-
Which statement is untrue regarding a chlorine leak?
Apply water to the leak to stop the flow of gas
-
You have 1.0 mgll manganese in your finished water. What can you expect?
Staining of plumbing fyctures
-
Per SDWA, which statement is not true for chemical analysis?
Records must be kept for 5 years
-
You have organic color in the raw water. What is the best treatment?
H2S0, A12(S04)3N, aOH
-
With less NH3 in the raw water, what will you notice?
Chloramine formed before breakpoint, less C12 needed to reach breakpoint
-
Blue Baby Syndrome is caused by what?
High nitrates
-
You find 4 coliforms on a distribution sample plate. You should:
Get 4 repeat samples
-
The bible plug on a chlorine cylinder will melt at which temperature?
157-162 degrees F
-
Aeration will do which of the following:
Increase D.O. and pH, decrease H2S and C02
-
How do you soften non-carbonate hardness?
Caustic
-
Plant tap turbidity samples are required to be taken at a minimum of every 4 hours. What percent of a month's worth of samples must be below 0.5 NTU?
95%
-
CT values are expressed in what units?
mg/l-minutes
-
What is the best treatment for phenols?
ClO2
-
Activated carbon is rated according to what?
Phenolic value
-
Too much carbonate deposition on the filters will cause what?
- Shorter filter runs
- wer turbidity
-
17. You fmd 1.3 mg/l Barium at a customer's sink outlet. You should:
- A. Notify customer and resample within 48 hours at the sample location
- B. Do nothing
- C. Notify the media within 72 hours and resample same day at same location
- D. Report to OEPA within 7 days and initiate 3 additional analyses at the same point
-
18. What is the optimum filter rate for a rapid sand filter according to standard
practices?
-
19. When does negative non-carbonate hardness exist?
Hardness 110 Alkalinity 130
-
20. What is the best chemical to treat with if you have low hardness and high alkalinity?
- A. Lime
- B. Lime and Zeolite
- C. Na2C03
- D. Caustic
-
21. Sodium ion exchange increases what in the finished water?
- A. Ca(S04), MgS04, Mg(OH)2
- B. Na2S04, NaC1, NaN03
- C. Na2C03, CaC12, MgC03
- D. NaOH, Ca(OH),, Na2C03
-
22. The action level for copper at the customer's tap is based on what percentage?
- A. 95% of samples being above 1300 ugll
- B. 5% of samples being above 1300 ug/l
- C. None of the above
-
23. Which sets of parameters are needed to calculate CT values?
- A. Reactor C12 residual, pH, temp. in CO, raw flow gpm, reactor width, baffling factor
- B. Reactor C12 residual, pH, temp. in FO, finished flow gpm, reactor depth, baffling factor
- C. Reactor C12 residual, raw flow gpm, reactor volume, baffling factor
- D. Reactor C12 residual, raw flow gpm, reactor depth, baffling factor
-
24. You install a C102 set up in your plant. You must:
- A. Maintain a 500 mgll C12 in solution containing chlorites
- B. Maintain a 500 mgll chlorites in solution containing CI2
- C. Keep a two week supply of CIOz on hand as a minimum
- D. Keep a one week supply of C12 on hand as a minimum
-
25. As the temperature of water decreases, the ability of the floc particles to settle
- will do what?
- A. Decrease
- B. Increase
- C. Stay the same
- 26. What is the best pH range for color removal?
- 4-6
- 27. KMn04 is primarily used for:
- A. Taste and odor control
- B. Settling and manganese removal
- C. Chemical regeneration
- D. Disinfection
-
28. Name the taste and odor algae.
- A. Volvox, coliform, aphanizominon
- B. Cyclotella, asterrionella, melosira
- C . Anabaena, ceratium, synedra
-
3 1. Effective size of sand passes state standards, but uniformity coefficient is high. You can expect:
- A. Sand compacting
- B. Sand non-compacting
- C. Decrease loss of head
- D. Increase loss of head
-
32. As *the loss of head increases on a filter, the rate of flow controller will do what?
- A. Open up to area of flow
- B. Close to area of flow
- C. Try to remain at same opening
-
33. SDWA approved method for C12 residual:
- A. OTA
- B. Amperometric colorirneter
- C. DPD
- D. NTU
-
34. TON is measured by using what?
- A. Conductivity meter
- B. Odor fkee water
- C. pH probe
-
35. At the same flow rate, what will be the effect on the velocity when the pipe diameter is doubled?
- A. Increase velocity twofold
- B. Decrease velocity twofold
- C. Increase velocity fourfold
- D. Decrease velocity fourfold
-
36. Which is the least corrosive water?
- A. High calcium, low alkalinity
- B. High alkalinity, high calcium
- C. High alkalinity, low calcium
- D. High calcium, high residual C12
-
39. You are going to fill your up ground reservoir from a stream which is subject to feed lot runoff. What do you test for?
