TCEQ CLASS D WATER OPERATOR LICENSE
EXAM WITH WELL VERIFIED QUESTIONS AND
ANSWERS|| ALREADY GRADED A+||
GUARANTEED PASS|| LATEST VERSION 2025
Bleach used in public water systems must be ___ approved.
A) AWWA
B) TEEX
C) OSHA
D) NSF - ANSWER-D
Sodium hypochlorite is a liquid ___.
A)bleach
B)sodium
C)chlorine
D)hydroxide - ANSWER-A
Calcium hypochlorite is made by reacting chlorine with ___.
A)sodium
B)lime
,C)bleach
D)salt - ANSWER-B
Calcium hypochlorite will cause explosions or fires if it contacts ___ material.
A)organic
B)inorganic
C)suspended
D)dissolved - ANSWER-A
At room temperature chlorine gas is greenish-yellow, has pungent odor, is ___
times heavier than air.
A)2
B)1.5
C)2.5
D)3 - ANSWER-C
The maximum sustained gas withdrawal rate from 150 lb cylinders (vacuum
transmission) is ___ lb/day per degree F
A)4
B)3
C)2
D)1 - ANSWER-D
Disinfection capacity for drinking water must be ___ percent greater than the
highest expected dosage.
A)30
,B)40
C)50
D)60 - ANSWER-C
A gallon of water weighs 8/34 pounds and 1 mg/l equal 1 ___.
A)million grams
B)thousand grams
C)part per thousand
D)part per million - ANSWER-D
Hydrogen sulfide is heavier than air, colorless, flammable, toxic, and has a ___
odor.
A)sweet
B)rotten egg
C)rotten fish
D)fragrant - ANSWER-B
Excessive nitrates in drinking water can cause ___ syndrome in infants.
A)bad baby
B)blue body
C)bloody baby
D)blue baby - ANSWER-D
Excessive amounts of fluoride may cause ___ or staining of teeth.
A)mottling
B)molding
, C)cracking
D)yellowing - ANSWER-A
Trihalomethanes and haloacetic acids are byproducts of chlorination and may
increase ___ risk.
A)mottled teeth
B)red water
C)typhoid
D)cancer - ANSWER-D
The action level for copper is 1.3 mg/l and for lead it is ___ mg/l.
A)15
B)1.5
C)0.015
D)0.15 - ANSWER-C
T/F: Aquifers are underground waterbearing formations yielding useful quantities
of water. - ANSWER-True
T/F: The quantity of water a formation yields depends on the thickness and
permeability of the formation. - ANSWER-T
T/F: Problems caused by overpumping are falling water levels and subsidence -
ANSWER-True
T/F: Well casing and cementing protects the well from collapse and surface
contamination. - ANSWER-True
EXAM WITH WELL VERIFIED QUESTIONS AND
ANSWERS|| ALREADY GRADED A+||
GUARANTEED PASS|| LATEST VERSION 2025
Bleach used in public water systems must be ___ approved.
A) AWWA
B) TEEX
C) OSHA
D) NSF - ANSWER-D
Sodium hypochlorite is a liquid ___.
A)bleach
B)sodium
C)chlorine
D)hydroxide - ANSWER-A
Calcium hypochlorite is made by reacting chlorine with ___.
A)sodium
B)lime
,C)bleach
D)salt - ANSWER-B
Calcium hypochlorite will cause explosions or fires if it contacts ___ material.
A)organic
B)inorganic
C)suspended
D)dissolved - ANSWER-A
At room temperature chlorine gas is greenish-yellow, has pungent odor, is ___
times heavier than air.
A)2
B)1.5
C)2.5
D)3 - ANSWER-C
The maximum sustained gas withdrawal rate from 150 lb cylinders (vacuum
transmission) is ___ lb/day per degree F
A)4
B)3
C)2
D)1 - ANSWER-D
Disinfection capacity for drinking water must be ___ percent greater than the
highest expected dosage.
A)30
,B)40
C)50
D)60 - ANSWER-C
A gallon of water weighs 8/34 pounds and 1 mg/l equal 1 ___.
A)million grams
B)thousand grams
C)part per thousand
D)part per million - ANSWER-D
Hydrogen sulfide is heavier than air, colorless, flammable, toxic, and has a ___
odor.
A)sweet
B)rotten egg
C)rotten fish
D)fragrant - ANSWER-B
Excessive nitrates in drinking water can cause ___ syndrome in infants.
A)bad baby
B)blue body
C)bloody baby
D)blue baby - ANSWER-D
Excessive amounts of fluoride may cause ___ or staining of teeth.
A)mottling
B)molding
, C)cracking
D)yellowing - ANSWER-A
Trihalomethanes and haloacetic acids are byproducts of chlorination and may
increase ___ risk.
A)mottled teeth
B)red water
C)typhoid
D)cancer - ANSWER-D
The action level for copper is 1.3 mg/l and for lead it is ___ mg/l.
A)15
B)1.5
C)0.015
D)0.15 - ANSWER-C
T/F: Aquifers are underground waterbearing formations yielding useful quantities
of water. - ANSWER-True
T/F: The quantity of water a formation yields depends on the thickness and
permeability of the formation. - ANSWER-T
T/F: Problems caused by overpumping are falling water levels and subsidence -
ANSWER-True
T/F: Well casing and cementing protects the well from collapse and surface
contamination. - ANSWER-True
