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CLASS D WATER OPERATOR
LICENSE EXAM TCEQ BRAND NEW
ACTUAL EXAM WITH ANSWERS.
T/F: Limit flag use to emergency situations and at locations
controlled by a single flagger. - correct answer -True
The spoil should be placed no closer than ___ft from the edge of
the excavation. - correct answer -2 ft
For day or night work, a flagger's clothing can be blue or brown. -
correct answer -False
Which of the following is part of a hypochlorination system?
a) solution feed pump
b) gas cylinder
c) rotameter
d) injector/ejector
e) all of the above - correct answer -a) solution feed pump
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An elevated storage tank should be protected against corrosion
by:
a) painting
b) cathodic protection
c) water stabilization
d) all of the above
e) galvanizing - correct answer -d) all of the above (painting,
cathodic protection, and water stabilization)
The pH of water indicates whether it is acidic or basic and is
expressed by a scale of numbers ranging from:
a) 0 - 7
b) 0 - 14
c) 1 - 7
d) 1 - 14
e) none of the above - correct answer -b) 0 - 14
Before a new main is placed into service, it must be properly
disinfected with a minimum chlorine dosage of:
a) 50 mg/L
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b) 30 mg/L
c) 40 mg/L
d) 75 mg/L
e) 25 mg/L - correct answer -a) 50 mg/L
A common chemical used for disinfecting a small public water
supply is:
a) soda ash
b) copper sulfate
c) sodium hypochlorite
d) fluoride
e) sodium chloride - correct answer -c) sodium hypochlorite
Gravity filters will remove which of the following from surface
water supplies:
a) turbidity
b) taste and odors
c) nitrates
d) hardness
e) chlorides - correct answer -a) turbidity
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If you added 3.5 mg/L of chlorine to your storage tank and 30
minutes later measured the residual at 1.2 mg/L, what was the
chlorine demand in the tank?
a) 4.2
b) 2.9
c) 0.3
d) 2.3
e) 4.7 - correct answer -d) 2.3
Your ground storage tank is 15 feet high and 30 feet in diameter.
About how much water can it hold?
a) 31,700 gallons
b) 79,270 gallons
c) 50, 490 gallons
d) 25,150 gallons
e) 10,600 gallons - correct answer -...
When fecal coliform organisms are found in a water supply, it is
an indication that:
a) the water supply is contaminated
b) pathogenic organisms might be present
c) the water may be unsuitable for drinking
CLASS D WATER OPERATOR
LICENSE EXAM TCEQ BRAND NEW
ACTUAL EXAM WITH ANSWERS.
T/F: Limit flag use to emergency situations and at locations
controlled by a single flagger. - correct answer -True
The spoil should be placed no closer than ___ft from the edge of
the excavation. - correct answer -2 ft
For day or night work, a flagger's clothing can be blue or brown. -
correct answer -False
Which of the following is part of a hypochlorination system?
a) solution feed pump
b) gas cylinder
c) rotameter
d) injector/ejector
e) all of the above - correct answer -a) solution feed pump
, Page | 2
An elevated storage tank should be protected against corrosion
by:
a) painting
b) cathodic protection
c) water stabilization
d) all of the above
e) galvanizing - correct answer -d) all of the above (painting,
cathodic protection, and water stabilization)
The pH of water indicates whether it is acidic or basic and is
expressed by a scale of numbers ranging from:
a) 0 - 7
b) 0 - 14
c) 1 - 7
d) 1 - 14
e) none of the above - correct answer -b) 0 - 14
Before a new main is placed into service, it must be properly
disinfected with a minimum chlorine dosage of:
a) 50 mg/L
, Page | 3
b) 30 mg/L
c) 40 mg/L
d) 75 mg/L
e) 25 mg/L - correct answer -a) 50 mg/L
A common chemical used for disinfecting a small public water
supply is:
a) soda ash
b) copper sulfate
c) sodium hypochlorite
d) fluoride
e) sodium chloride - correct answer -c) sodium hypochlorite
Gravity filters will remove which of the following from surface
water supplies:
a) turbidity
b) taste and odors
c) nitrates
d) hardness
e) chlorides - correct answer -a) turbidity
, Page | 4
If you added 3.5 mg/L of chlorine to your storage tank and 30
minutes later measured the residual at 1.2 mg/L, what was the
chlorine demand in the tank?
a) 4.2
b) 2.9
c) 0.3
d) 2.3
e) 4.7 - correct answer -d) 2.3
Your ground storage tank is 15 feet high and 30 feet in diameter.
About how much water can it hold?
a) 31,700 gallons
b) 79,270 gallons
c) 50, 490 gallons
d) 25,150 gallons
e) 10,600 gallons - correct answer -...
When fecal coliform organisms are found in a water supply, it is
an indication that:
a) the water supply is contaminated
b) pathogenic organisms might be present
c) the water may be unsuitable for drinking
