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85 Cards in this Set
- Front
- Back
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A palatable water ? A. Does not need treatment B. Is safe and taste good C. Tastes good |
C. Tastes Good |
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As Alkalinity increases ? A. Corrosion Increases B. Corrosion does not change C. Corrosion decreases |
Corrosion decreases |
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Lock out tag out ? |
Prevents equipment from being energized |
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SBCA and fire extinguishers should be ? A. Inspected daily B. Locked up to prevent tampering C. Stored outside the chemical room |
C. Stored outside the chemical storage area |
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THMs ? A. Improve water taste B. Cause cancer C. Cause blue baby |
B. Cause cancer |
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What pump part imparts energy to water ? A. Impeller B. Check valve C. Wear ring |
C. Impeller |
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What causes red water complaints ? A. Dyes B. Iron C. Magmnesium |
B. Iron |
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Primary drinking water standards ? A. Are not federally enforceable B.Are federally enforceable C. Are associated with SMCL |
B. Are federally enforceable |
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The cathode ? A. Corrodes B. Does not corrode C. Decreases in pressure |
B. Does not corrode |
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Riparian right are associated with ? |
Land bordering surface water |
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Secondary drinking water standards ? A. Federally enforceable B. Are not federally enforceable C. MCL |
Are not federally enforceable |
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Turbercle ? A. Has no effect on corrosion B. Increase corrosion C.Decreases corrosion |
C. Decreases corrosion |
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Surface water is characterized by ? A. No color B. Some color C. Harndess |
A. Some color |
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MCLG for THMs is ? A. 1 MG/L B. 2 MG/L C. 0 MG /l |
0 MG/L |
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Negative Langelier index indicates ? |
Corrosive water |
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Ground water is characterized by ? |
Hardness |
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What pump type is normally used for chemical delivery ? |
Positive displacment |
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What corrodes during cathodic protection ? |
Anode |
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What disease is spread through water ? |
Giardia |
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What pump style should never be started against a closed valve ? |
Positive displacment |
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Non-carbonate hardness removal, by chemical precipitation, requires the addition of a compound containing ? |
Carbonate |
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An aquifer is ? |
A formation capable of producing water at a usable rate |
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1 MG/L equals |
1 PPM |
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Hardness is expressed as |
Milligrams per liter |
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What is a lake non-productive in plant life called? |
Oligrotropic |
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Red drinking water complaints are caused by ? |
Iron bacteria, Corrosive water, Ferric hydroxide, Iron in the water |
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Specific water treatment plant processes will depend on ? |
Raw water impurities |
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During the daytime, a lake's ? |
PH and DO increase |
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Before a prolonged shutdown, pumps should be drained to prevent damage from ? |
Freezing |
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What reservoir water quality problem is caused by algae decomposition ? |
Color, Odor, THM formation following chlorination, Increased chlorine demand |
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Right before sundown ? |
DO and PH are highest |
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Nitrate causes ? |
Health threats to infants |
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Sedimentation basin sludge accumulation is removed to prevent ? |
Detention time reduction |
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What is a stratified lake middle layer called ? |
Thermocline |
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Filter aid polymer effectiveness can be evaluated by observing ? |
Filter backwash's water quality |
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When filling a new lake trees should be ? |
Cut and removed |
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Primary drinking water regulations contain MCL for ? A. Coliform Bacteria B. Color C. Odor D. Taste |
A. Coliform bacteria |
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If flocculation speed is too high ? A. Small floc will develop B. Floc will not form C. Floc will break apart D. Large floc will develope |
C. Floc will break apart
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Free residual chlorine refers to ? |
Chlorine |
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Low temperature water requires ? A. Smaller mixers B. Faster mixers C. Constant speed mixers D. Lower flocculation speed E. Greater flocculation speed |
E. Greater flocculation speed
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A PH of 1 is ? |
Acidic |
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When water temperature decreases, particles ? |
Settle slower |
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When a solution PH increases, solution becomes? |
More basic |
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Required sedimentation basin time is the shortest in ? A. Fall B. Winter C. Spring D. Summer E. Does not matter, particles always settle the same rate |
D. Summer
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Turbidity is caused by ? |
Suspended solids |
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When waters specific gravity decreases, particles? |
Settle faster |
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Lead causes |
Mental development problems in children |
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Sedimentation normally takes |
3 hours |
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Pathogens |
Cause disease in a host |
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Normally a minimum of __________ sedimentation basins are required ? |
2 |
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Most people notice odor more in ? A. Cold water B. Warm water C. Hot water D. Spring water |
C. Hot water
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What is a ton cylinders maximum withdrawal rate ? |
400 PPD |
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Hardness is caused by ? |
Calcium and Magnesium |
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What is the purpose of a fusible plug ? A. Prevent high current B. Fuse chlorine to water C. Prevent high voltage D. Allow a controlled release of chlorine |
D. Allow a controlled release of chlorine
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Most common corrosion indicator is ? |
PH |
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When chlorine reacts to Ammonia ? |
Combined chlorine residual is formed |
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Fluoride is added to water to ? |
Reduce cavities in children |
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How many fusible plugs are in a ton cylinder ? |
6 |
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MSDS stands for ? |
Material Safety Data Sheet |
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Two forms of free chlorine are |
Hypochlororous acid and Hypochlorite ion |
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Acids have a PH between |
0 to 7 |
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SDWA stands for ? |
Safe Drinking Water Act |
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Organic chemicals contain ? A. Calcium B. Magnesium C. Hydrogen D. Fluoride E. Carbon |
E. Carbon |
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Most widely used disinfectant ? |
Chlorine |
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An anionic polymer has ? A. No charge B. A negative charge C. A positive charge |
B. A negative charge
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SMCL are ? A. Enforceable by law B. Not enforceable by law C. Required for potable water |
B. Not enforceable by law
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Chlorine gas is ? A. Red B. Blue orange C. Greenish Yellow |
C. Greenish Yellow
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The lead washer for a chlorine cylinder can be reused ? |
0 times |
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Chlorine demand equals ? |
Dose minus Residual |
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What should be used to find a chlorine leak ? |
Ammonia spray |
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Before working on a piece of equipment be sure to ? |
Lock out tag out |
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Black water complaints are caused by ? |
Manganese |
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Surface water is dependent on ? |
Direct run off |
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Acid rain occurs ? |
When rain absorbs chemicals from the air |
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Copper sulfate penahydrate is used for ? |
Algae control |
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What indicator is used to determine coagulation type ? A. Hardness B. DO C. Ph D. Temperature |
C. Ph
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A positive displacement pump ? A. Is typically used with chemicals B. Is not used with chemicals C. Is not used with fluids that contain solids |
A. Is typically used with chemicals
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A PH of 1 is ? A. Good for drinking B. Not good for drinking C. Potable D. Palatable |
B. Not good for drinking
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The most common filter type is a ? |
Gravity filter |
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DPD is used to ? |
Test for chlorine |
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GAC stands for ? |
Granular Activated Carbon |
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Low turbidity water is ? A. Easy to coagulate B. Difficult to disinfect C. Non palatable D. Not potable E. Easy to disinfect |
E. Easy to disinfect
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Chemicals that decrease PH are ? |
Acidic |
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When the particle specific gravity is less than _______ particles will not settle |
1 |
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MCLs are ? A. Associated with Primary Regulations B. Associated with Secondary Regulations C. Associated with palatable water D. Not federally enforceable |
A. Associated with Primary Regulations
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