TCEQ Class D Water Operator License
Questions And Answers 100% Verified.
Rule of capture - correct answer. Permits 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 - correct
answer. all of the above
a public water system is responsible for providing - correct answer. all 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 - correct answer. combined
chlorine
Which of the following is a required step in collecting a routine distribution sample of
microbiological analysis - correct answer. use a sterilized bottles containing sodium
thiosulfate
The purpose of an airline on a well is - correct answer.
which minerals cause water hardness - correct answer. calcium 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 - correct answer. 25 mg/L
A disease which may be spread by inadequately disinfected water is - correct answer.
Hepatitis A
,A physical connection between a potable water supply and non-potable water source is
- correct answer. cross connection
underground geological water bearing formations that are used for public water supplies
are called - correct answer. aquifers
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. turbidity
Activated carbon is used at a surface water treatment plant primarily for - correct
answer. taste and odor control
Which of the following is part of a hyperchlorination system - correct answer.
A common chemical used for disinfecting a small public water supply is - correct
answer.
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. 79270
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. 2.3
which of the following chemicals is commonly used as a coagulant in surface water
treatment - correct answer. aluminum 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 - correct answer. the 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 - correct answer. 21 ppd
which of the following is a characteristic of gas chlorine - correct answer. pungent,
biting odor
which of the following is an acceptable level of residual chlorine in the far reaches of a
distribution system - correct answer.
disinfection means - correct answer. the destroying of pathogenic organisms
the mesh size is an important feature of a well screen because properly sized opening
should - correct answer. reduced 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 - correct answer.
flow measuring devices
the amount of chlorine in mg/L is used up by reactions with organics and inorganics is
called - correct answer. demand
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. - correct answer. 3,24
Safe Drinking water act in what year - correct answer. 1974
in 1978, TDH assumed primacy over the Safe Drinking water act from the EPA - correct
answer. True
Only about 1 gallon of tap water per person/day is used for drinking and cooking -
correct answer. T
In TX agricultural water demand accounts for about % of total water used - correct
answer. 57
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 - correct answer.
25/60
Class D License - correct answer. -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 - correct answer. -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 - correct answer. -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 - correct answer. Valid 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 - correct answer. Class B
I serve a community with 400 connections. What license levels could I have - correct
answer. Class A B C
I am not allowed to modify the treatment processes at a surface water treatment plant.
What license do I have - correct answer. Class 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 - correct answer. Class C
Public Municipal Systems - correct answer. Located in cities and towns are governed
by elected officials
Rural Water Supply Corporation - correct answer. Non-profit, non-taxing, customer
owned and operated through an elected board
River Authorities - correct answer. Created by state legislature to monitor and control
a specific river, may also have special authority such as hydroelectric power generation
Municipal utility districts - correct answer. Unincorporated community, governed by an
elected board that hires its own operators for utilities
Groundwater conservation district - correct answer. created by the legislature to
monitor and conserve a specific aquifer supply
Questions And Answers 100% Verified.
Rule of capture - correct answer. Permits 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 - correct
answer. all of the above
a public water system is responsible for providing - correct answer. all 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 - correct answer. combined
chlorine
Which of the following is a required step in collecting a routine distribution sample of
microbiological analysis - correct answer. use a sterilized bottles containing sodium
thiosulfate
The purpose of an airline on a well is - correct answer.
which minerals cause water hardness - correct answer. calcium 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 - correct answer. 25 mg/L
A disease which may be spread by inadequately disinfected water is - correct answer.
Hepatitis A
,A physical connection between a potable water supply and non-potable water source is
- correct answer. cross connection
underground geological water bearing formations that are used for public water supplies
are called - correct answer. aquifers
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. turbidity
Activated carbon is used at a surface water treatment plant primarily for - correct
answer. taste and odor control
Which of the following is part of a hyperchlorination system - correct answer.
A common chemical used for disinfecting a small public water supply is - correct
answer.
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. 79270
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. 2.3
which of the following chemicals is commonly used as a coagulant in surface water
treatment - correct answer. aluminum 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 - correct answer. the 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 - correct answer. 21 ppd
which of the following is a characteristic of gas chlorine - correct answer. pungent,
biting odor
which of the following is an acceptable level of residual chlorine in the far reaches of a
distribution system - correct answer.
disinfection means - correct answer. the destroying of pathogenic organisms
the mesh size is an important feature of a well screen because properly sized opening
should - correct answer. reduced 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 - correct answer.
flow measuring devices
the amount of chlorine in mg/L is used up by reactions with organics and inorganics is
called - correct answer. demand
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. - correct answer. 3,24
Safe Drinking water act in what year - correct answer. 1974
in 1978, TDH assumed primacy over the Safe Drinking water act from the EPA - correct
answer. True
Only about 1 gallon of tap water per person/day is used for drinking and cooking -
correct answer. T
In TX agricultural water demand accounts for about % of total water used - correct
answer. 57
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 - correct answer.
25/60
Class D License - correct answer. -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 - correct answer. -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 - correct answer. -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 - correct answer. Valid 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 - correct answer. Class B
I serve a community with 400 connections. What license levels could I have - correct
answer. Class A B C
I am not allowed to modify the treatment processes at a surface water treatment plant.
What license do I have - correct answer. Class 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 - correct answer. Class C
Public Municipal Systems - correct answer. Located in cities and towns are governed
by elected officials
Rural Water Supply Corporation - correct answer. Non-profit, non-taxing, customer
owned and operated through an elected board
River Authorities - correct answer. Created by state legislature to monitor and control
a specific river, may also have special authority such as hydroelectric power generation
Municipal utility districts - correct answer. Unincorporated community, governed by an
elected board that hires its own operators for utilities
Groundwater conservation district - correct answer. created by the legislature to
monitor and conserve a specific aquifer supply
