlorine levels in grab samples?

how long does the DPD method take

What is the first step to resolving a liquid chlorine leak?

What is used to form the seal between a nes gas chlorine container and a plants permanent chlorine piping?

What causes erosion corrosion  in copper tubing

Water with a higher dissolved solids content has a greater potential for?

What is the most common type of corrosion cell

A thin film or coating of Calcium carbonate can drastically,,,

advantage of  Zinc treatments for corrosion control