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:
- soda ash
- copper sulfate
- sodium hypochlorite
- fluoride
- sodium chloride - ANSWER-c) sodium hypochlorite
Gravity filters will remove which of the following from surface water supplies:
- turbidity
- taste and odors
- nitrates
- hardness
- 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? 1 / 3
- 4.2
- 2.9
- 0.3
- 2.3
- 4.7 - ANSWER-d) 2.3
When fecal coliform organisms are found in a water supply, it is an indication that:
- the water supply is contaminated
- pathogenic organisms might be present
- the water may be unsuitable for drinking
- follow-up sampling must take place
- 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?
- 0.2 mg/L of free chlorine for a small GWS
- 0.5 mg/L of chloramine for a large SWS
- 1.0 mg/L of combined when using ammoniation facilities
- 1.0 mg/L of total for a large SWS
- all of the above - ANSWER-e) all of the above
The purpose of an air line on a well is to:
- aerate the well
- determine the depth of the aquifer
- inject chlorine into the well
- allow the well to breathe 2 / 3
- determine the water level - ANSWER-e) determine the water level
The drawdown of a well is determined by:
- a properly installed air line
- the difference between the static and pumping level
- a psi gage calibrated in feet of water
- a tape measure
- 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%)
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