ADEQ Water Treatment Grade 1 Exam
with Questions and Correct Answers
Latest 2025-2026 GRADED A+
Hypochlorinators ,can ,become ,clogged ,with ,calcium ,carbonate. ,This ,material ,can ,be
,removed ,by ,pumping ,a ,dilute ,solution ,of ,________________ ,through ,the ,pump,
,hoses, ,and ,diffuser. ,- ,CORRECT ,ANSWER-HCl ,- ,Hydrochloric ,Acid
Chlorine ,gas ,can ,kill ,a ,person ,after ,just ,a ,few ,breaths ,at ,concentrations ,as ,low ,as
,_____________. ,- ,CORRECT ,ANSWER-0.1%
What ,is ,the ,purpose ,of ,packing ,in ,a ,pump? ,- ,CORRECT ,ANSWER-Control ,water
,leakage ,along ,the ,pump's ,shaft
What ,is ,motor ,horsepower? ,- ,CORRECT ,ANSWER-The ,horsepower ,equivalent ,to ,the
,watts ,of ,electric ,power ,supplied ,to ,a ,motor
A ,shaft ,transmits ,_________________ ,from ,the ,motor ,to ,the ,impeller. ,- ,CORRECT
,ANSWER-Torque
To ,prevent ,frosting, ,what ,is ,the ,maximum ,withdrawal ,rate ,for ,a ,1-ton ,chlorine
,container ,with ,a ,backpressure ,of ,35 ,psi ,at ,room ,temperature? ,- ,CORRECT
,ANSWER-400 ,lbs/day
What ,is ,brake ,horsepower? ,- ,CORRECT ,ANSWER-The ,power ,supplied ,to ,a ,pump ,by
,a ,motor
What ,is ,the ,primary ,reason ,filters ,are ,difficult ,to ,clean? ,- ,CORRECT ,ANSWER-Sticky
,floc ,adsorbs ,to ,the ,media
What ,is ,water ,horsepower? ,- ,CORRECT ,ANSWER-The ,portion ,of ,the ,power
,delivered ,to ,a ,pump ,that ,is ,actually ,used ,to ,lift ,water
Chlorine ,scrubbers ,are ,designed ,to ,neutralize ,up ,to ,____________lbs ,of ,chlorine. ,-
,CORRECT ,ANSWER-2,000 ,lbs
There ,are ,many ,causes ,for ,bearing ,failure, ,what ,is ,the ,most ,common ,reason? ,-
,CORRECT ,ANSWER-Poor ,lubrication ,practices
,What ,metal ,will ,be ,the ,anode ,from ,the ,following ,list ,because ,it ,is ,most ,active?
A) ,Tin
B) ,Brass
C) ,Mild ,Steel
D) ,Copper ,- ,CORRECT ,ANSWER-C) ,Mild ,Steel
What ,kind ,of ,water ,is ,a ,poor ,conductor ,of ,electricity? ,- ,CORRECT ,ANSWER-
Deionized ,water
Destruction ,of ,pathogenic ,organisms ,by ,chlorine ,is ,directly ,related ,to ,____________.
