Water Treatment Final Exam
Questions and Answers A+ Graded
(2025)
Whats .a .rapid .method .of .estimating .total .dissolved .content .of .a .water .supply? .-
.CORRECT .ANSWER-Specific .conductance
Waterfall .aeration .devices .may .cause .what .type .of .problems? .- .CORRECT
.ANSWER-Encourage .biological .growth
If .a .person .is .poisoned .by .inhaling .fluoride .what .is .the .first .symptom? .-
.CORRECT .ANSWER-Sharp .biting .pain .to .the .nose .followed .by .a .runny .nose .or
.a .nose .bleed
Drinking .water .waste .is .considered .what .type .of .waste? .- .CORRECT .ANSWER-
Industrial
pH .kept .at .____ .will .precipitate .calcium .carbonate? .- .CORRECT .ANSWER-10
Excess .pink .water .can .be .caused .by .what? .- .CORRECT .ANSWER-Potassium
.permanganate .overdose
Pressure .in .a .distribution .system .should .not .fall .below .what .level? .- .CORRECT
.ANSWER-20psi
What .is .the .MCL .for .Trihalomethanes .- .CORRECT .ANSWER-0.08 .milligrams .per
.liter
Shortened .filter .runs .can .occur .because .of .air .bound .filters, .why .is .this? .-
.CORRECT .ANSWER-Caused .by .the .release .of .dissolved .air .in .saturated .cold
.water .due .to .a .decrease .in .pressure
What .is .the .most .expensive .aeration .device? .- .CORRECT .ANSWER-Mechanical
In .the .Ion .exchange .process, .calcium(Ca) .and .magnesium(Mg) .Ions .are
.exchanged .for .what? .- .CORRECT .ANSWER-Na- .Ions
, What .are .the .four .stages .of .the .operation .of .an .ion .exchange .softener? .-
.CORRECT .ANSWER-Service, .Brine, .Backwash, .Rinse
What .is .the .chief .cause .of .accidents? .- .CORRECT .ANSWER-Carelessness/
.negligence
Drinking .water .should .be .free .of .what .2 .things? .- .CORRECT .ANSWER-Bacteria
.and .toxins
Ton .tanks .have .how .many .fusible .metal .safety .plugs .on .each .ends? .-
.CORRECT .ANSWER-3 .to .4- .each .side
If .you .have .positive .sample .for .total .coliform, .do .what? .- .CORRECT .ANSWER-
Repeat .samples .are .required .(3) .tap .upstream .and .downstream
Filters .are .clogged .by .what, .that .can .cause .head .loss? .- .CORRECT .ANSWER-
Algae/ .aquatic .micro .organisms
What .is .the .meaning .of .eutrophic .- .CORRECT .ANSWER-High .nutrient .content
What .is .a .bubbler .tube .used .for? .- .CORRECT .ANSWER-Measuring .the .depths
.of .a .well
What .is .the .primary .advantage .of .vacuum .system .chlorination? .- .CORRECT
.ANSWER-Safety
When .chlorine .and .ammonia .are .added .to .water .what .is .formed? .- .CORRECT
.ANSWER-Chloramines
What .is .tapered .energy .mixing? .- .CORRECT .ANSWER-Reduction .of .speed .or
.surface .area .of .the .paddle .or .basin
What .is .the .best .appearance .of .a .floc .particle? .- .CORRECT .ANSWER-Discrete
.(separate) .fairly .dense
What .is .a .cross .connection? .- .CORRECT .ANSWER-Connection .between .a
.drinking .water .supply .and .a .unapproved .water .supply
What .is .the .meaning .of .MCL? .- .CORRECT .ANSWER-Maximum .contaminant
.level, .(largest .allowable .amount)
What .is .multi .media? .- .CORRECT .ANSWER-Sand ., .anthracite .coal, .garnet
Hydrochloric .acid .reacts .with .what .to .form .hydrogen .gas? .- .CORRECT
.ANSWER-Metal
Venturi's .propellar .meters, .etc ..... .Are .used .to .measure .what? .- .CORRECT