- A. NO3, D.O., C1
- B. S04, PO4, CL
- C. CO, NO3, SO4
- D. Algae, CL, coliform
-
41. Which statement is untrue regarding a C102 system in your plant?
- A. Maintain a 500 mg/l C12 in solution containing chlorites
- B. The solution has a greenish-yellow color
- C. Feed water should be softened to less than 100 mg/l
- D. 2NaC102 + C12 -+ 2C102 + 2NaCl
-
42. Partially closing the discharge valve on a centrifugal pump will cause:
- A. The motor to draw less amperage
- B. The motor to run hotter
- C. The motor to run slower
- D. The motor to draw more amperage
-
44. Which laboratory apparatus is used to measure dissolved solids in water?
- A. Spectrophotometer
- B . Arnperometric titrator
- C . Conductivity meter
- D. Zeta-potentiometer
-
45. Larger particle size and less dense filter media will produce:
- A. Shorter filter runs and slower rate of flow
- B. Longer filter runs and faster rate of flow
- C. Longer filter runs and slower rate of flow
- D. Shorter filter runs and faster rate of flow
-
46. If lime dosage in a lime sofiening plant is doubled, the result would be?
- A. Incrustation
- B. Increase filter runs
- C. Decrease in chlorine demand
- D. Increase in clear well production
-
47. For breakpoint chlorination the optimum pH for chlorine feed is:
- A. 6.5-7.5
- B. Less than 7.0
- C. Greater than 8.0
- D. 7.0-8.0
-
48. The motor of a centrifugal pump over heats because a high volume of water is being pumped against a low head. The pump discharge valve is throttled back so that only 30% of the original volume is being pumped. What will this do to the motor temperature?
- A. Temperature will increase
- B. Temperature will remain the same
- C . Temperature will decrease
- D. Temperature will decrease slightly but then increase sharply
-
50. Sodium alkalinity is also known as negative noncarbonate hardness (NaHC03) because it reacts with lime to:
- A. Reduce carbonate hardness
- B. Reduce sodium hardness
- C. Reduce all forms of alkalinity
- D. Reduce noncarbonate hardness
-
5 1. What should you notice after well water has been aerated?