,- ,CORRECT ,ANSWER-Chlorine ,concentration ,and ,contact ,time
The ,valves ,on ,chlorine ,cylinders ,and ,ton ,containers ,must ,comply ,with ,standards ,set
,by? ,- ,CORRECT ,ANSWER-Chlorine ,Institute
Surface ,wash ,systems ,for ,filters ,agitate ,the ,top ,______________ ,inches ,of ,media. ,-
,CORRECT ,ANSWER-2 ,inches
What ,disinfection ,treatment ,process ,requires ,a ,monitoring ,procedure, ,other ,than
,residual ,monitoring, ,to ,determine ,its ,efficiency? ,- ,CORRECT ,ANSWER-Ultraviolet
As ,water ,flows ,through ,the ,volute, ,the ,pressure ,head ,___________________ ,and ,the
,velocity ,head ,_____________________. ,- ,CORRECT ,ANSWER-Increases,
,decreases
A ,pressure-differential ,meter ,is ,a ,flow-measuring ,device ,that ,creates ,and ,measures ,a
,difference ,in ,pressure ,________________________ ,to ,the ,rate ,of ,flow. ,- ,CORRECT
,ANSWER-Proportional
The ,following ,procedure ,is ,safe ,for ,changing ,out ,chlorine ,cylinders ,or ,1-ton
,containers:
A) ,After ,removing ,the ,brass ,outlet ,cap, ,clean ,the ,valve ,and ,threads ,with ,a ,wire ,brush
B) ,Always ,use ,a ,new ,washer
C) ,Always ,have ,a ,personal ,protective ,respirator ,nearby
D) ,All ,of ,the ,above ,- ,CORRECT ,ANSWER-D ,- ,All ,of ,the ,above
What ,is ,the ,most ,difficult ,and ,expensive ,physical ,measurement ,taken ,in ,a ,water
,plant? ,- ,CORRECT ,ANSWER-Water ,Flow
If ,a ,treatment ,plant ,softens ,water, ,where ,should ,samples ,be ,collected ,to ,determine ,if
,the ,desired ,result ,of ,softening ,has ,been ,achieved? ,- ,CORRECT ,ANSWER-
Immediately ,after ,softening ,and ,before ,the ,clear ,well
Coliform ,bacteria ,will ,produce ,gas ,in ,lactose ,or ,lauryl ,tryptose ,broth ,at ,35.5C ,within
,______________ ,hours. ,- ,CORRECT ,ANSWER-24-48 ,Hours
, The ,number ,of ,samples ,under ,the ,Total ,Coliform ,Rule ,that ,a ,water ,system ,must
,collect ,depends ,on ,the ,_________________. ,- ,CORRECT ,ANSWER-Number ,of
,customers ,served
Drinking ,water ,samples ,to ,be ,tested ,for ,total ,coliforms ,should ,be ,tested ,the ,same ,day
,they ,are ,collected, ,but ,they ,can ,be ,refrigerated ,for ,__________________ ,hours
,before ,analysis. ,- ,CORRECT ,ANSWER-8 ,hours
What ,type ,of ,laboratory ,equipment ,is ,highly ,resistant ,to ,heat, ,sudden ,temperature
,change, ,and ,chemical ,attack? ,- ,CORRECT ,ANSWER-Porcelain ,dishes
The ,total ,hardness ,and ,the ,total ,alkalinity ,of ,water ,are ,used ,to ,calculate
,__________________ ,hardness. ,- ,CORRECT ,ANSWER-carbonate ,and
,noncarbonate ,hardness
What ,group ,of ,organisms ,are ,measures ,that, ,if ,present, ,might ,indicate ,the ,presence
,of ,pathogens? ,- ,CORRECT ,ANSWER-Coliform ,bacteria
Alkalinity ,is ,defined ,as ,_________________________. ,- ,CORRECT ,ANSWER-A
,measurement ,of ,the ,water's ,capacity ,to ,neutralize ,an ,acid
What ,should ,be ,done ,with ,the ,lid ,while ,collecting ,a ,bacteriological ,sample? ,-
,CORRECT ,ANSWER-Hold ,the ,cap, ,threads ,down, ,while ,collecting ,the ,sample ,with
,the ,other ,hand
The ,zeta ,potential ,is ,defined ,as ,a ,force ,that ,will ,keep ,______________ ,apart ,and
,keep ,them ,suspended. ,- ,CORRECT ,ANSWER-Very ,small ,colloidal ,particles
The ,saturation ,point ,of ,a ,chemical ,in ,water ,varies ,with:
A) ,pH
B) ,total ,dissolved ,solids
C) ,temperature
D) ,all ,of ,the ,above ,- ,CORRECT ,ANSWER-D ,- ,all ,of ,the ,above
Why ,is ,it ,important ,to ,label ,the ,contents ,of ,all ,containers ,that ,carry ,materials ,or
,solutions ,in ,a ,water ,plant?
