TCEQ Class C Water License Exam – Complete Questions and
Answers Texas Commission on Environmental Quality
(TCEQ) Full Study Guide with 100% Pass Rate
Introduction:
This document provides a comprehensive collection of official-style
exam questions and verified answers for the TCEQ Class C Water
License Exam in Texas. It covers all major areas of water treatment
and distribution, including disinfection, storage, hydraulics, safety,
chlorine handling, pressure systems, and state regulatory
requirements. The material is designed to help candidates prepare
effectively for certification and ensure a full understanding of water
system operations and maintenance according to TCEQ standards.
Ideal for self-study and last-minute revision before the licensing test.
Exam Questions and Answers
94. Physical characteristics of water include?--- correct answer --
- Taste, odor, Color, turbidity, and temperature
95. Common gases found in water are hydrogen sulfide, Carbon
dioxide, and methane. Hydrogen sulfide can be identified by its
distinct smell, which is?--- correct answer --- Rotten eggs and
obnoxious
96. Ground water is generally well filtered and free of turbidity,
color, and organ- ic. However it may be high in?--- correct answer -
-- Minerals, gases, or corrosives
97. Livestock and septic tanks must be no closer than to a
public well.?--- correct answer --- 50 feet
,98. Underground fuel tanks and septic drainage fields most be at
least
feet from a public well.?--- correct answer --- 150 feet
99. Feedlots, sewage treatment plants and landfills must be at
least feet from a public well?--- correct answer --- 500
100. Trenches for laying 6 inch and larger pipe must be at least 18
inches and or
inches wider than the pipe diameter?--- correct answer --- 12
101. The top of a pipe in a trench must be at least inches from
the top of the ground?--- correct answer --- 24
102. In an excavation feet or deeper a means of exit must be
provided?--- correct answer --- 4
103. In an excavation if a ladder is used as a means of exit, it must
extend feet above the ground and be secured and within
feet laterally of anyone in the excavation.?--- correct answer -
-- 3 and 25
104. A groundwater system that serves in excess of 1,000
connections must have at least operators with license to meet
minimum State requirements for public water systems?--- correct
answer --- 2 and c
105. A groundwater well is currently pumping 1,000 gallons per mi
1,000 gpm to million gallons per day (MGD)?--- correct answer ---
1.44 MGD
106. It is desirable for pH of treated water to be above
otherwise
,conditions will exist?--- correct answer --- 7.0 and corrosive
107. Fluorides are naturally occurring in some groundwater.
Fluorides in drink- ing water should not exceed?--- correct answer -
-- 4.0 mg/L
108. Red water or red stains may be caused by levels in water?---
correct answer --- Iron
109. When chemicals are used at a water treatment plant a
day supply should be kept on hand at all times to comply with
State standards?--- correct answer --- 30
110. The presence of iron in water is most commonly treated by?---
correct answer --- Aeration
111. A common chemical oxidizer is?--- correct answer ---
Potassium permanganate
112. If groundwater is to be treated for several problems, the first
process should be?--- correct answer --- Aeration
113. Excess fluoride in water may be removed by?--- correct
answer --- Activated alumina
114. Trihalomethanes are formed by the reaction of with organic
chemi- cals?--- correct answer --- Free available Chlorine
115. TCEQ requests a water system to have disinfection equipment
capable of providing at least % greater capacity than the
highest expected dosage at any time?--- correct answer --- 50
116. The rotometer on a gas chlorinator indicates the number of of
chlorine fed during a period?--- correct answer --- Pounds/24 hours
, 117. A dosage of 4.0 mg/l is added to 750,000 gallons of water.
How of chlorine are needed??--- correct answer --- 25 pounds
118. How many pounds of 70% Chlorine (HTH) will be needed to
tre amount of water as 9.0 pounds of 100% chlorine??--- correct
answer --- 12.85 pounds
119. Using a ton cylinder, the maximum withdrawal rate should
not exceed?--- correct answer --- 400 pounds
120. The "pinging" sound or "rocks bouncing" sound coming is -
from the bump typically indicates the pump?--- correct answer ---
Cavitating
121. A submersible pump and motor will be?--- correct answer ---
Suspended by pipe, placed near the bottom of the well
122. The distance from the water level in the well to the centerline
of a pump is?--- correct answer --- Static suction head
123. The distance of the water level in the well to the Water level
in a storage tank is?--- correct answer --- Total static head
124. The loss of energy which results from the movement of water
through pipes and fittings is?--- correct answer --- Friction
125. If a water lubricated vertical turbine pump is started by dry
bearings?--- correct answer --- The bearings will be damaged
126. Routinely measuring the static level and pumping level can?---
correct answer --- Detect problems with the pump, well screen,
and/or water level
127. The recommended capacities for ground storage is based on
providing
Answers Texas Commission on Environmental Quality
(TCEQ) Full Study Guide with 100% Pass Rate
Introduction:
This document provides a comprehensive collection of official-style
exam questions and verified answers for the TCEQ Class C Water
License Exam in Texas. It covers all major areas of water treatment
and distribution, including disinfection, storage, hydraulics, safety,
chlorine handling, pressure systems, and state regulatory
requirements. The material is designed to help candidates prepare
effectively for certification and ensure a full understanding of water
system operations and maintenance according to TCEQ standards.