- A. Increase D.O. and pH, decrease H2S and CO2
- B. Increase D.O. and H2S, decrease pH and CO2
- C. Decrease D.O. and pH, increase H2S and CO2
- D. Decrease D.O. and His, increase pH and CO2
-
52. The pH is a measure of ?
- A. Conductivity
- B. Water's ability to neutralize acid
- C. Hydrogen ion activity
- D. Dissolved solids
-
53. The primary source of volatile organic chemical (VOC) contamination of water supplies is?
- A. Agricultural
- B. Industrial solvents
- C. Acid rain
- D. Agricultural fertilizers
-
54. Hydrogen sulfide gas causes?
- A. Corrosion of structures and equipment
- B. High pH values
- C. Destruction of algae
- D. Destruction of bacteria
-
55. The type of corrosion caused by the use of dissimilar metals in a water system is?
- A. Caustic corrosion
- B. Galvanic corrosion
- C. Oxygen corrosion
- D. Tuber
-
56. Chlorine reacts with nitrogenous compounds to form?
- A. Ammonia nitrate
- B. Free chlorine
- C. Chlorinated hydrocarbons
- D. C hlorarnines
-
57. If solids in water have an average specific gravity of 1.20, they are?
- A. 12 % heavier than water
- B. 20 % heavier than water
- C. 2 % heavier than water
- D. 20 % lighter than water
-
58. Cavitation in pumps may be caused by pumping?
- A. Against discharge heads higher than design values
- B. Excessive amounts of abrasive solids
- C. Flow rater considerably higher than design flows
- D. With impeller speed below manufacturer's recommendations
-
59. Trohalomethane (THM) precursors are compounds?
- A. Chloramine
- B. Methane
- C. Natural organic
- D. Synthetic organic
-
60. Three most commonly used coagulants in water treatment are?
- A. Aluminum hydroxide, lime, and sodium hydroxide
- B. Aluminum sulfate, ferric chloride, and ferrous sulfate
- C. Lime, sodium hydroxide, and chlorine
- D. Soda, lime, and chlorine
-
61. In order for a chemical to hction satisfactorily as a coagulant, it must?
- A. Destroy bacteria
- B. React with the alkalinity in the water causing floc formulations
- C. React with the lime
- D. Remove taste and odorscular corrosion
-
62. Alkalinity in water serves as?
- A. A measure of the concentration of calcium
- B. A mild disinfectant
- C. A measure of the water capacity to neutralize an acid
- D. A corrosion inhibitor
-
63. Greensand is often used as a filter medium for water with high?
- A. Turbidity
- B. Manganese concentrations
- C. Bacterial counts
- D. Magnesium concentrations
-
64. Chemicals that cause alkalinity in water are?
- A. Calcium carbonate and calcium oxide
- B. Calcium sulfate and sodium sulfate
- C. Magnesium chloride and iron chloride
- D. Sodium chloride and calcium chloride.
-
65. The process in which dye or fluoride is added to the water to test for velocity?
- A. Velocity test
- B. Tracer study
- C. Dye test
- D. Velocity study
-
66. In a direct filter plant which process is skipped?
- A. Flocculation
- B . Coagulation
- C. Flash mix
- D. Sedimentation
-
67. Which one is not a polymer?
- A. Anionic
- B. Cationic
- C. Nonionic
- D. Covalent
-
68. The chemical transformation of a substance in solution into an insoluble form is?
- A. Coagulation
- B. Sequestration
- C. Precipitate
- D. Flocculation
- E. Sedimentation
-
69. Whichofthe followingconditions, when found in the water supply, would tend to increase the corrosiveness of the water on metals?
- A. High dissolved CO2 content
- B. High alkalinity
- C. Low dissolved CO2 content
- D. Low dissolved minerals
-
70. The principal reason for using soda-ash in the lime -soda softening process is to?
- A. Absorb
- B. Remove non-carbonate hardness
- C. Adjust corrosion index to scale forming side
- D. Maintain proper sulfate-carbonate
-
71. What is the amount of time water should set in the distribution line before a lead and copper sample is drawn?
- A. 12 hours
- B. 24 hours
- C. 48 hours
- D. 6 hours
-
72. Which chemical is considered the most effective for removing or destroying the effect phenols have in water?
- A. C102
- B. Cl2
- C. Activated carbon
- D. KmN04
-
73. Which raw materials are used to generate chlorine dioxide?
- A. Sodium chlorate and chlorine
- B. Sodium chlorite and chlorine
- C. Sodium chloride and chlorine
- D. Sodium hypochlorite and chlorine
-
76. When selecting a coagulant and a coagulant aid you should check for which of the following?
- A. Tempature
- B. Ph
- C. Hardness
- D. Alkalinity
- E. All of the above
-
77. What makes non-carbonate hardness?
- A. Hydroxides
- B . Carbonates
- C. Nitrates
- D. Bi-carbonates
- E. Soda ash
-
79. Temperature decreases what happens?
- A. Settling increases, chemical use increases
- B. Settling decreases, chemical use decreases
- C . Settling decreases, chemical use increases
- D. Settling stays the same, chemical use stays the same
- E. Doesn't matter because I'm moving to Florida
-
80. Filter sand size increase do to?
- A. Over feed soda - ash
- B. Over feed carbonization
- C. Under feed carbonization
- D. Under feed soda - ash
- E. Too long of a filter back wash
-
8 1. Required to monitor for which inorganic?
