2025 CLASS D WATER OPERATOR LICENSE
EXAM TCEQ AND CLASS B WITH 250
QUESTIONS AND VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
GUARANTEED PASS | CLASS B AND D TCEQ
WATER OPERATOR LICENSE LATEST 2025
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 - 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 - ANSWER-a) turbidity
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 - ANSWER-d) 2.3
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
d) follow-up sampling must take place
e) all of the above - ANSWER-e) all of the above
Which of the following is an acceptable level of residual chlorine in the far reaches
of a distribution system?
a) 0.2 mg/L of free chlorine for a small GWS
b) 0.5 mg/L of chloramine for a large SWS
c) 1.0 mg/L of combined when using ammoniation facilities
d) 1.0 mg/L of total for a large SWS
e) all of the above - ANSWER-e) all of the above
The purpose of an air line on a well is to:
a) aerate the well
b) determine the depth of the aquifer
c) inject chlorine into the well
d) allow the well to breathe
, e) determine the water level - ANSWER-e) determine the water level
The drawdown of a well is determined by:
a) a properly installed air line
b) the difference between the static and pumping level
c) a psi gage calibrated in feet of water
d) a tape measure
e) an electronic sounder - ANSWER-b) the difference between the static and
pumping level
T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes. - ANSWER-True
Water covers approximately ________ of Earth's surface. - ANSWER-71%
Drought is an extended period when a region receives a deficiency in its ________
water supply. - ANSWER-atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking - ANSWER-True
Excluding outside water use, the average household uses about _______ gallons of
water per month for inside use - ANSWER-2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. -
ANSWER-False (only 1%)
EXAM TCEQ AND CLASS B WITH 250
QUESTIONS AND VERIFIED CORRECT
ANSWERS | ALREADY GRADED A+ |
GUARANTEED PASS | CLASS B AND D TCEQ
WATER OPERATOR LICENSE LATEST 2025
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 - 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 - ANSWER-a) turbidity
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 - ANSWER-d) 2.3
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
d) follow-up sampling must take place
e) all of the above - ANSWER-e) all of the above
Which of the following is an acceptable level of residual chlorine in the far reaches
of a distribution system?
a) 0.2 mg/L of free chlorine for a small GWS
b) 0.5 mg/L of chloramine for a large SWS
c) 1.0 mg/L of combined when using ammoniation facilities
d) 1.0 mg/L of total for a large SWS
e) all of the above - ANSWER-e) all of the above
The purpose of an air line on a well is to:
a) aerate the well
b) determine the depth of the aquifer
c) inject chlorine into the well
d) allow the well to breathe
, e) determine the water level - ANSWER-e) determine the water level
The drawdown of a well is determined by:
a) a properly installed air line
b) the difference between the static and pumping level
c) a psi gage calibrated in feet of water
d) a tape measure
e) an electronic sounder - ANSWER-b) the difference between the static and
pumping level
T/F: In Texas, about 75% of all water is used for commercial, industrial, or
agricultural purposes. - ANSWER-True
Water covers approximately ________ of Earth's surface. - ANSWER-71%
Drought is an extended period when a region receives a deficiency in its ________
water supply. - ANSWER-atmospheric, ground, or surface
T/F: Only about 1 gallon of tap water per person/day is used for drinking and
cooking - ANSWER-True
Excluding outside water use, the average household uses about _______ gallons of
water per month for inside use - ANSWER-2,000
T/F: Only 3% of all the fresh water on earth can be easily accessed for use. -
ANSWER-False (only 1%)
