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TCEQ Class D Water operator license questions and answers rated A+ 2024/2025
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TCEQ Class D Water operator license questions and answers rated A+ 2024/2025
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TCEQ Class D Water operator licenseRule of capture - ANSPermits owner of a well to pump as much water as desired, even if
water is drained from beneath the land of others
when treating surface water, the process of coagulation will be affected by - ANSall of the
above
a public water system is responsible for providing - ANSall of the above
a common type of oxidant that is used at most surface water treatment plants to kill bacteria
and to prevent trihalomethane formation is - ANScombined chlorine
Which of the following is a required step in collecting a routine distribution sample of
microbiological analysis - ANSuse a sterilized bottles containing sodium thiosulfate
The purpose of an airline on a well is - ANS
which minerals cause water hardness - ANScalcium and magnesium
Before a new main is placed into service, it must be properly disinfected with a minimum
chlorine dosage of:
a) 50 mg/L
b) 30 mg/L
c) 40 mg/L
d) 75 mg/L
e) 25 mg/L - ANS25 mg/L
A disease which may be spread by inadequately disinfected water is - ANSHepatitis A
A physical connection between a potable water supply and non-potable water source is -
ANScross connection
underground geological water bearing formations that are used for public water supplies are
called - ANSaquifers
Gravity filters will remove which of the following from surface water supplies:
a) turbidity
b) taste and odors
c) nitrates
d) hardness
e) chlorides - ANSturbidity
Activated carbon is used at a surface water treatment plant primarily for - ANStaste and odor
control
,Which of the following is part of a hyperchlorination system - ANS
A common chemical used for disinfecting a small public water supply is - ANS
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 - ANS79270
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 - ANS2.3
which of the following chemicals is commonly used as a coagulant in surface water
treatment - ANSaluminum sulfate
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 - ANSthe difference between static and pumping level
you are setting your chlorinator to feed a dosage of 5.0 mg/L. If your daily water pumpage is
500,000 gallons, the gas chlorinator should be set at how many pounds per day - ANS21
ppd
which of the following is a characteristic of gas chlorine - ANSpungent, biting odor
which of the following is an acceptable level of residual chlorine in the far reaches of a
distribution system - ANS
disinfection means - ANSthe destroying of pathogenic organisms
the mesh size is an important feature of a well screen because properly sized opening
should - ANSreduced the amount of sand pumped from the well
according to states rules, all public water supply wells must be provided with concrete
sealing slabs, screened casing vents, raw water sampling taps and - ANSflow measuring
devices
,the amount of chlorine in mg/L is used up by reactions with organics and inorganics is called
- ANSdemand
A water system collecting more than one bacteriological sample each month that has one
positive sample result for coliform must collect ____ repeat samples within ____ hours of
being notified of the positive result. - ANS3,24
Safe Drinking water act in what year - ANS1974
in 1978, TDH assumed primacy over the Safe Drinking water act from the EPA - ANSTrue
Only about 1 gallon of tap water per person/day is used for drinking and cooking - ANST
In TX agricultural water demand accounts for about % of total water used - ANS57
to be classified as a public system , the system must have at least 15 service connections or
serve at least individuals at least days out of the year - ANS25/60
Class D License - ANS-Valid for 3 years
-Valid at GW and purchased water systems with 250 or fewer connections
-Not allowed to adjust or modify treatment processes at a surface water treatment plant,
unless an operator who holds a Class C or higher is present
-Not Renewable for surface treatment, GUI plant operators, or systems with more than 250
connections
Class C - ANS-Valid for 3 years
-Minimum requirement for systems serving more than 250 connections
-Systems serving more than 1000 connections must employ at least 2 class c operators
-2 years experience
-60 Hrs Ground & Distribution, 64 hrs surface
Class B - ANS-Valid for 3 years
-Minimum requirement for all systems which treat surface water
-5 years experience
-100 hours Ground & Distribution, 124 hours surface
Class A - ANSValid for 3 years
8 years and 164 hours
Im the highest level operator at a surface treatment plant. What is the minimum license level
I must have - ANSClass B
I serve a community with 400 connections. What license levels could I have - ANSClass A B
C
I am not allowed to modify the treatment processes at a surface water treatment plant. What
license do I have - ANSClass D
, I have a class C license. Our service area just increased from 995 connections to 1001
connections and we are required to have another operator. What is the minimum license
level that he or she must have - ANSClass C
Public Municipal Systems - ANSLocated in cities and towns are governed by elected officials
Rural Water Supply Corporation - ANSNon-profit, non-taxing, customer owned and operated
through an elected board
River Authorities - ANSCreated by state legislature to monitor and control a specific river,
may also have special authority such as hydroelectric power generation
Municipal utility districts - ANSUnincorporated community, governed by an elected board that
hires its own operators for utilities
Groundwater conservation district - ANScreated by the legislature to monitor and conserve a
specific aquifer supply
In TX there are about public water systems - ANS6700
TCEQ defines a PWS as a system providing public water - ANSA minimum of 15 service
connections or serve at least 25 individuals at least 60 days out of the year
Community Public Water System Categories - ANSServe a minimum of either 15 residential
service connections or 25 full time residents on a year round basis
-where people live: cities, towns, rural water systems, water utility districts, and mobile home
parks
Transient noncommunity TNC - ANSA transient-noncommunity public water system serves
at least 25 persons of a transient nature at least 60 days out of the year
-Where people visit: highway rest stops, camp grounds, RV parks, motels, churches and
restaurants
Nontransient Noncommunity - ANSPWS regularly serves at least 25 of the same place who
do not live at that location at 6 months out of the year
-Where people work or go to school: factories, industries, office buildings, daycare centers
and rural schools
System must notify TCEQ - ANSBefore utility changes its source of water supply or
relocates water production
Before an existing facility is changed
Before the construction of a new facility
Files kept for 2 years include - ANSchemicals used, volume of water treated, complaint log,
dead-end line flushing, cleaning records of water storage tanks
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