- A. Fluoride, arsenic, nitrates and nitrite
- B. Arsenic, antimony, and cadmium
- C. Fluoride, asbestos, and cyanide
- D. Mercury, selenium, and thallium
- E. Nitrate, nitrite, selenium
-
82. How to calculate pump draw down?
- A. Static level - cone of depression
- B. Ground level - pump centerline
- C. Pump centerline - draw down level
- D. Cone of depression - pump center line
- E. Cone of depression - static level
-
83. What does MRDL stand for?
- A. Mean Residual Detection Limit
- B. Maximum Residual Detection Limit
- C. Minimum Resident Duration Length
- D. Minimum Range Detection Length
- E. Minimum Range Detection Limit
-
84. Which of the following is not a physical characteristic of water?
- A. Temperature
- B. Color
- C. Taste
- D. Odor
- E. Hardness
-
85. Which of the following is not a sludge thickening process?
- A. Drying beds
- B. Slow sand filter
- C . Spiractor equipment
- D. Belt press
- E. Micro waving
-
86. Which process does not remove Fe and Mn?
- A. Base exchange
- B. Filtration
- C. Flocculation
- D. Oxidizing
- E. Aeration
-
87. What is the minim distance f?om a sewer line to a water main laying horizontal to each other under ground?
- A. There are no limits
- B. 20 Feet
- C. 22 Feet
- D. 10 Feet
- E. 5 feet
-
88. What is the minium distance a water line can be placed under a sewer main underground?
- A. 24 inches
- B. 36 inches
- C. 48 inches
- D. 18 inches
- E. None of .the above
-
89. What is .the minium distance a water line can be placed over a sewer main underground?
- A. 24 inches
- B. 36 inches
- C. 18inches
- D. 48 inches
- E. None of the above
-
90. How are three phase motors usually protected?
- A. Circuit breakers
- B. Fuses
- C. Amp meters
- D. Transformers
- E. Overload relays
-
9 1 . What does MPN stand for?
- A. Maxim Population Number
- B. Minium Population Number
- C. Maxim Phosphorus Neutrons
- D. Most Probable Number
- E. Most Potable Number
-
92. What does IDLH stand for?
- A. Immediately Dangerous to Life or Health
- B. Intermediate Dial Left on Hand Operation
- C . Indefinite Direction Left-hand Turn
- D. Immediately Dangers do to Lighting and Hale
- E. Indefinite Destruction to Life and Health
-
93. What does the Vacuum Regulator - Check Unit do on a chlorine feed system?
- A. Regulations chlorine feed rate manually
- B. Maintains a constant vacuum on chlorinator
- C. Discharges solution mixture of chlorine and water
- D. Mixes or injects chlorine gas into water supply
- E. Provides source of air to reduce excess vacuum
-
94. The unit used to measure current strength.
- A. Ampere
- B. Watt
- C. Volt
- D. Kilowatt hour
- E. Current
-
95. Why are zinc and magnesium commonly used as sacrificial anodes in water tanks and or for buried pipes?
- A. Last longer than other metals in corrosive waters
- B. They will not corrode
- C. They form a protective coating over other metals
- D. They corrode preferentially to aluninum and iron
- E. They are the cheapest thing that we can find
-
96. Which of the following chemical factors influence corrosion?
- A. pH
- B. Dissolved solids
- C. Dissolved oxygen
- D. Hardness
- E. Alkalinity
-
97. Which chemicals should be added to achieve calcium carbonate saturation in waters with high levels of hardness and alkalinity?
- A. Soda ash
- B. Hydrated lime
- C . Calcium hydroxide
- D. Caustic soda
- E. Quicklime
-
98. What are the health effects fkom copper in drinking water?
- A. Stomach and intestinal distress
- B. Increased blood pressure
- C. Cancer
- D. Deficits in hearing
- E. All the above
-
99. How can a water utility anticipate the onset of a taste and odor episode?
- A. By sampling and analyzing raw water
- B. By keeping complete and accurate records of out breaks
- C. By expecting health department to warn utility in advance
- D. By relying on consumers to anticipate outbreaks
- E. Just wait for them to happen and apologize
-
100. Where is powdered activated carbon often applied?
- A. At flocculation tariks
- B. After filtration
- C. After chlorination
- D. Out in distribution system
- E. At flash mixer
-
101. What is the best early warning of wastewater contamination of the source of water?
- A. An increase in raw water flows
- B. A failure of a bacteriological test
- C. An increase in coliform counts
- D. A sudden drop in chlorine residual
- E. A sudden bloom of algae
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