A) ,To ,prevent ,mixing ,of ,incompatible ,materials
B) ,To ,prevent ,unwanted ,reactions ,affecting ,health ,and ,safety
C) ,To ,prevent ,losing ,a ,sample
D) ,All ,of ,the ,above ,- ,CORRECT ,ANSWER-D ,- ,All ,of ,the ,above
A ,confined ,space ,is ,defined ,as ,_______________
A) ,A ,space ,that ,must ,have ,limited ,means ,of ,entry ,and ,exit
B) ,A ,space ,that ,must ,not ,be ,designed ,for ,continuous ,human ,occupancy
with Questions and Correct Answers
Latest 2025-2026 GRADED A+
Hypochlorinators ,can ,become ,clogged ,with ,calcium ,carbonate. ,This ,material ,can ,be
,removed ,by ,pumping ,a ,dilute ,solution ,of ,________________ ,through ,the ,pump,
,hoses, ,and ,diffuser. ,- ,CORRECT ,ANSWER-HCl ,- ,Hydrochloric ,Acid
Chlorine ,gas ,can ,kill ,a ,person ,after ,just ,a ,few ,breaths ,at ,concentrations ,as ,low ,as
,_____________. ,- ,CORRECT ,ANSWER-0.1%
What ,is ,the ,purpose ,of ,packing ,in ,a ,pump? ,- ,CORRECT ,ANSWER-Control ,water
,leakage ,along ,the ,pump's ,shaft
What ,is ,motor ,horsepower? ,- ,CORRECT ,ANSWER-The ,horsepower ,equivalent ,to ,the
,watts ,of ,electric ,power ,supplied ,to ,a ,motor
A ,shaft ,transmits ,_________________ ,from ,the ,motor ,to ,the ,impeller. ,- ,CORRECT
,ANSWER-Torque
To ,prevent ,frosting, ,what ,is ,the ,maximum ,withdrawal ,rate ,for ,a ,1-ton ,chlorine
,container ,with ,a ,backpressure ,of ,35 ,psi ,at ,room ,temperature? ,- ,CORRECT
,ANSWER-400 ,lbs/day
What ,is ,brake ,horsepower? ,- ,CORRECT ,ANSWER-The ,power ,supplied ,to ,a ,pump ,by
,a ,motor
What ,is ,the ,primary ,reason ,filters ,are ,difficult ,to ,clean? ,- ,CORRECT ,ANSWER-Sticky
,floc ,adsorbs ,to ,the ,media
What ,is ,water ,horsepower? ,- ,CORRECT ,ANSWER-The ,portion ,of ,the ,power
,delivered ,to ,a ,pump ,that ,is ,actually ,used ,to ,lift ,water
Chlorine ,scrubbers ,are ,designed ,to ,neutralize ,up ,to ,____________lbs ,of ,chlorine. ,-
,CORRECT ,ANSWER-2,000 ,lbs
There ,are ,many ,causes ,for ,bearing ,failure, ,what ,is ,the ,most ,common ,reason? ,-
,CORRECT ,ANSWER-Poor ,lubrication ,practices
,What ,metal ,will ,be ,the ,anode ,from ,the ,following ,list ,because ,it ,is ,most ,active?
A) ,Tin
B) ,Brass
C) ,Mild ,Steel
D) ,Copper ,- ,CORRECT ,ANSWER-C) ,Mild ,Steel
What ,kind ,of ,water ,is ,a ,poor ,conductor ,of ,electricity? ,- ,CORRECT ,ANSWER-
Deionized ,water
Destruction ,of ,pathogenic ,organisms ,by ,chlorine ,is ,directly ,related ,to ,____________.