.ANSWER-Flows
Questions and Answers A+ Graded
(2025)
Whats .a .rapid .method .of .estimating .total .dissolved .content .of .a .water .supply? .-
.CORRECT .ANSWER-Specific .conductance
Waterfall .aeration .devices .may .cause .what .type .of .problems? .- .CORRECT
.ANSWER-Encourage .biological .growth
If .a .person .is .poisoned .by .inhaling .fluoride .what .is .the .first .symptom? .-
.CORRECT .ANSWER-Sharp .biting .pain .to .the .nose .followed .by .a .runny .nose .or
.a .nose .bleed
Drinking .water .waste .is .considered .what .type .of .waste? .- .CORRECT .ANSWER-
Industrial
pH .kept .at .____ .will .precipitate .calcium .carbonate? .- .CORRECT .ANSWER-10
Excess .pink .water .can .be .caused .by .what? .- .CORRECT .ANSWER-Potassium
.permanganate .overdose
Pressure .in .a .distribution .system .should .not .fall .below .what .level? .- .CORRECT
.ANSWER-20psi
What .is .the .MCL .for .Trihalomethanes .- .CORRECT .ANSWER-0.08 .milligrams .per
.liter
Shortened .filter .runs .can .occur .because .of .air .bound .filters, .why .is .this? .-
.CORRECT .ANSWER-Caused .by .the .release .of .dissolved .air .in .saturated .cold
.water .due .to .a .decrease .in .pressure
What .is .the .most .expensive .aeration .device? .- .CORRECT .ANSWER-Mechanical
In .the .Ion .exchange .process, .calcium(Ca) .and .magnesium(Mg) .Ions .are
.exchanged .for .what? .- .CORRECT .ANSWER-Na- .Ions
, What .are .the .four .stages .of .the .operation .of .an .ion .exchange .softener? .-
.CORRECT .ANSWER-Service, .Brine, .Backwash, .Rinse
What .is .the .chief .cause .of .accidents? .- .CORRECT .ANSWER-Carelessness/
.negligence
Drinking .water .should .be .free .of .what .2 .things? .- .CORRECT .ANSWER-Bacteria
.and .toxins
Ton .tanks .have .how .many .fusible .metal .safety .plugs .on .each .ends? .-
.CORRECT .ANSWER-3 .to .4- .each .side
If .you .have .positive .sample .for .total .coliform, .do .what? .- .CORRECT .ANSWER-
Repeat .samples .are .required .(3) .tap .upstream .and .downstream
Filters .are .clogged .by .what, .that .can .cause .head .loss? .- .CORRECT .ANSWER-
Algae/ .aquatic .micro .organisms
What .is .the .meaning .of .eutrophic .- .CORRECT .ANSWER-High .nutrient .content
What .is .a .bubbler .tube .used .for? .- .CORRECT .ANSWER-Measuring .the .depths
.of .a .well
What .is .the .primary .advantage .of .vacuum .system .chlorination? .- .CORRECT
.ANSWER-Safety
When .chlorine .and .ammonia .are .added .to .water .what .is .formed? .- .CORRECT
.ANSWER-Chloramines
What .is .tapered .energy .mixing? .- .CORRECT .ANSWER-Reduction .of .speed .or
.surface .area .of .the .paddle .or .basin
What .is .the .best .appearance .of .a .floc .particle? .- .CORRECT .ANSWER-Discrete
.(separate) .fairly .dense
What .is .a .cross .connection? .- .CORRECT .ANSWER-Connection .between .a
.drinking .water .supply .and .a .unapproved .water .supply
What .is .the .meaning .of .MCL? .- .CORRECT .ANSWER-Maximum .contaminant
.level, .(largest .allowable .amount)
What .is .multi .media? .- .CORRECT .ANSWER-Sand ., .anthracite .coal, .garnet
Hydrochloric .acid .reacts .with .what .to .form .hydrogen .gas? .- .CORRECT
.ANSWER-Metal
Venturi's .propellar .meters, .etc ..... .Are .used .to .measure .what? .- .CORRECT
.ANSWER-Flows
