Kansas Water Treatment Class 1 Study Test
Have not taken the test yet but KDHE website recommends studying Cal State Water treatment class materials so I wrote these from 437 page PDF. You're welcome. I ll update after I actually take the test.
- 1.The 2 most important factors impacting the effectiveness of chlorination are
- A.
PH of the water and the content of foreign substances in the water.
- B.
Concentration of chlorine and content of foreign substances in the water
- C.
Concentration of chlorine and contact time
- D.
PH and Temperature of water
- 2.The treatment process that controls corrosion or scaling is known as
- A.
Chemical control
- B.
Stabilization
- C.
Passivation
- D.
Corrosion kinetics
- 3.Permanganate reactions are highly dependent on
- A.
Organics in the water
- B.
PH
- C.
Temperature
- D.
Alkalinity
- 4.It is hardest to kill the organism that causes which of the following illnesses?
- A.
Cholera
- B.
Typhoid
- C.
Cryptosporidiosis
- D.
Infectious hepatitis
- 5.Disinfection of water wells with free chlorine requires exposure for at a concentration of .
- A.
6 to 12 hours; 25 mg/L
- B.
12 to 24 hours; 25 mg/L
- C.
12 to 24 hours; 50 mg/L
- D.
12 to 48 hours; 100 mg/L
- 6.Under no circumstances should a composite sample be collected for which type of analysis?
- A.
Bacteriological
- B.
Total dissolved solids
- C.
Alkalinity
- D.
Turbidity
- 7.The number of monthly distribution system chlorine residual samples required is
- A.
Based on water withdrawal permit limit.
- B.
Based on system size.
- C.
Based on population.
- D.
Different for each state.
- 8.Which is (are) the ideal indicator for pathogens?
- A.
Salmonella species
- B.
Coliform group bacteria
- C.
Gram-negative cocci
- D.
Gram-negative coccobacilli
- 9.When one substance is dissolved in another and will not settle out, which is the product called?
- A.
An emulsion
- B.
A compound
- C.
A suspension
- D.
A solution
- 10.Acids,bases, and salts lacking carbon are
- A.
Ketones.
- B.
Aldehydes
- C.
Organic compounds
- D.
Inorganic compounds.
- 11.How many coliform positive samples are allowed each month for water systems that collect less than 40 samples per month?
- A.
1
- B.
2
- C.
3
- D.
4
- 12.If a water sample tests positive for coliforms, the system must collect a set of repeat samples within
- A.
18 hours
- B.
24 hours
- C.
36 hours
- D.
48 hours
- 13.A public water system has at least service connections or serves or more persons or more days each year.
- A.
15 ;50; 50
- B.
25; 25; 50
- C.
15; 25; 60
- D.
25; 50; 60
- 14.Where are the sampling points located for required sampling of coliform bacteria in a community water system?
- A.
At consumers' faucets
- B.
75% at locations representative of population distribution and 25% at the farthest point in the system.
- C.
At points where water enters the distribution system
- D.
At representative points within the distribution system.
- 15.The main purpose mechanical seals is to
- A.
Keep lubrication in and other foreign materials out.
- B.
Control water leakage from stuffing box
- C.
Prevent water leakage from the pump shaft
- D.
Help prevent shaft from warping
- 16.Which part of a pump houses the packing or mechanical seal?
- A.
The shroud
- B.
The stuffing box
- C.
The volute
- D.
The casing head
- 17.Which is the only type of pump that can be operated against a closed valve?
- A.
Vertical turbine pump
- B.
Centrifugal pump
- C.
Axial-flow pump
- D.
Mixed-flow pump
- 18.Which is a principal problem associated with preliminary treatment screening?
- A.
Broken screens
- B.
Excessive downtime due to numerous shear pins being broken
- C.
Clogging
- D.
Chain comes out of foot sprocket
- 19.Which adverse effects does the secondary contaminant manganese have?
- A.
Unappealing to drink, undesirable taste, and possible indication of corrosion
- B.
Discolored laundry and changed taste of water, coffee, tea, and other beverages
- C.
Undesirable metallic taste and possible indication of corrosion
- D.
Added total dissolved solids and scale, indication of sewage contamination and tastes.
- 20.A physical property, as oppose to a chemical property, import to water treatment is
- A.
Turbidity
- B.
PH
- C.
Dissolved Solids
- D.
Electrical conductivity
- 21.In general, which causes an increase in taste and odors when natural waters lack dissolved oxygen?
- A.
Increase in algae growth
- B.
PH reduction causing an increase in iron and manganese going into solution
- C.
Anaerobic decomposition
- D.
Oxidation of organic material
- 22.What are two principal chemicals that cause water hardness
- A.
Aluminum and iron
- B.
Aluminum and calcium
- C.
Iron and manganese
- D.
Calcium and magnesium
- 23.Detention time in flocculation basins are usually designed to provide for
- A.
5 to 15 minutes
- B.
15 to 45 minutes
- C.
45 to 60 minutes
- D.
60 to 90 minutes
- 24.Alum works best in a pH range of
- A.
Less than 4.0
- B.
4.0 to 5.5
- C.
5.8 to 8.5
- D.
Greater than 9.0
- 25.Which statement is true concerning colloidal particles?
- A.
Colloidal particles are so small that gravity has little effect on them
- B.
The zeta potential between colloidal particles is balanced by covalent bonding
- C.
Electrical phenomenon of colloidal particles predominate and control their behavior
- D.
The surface area of colloidal particles is very small compared to their mass
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