,- ,CORRECT ,ANSWER-Chlorine ,concentration ,and ,contact ,time
The ,valves ,on ,chlorine ,cylinders ,and ,ton ,containers ,must ,comply ,with ,standards ,set
,by? ,- ,CORRECT ,ANSWER-Chlorine ,Institute
Surface ,wash ,systems ,for ,filters ,agitate ,the ,top ,______________ ,inches ,of ,media. ,-
,CORRECT ,ANSWER-2 ,inches
What ,disinfection ,treatment ,process ,requires ,a ,monitoring ,procedure, ,other ,than
,residual ,monitoring, ,to ,determine ,its ,efficiency? ,- ,CORRECT ,ANSWER-Ultraviolet
As ,water ,flows ,through ,the ,volute, ,the ,pressure ,head ,___________________ ,and ,the
,velocity ,head ,_____________________. ,- ,CORRECT ,ANSWER-Increases,
,decreases
A ,pressure-differential ,meter ,is ,a ,flow-measuring ,device ,that ,creates ,and ,measures ,a
,difference ,in ,pressure ,________________________ ,to ,the ,rate ,of ,flow. ,- ,CORRECT
,ANSWER-Proportional
The ,following ,procedure ,is ,safe ,for ,changing ,out ,chlorine ,cylinders ,or ,1-ton
,containers:
A) ,After ,removing ,the ,brass ,outlet ,cap, ,clean ,the ,valve ,and ,threads ,with ,a ,wire ,brush
B) ,Always ,use ,a ,new ,washer
C) ,Always ,have ,a ,personal ,protective ,respirator ,nearby
D) ,All ,of ,the ,above ,- ,CORRECT ,ANSWER-D ,- ,All ,of ,the ,above
What ,is ,the ,most ,difficult ,and ,expensive ,physical ,measurement ,taken ,in ,a ,water
,plant? ,- ,CORRECT ,ANSWER-Water ,Flow
If ,a ,treatment ,plant ,softens ,water, ,where ,should ,samples ,be ,collected ,to ,determine ,if
,the ,desired ,result ,of ,softening ,has ,been ,achieved? ,- ,CORRECT ,ANSWER-
Immediately ,after ,softening ,and ,before ,the ,clear ,well
Coliform ,bacteria ,will ,produce ,gas ,in ,lactose ,or ,lauryl ,tryptose ,broth ,at ,35.5C ,within
,______________ ,hours. ,- ,CORRECT ,ANSWER-24-48 ,Hours
, The ,number ,of ,samples ,under ,the ,Total ,Coliform ,Rule ,that ,a ,water ,system ,must
,collect ,depends ,on ,the ,_________________. ,- ,CORRECT ,ANSWER-Number ,of
,customers ,served
Drinking ,water ,samples ,to ,be ,tested ,for ,total ,coliforms ,should ,be ,tested ,the ,same ,day
,they ,are ,collected, ,but ,they ,can ,be ,refrigerated ,for ,__________________ ,hours
,before ,analysis. ,- ,CORRECT ,ANSWER-8 ,hours
What ,type ,of ,laboratory ,equipment ,is ,highly ,resistant ,to ,heat, ,sudden ,temperature
,change, ,and ,chemical ,attack? ,- ,CORRECT ,ANSWER-Porcelain ,dishes
The ,total ,hardness ,and ,the ,total ,alkalinity ,of ,water ,are ,used ,to ,calculate
,__________________ ,hardness. ,- ,CORRECT ,ANSWER-carbonate ,and
,noncarbonate ,hardness
What ,group ,of ,organisms ,are ,measures ,that, ,if ,present, ,might ,indicate ,the ,presence
,of ,pathogens? ,- ,CORRECT ,ANSWER-Coliform ,bacteria
Alkalinity ,is ,defined ,as ,_________________________. ,- ,CORRECT ,ANSWER-A
,measurement ,of ,the ,water's ,capacity ,to ,neutralize ,an ,acid
What ,should ,be ,done ,with ,the ,lid ,while ,collecting ,a ,bacteriological ,sample? ,-
,CORRECT ,ANSWER-Hold ,the ,cap, ,threads ,down, ,while ,collecting ,the ,sample ,with
,the ,other ,hand
The ,zeta ,potential ,is ,defined ,as ,a ,force ,that ,will ,keep ,______________ ,apart ,and
,keep ,them ,suspended. ,- ,CORRECT ,ANSWER-Very ,small ,colloidal ,particles
The ,saturation ,point ,of ,a ,chemical ,in ,water ,varies ,with:
A) ,pH
B) ,total ,dissolved ,solids
C) ,temperature
D) ,all ,of ,the ,above ,- ,CORRECT ,ANSWER-D ,- ,all ,of ,the ,above
Why ,is ,it ,important ,to ,label ,the ,contents ,of ,all ,containers ,that ,carry ,materials ,or
,solutions ,in ,a ,water ,plant?
A) ,To ,prevent ,mixing ,of ,incompatible ,materials
B) ,To ,prevent ,unwanted ,reactions ,affecting ,health ,and ,safety
C) ,To ,prevent ,losing ,a ,sample
D) ,All ,of ,the ,above ,- ,CORRECT ,ANSWER-D ,- ,All ,of ,the ,above
A ,confined ,space ,is ,defined ,as ,_______________
A) ,A ,space ,that ,must ,have ,limited ,means ,of ,entry ,and ,exit
B) ,A ,space ,that ,must ,not ,be ,designed ,for ,continuous ,human ,occupancy