Ideal for self-study and last-minute revision before the licensing test.
Exam Questions and Answers
94. Physical characteristics of water include?--- correct answer --
- Taste, odor, Color, turbidity, and temperature
95. Common gases found in water are hydrogen sulfide, Carbon
dioxide, and methane. Hydrogen sulfide can be identified by its
distinct smell, which is?--- correct answer --- Rotten eggs and
obnoxious
96. Ground water is generally well filtered and free of turbidity,
color, and organ- ic. However it may be high in?--- correct answer -
-- Minerals, gases, or corrosives
97. Livestock and septic tanks must be no closer than to a
public well.?--- correct answer --- 50 feet
,98. Underground fuel tanks and septic drainage fields most be at
least
feet from a public well.?--- correct answer --- 150 feet
99. Feedlots, sewage treatment plants and landfills must be at
least feet from a public well?--- correct answer --- 500
100. Trenches for laying 6 inch and larger pipe must be at least 18
inches and or
inches wider than the pipe diameter?--- correct answer --- 12
101. The top of a pipe in a trench must be at least inches from
the top of the ground?--- correct answer --- 24
102. In an excavation feet or deeper a means of exit must be
provided?--- correct answer --- 4
103. In an excavation if a ladder is used as a means of exit, it must
extend feet above the ground and be secured and within
feet laterally of anyone in the excavation.?--- correct answer -
-- 3 and 25
104. A groundwater system that serves in excess of 1,000
connections must have at least operators with license to meet
minimum State requirements for public water systems?--- correct
answer --- 2 and c
105. A groundwater well is currently pumping 1,000 gallons per mi
1,000 gpm to million gallons per day (MGD)?--- correct answer ---
1.44 MGD
106. It is desirable for pH of treated water to be above
otherwise
,conditions will exist?--- correct answer --- 7.0 and corrosive
107. Fluorides are naturally occurring in some groundwater.
Fluorides in drink- ing water should not exceed?--- correct answer -
-- 4.0 mg/L
108. Red water or red stains may be caused by levels in water?---
correct answer --- Iron
109. When chemicals are used at a water treatment plant a
day supply should be kept on hand at all times to comply with
State standards?--- correct answer --- 30
110. The presence of iron in water is most commonly treated by?---
correct answer --- Aeration
111. A common chemical oxidizer is?--- correct answer ---
Potassium permanganate
112. If groundwater is to be treated for several problems, the first
process should be?--- correct answer --- Aeration
113. Excess fluoride in water may be removed by?--- correct
answer --- Activated alumina
114. Trihalomethanes are formed by the reaction of with organic
chemi- cals?--- correct answer --- Free available Chlorine
115. TCEQ requests a water system to have disinfection equipment
capable of providing at least % greater capacity than the
highest expected dosage at any time?--- correct answer --- 50
116. The rotometer on a gas chlorinator indicates the number of of
chlorine fed during a period?--- correct answer --- Pounds/24 hours
, 117. A dosage of 4.0 mg/l is added to 750,000 gallons of water.
How of chlorine are needed??--- correct answer --- 25 pounds
118. How many pounds of 70% Chlorine (HTH) will be needed to
tre amount of water as 9.0 pounds of 100% chlorine??--- correct
answer --- 12.85 pounds
119. Using a ton cylinder, the maximum withdrawal rate should
not exceed?--- correct answer --- 400 pounds
120. The "pinging" sound or "rocks bouncing" sound coming is -
from the bump typically indicates the pump?--- correct answer ---
Cavitating
121. A submersible pump and motor will be?--- correct answer ---
Suspended by pipe, placed near the bottom of the well
122. The distance from the water level in the well to the centerline
of a pump is?--- correct answer --- Static suction head
123. The distance of the water level in the well to the Water level
in a storage tank is?--- correct answer --- Total static head
124. The loss of energy which results from the movement of water
through pipes and fittings is?--- correct answer --- Friction
125. If a water lubricated vertical turbine pump is started by dry
bearings?--- correct answer --- The bearings will be damaged
126. Routinely measuring the static level and pumping level can?---
correct answer --- Detect problems with the pump, well screen,
and/or water level
127. The recommended capacities for ground storage is based on
providing
