Texas Class D Water Test Exam Questions with Correct Answers.
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Course
Texas Class D Water
Institution
Texas Class D Water
Texas Class D Water Test Exam Questions with Correct Answers.Texas Class D Water Test Exam Questions with Correct Answers.Texas Class D Water Test Exam Questions with Correct Answers.
Texas Class D Water Test Exam Questions with
Correct Answers.
Who is authorized to remove a lock and tag placed on a piece of equipment to isolate it
for maintenance? - Correct Answer Only the person who placed the lock and tag
In addition of an emergency residual pressure of 20 psi, what is the minimum normal
operating pressure a public water supply system should maintain? - Correct Answer 35
psi
What is the minimum distance separating installed water mains from any sewer lines or
other possible contaminated lines? - Correct Answer 9 feet
What is the minimum distance required to separate grazing livestock and septic tanks
from a public well? - Correct Answer 50 feet
What color does the sample turn when the DPD reagent is added to water containing
chlorine? - Correct Answer Red
A system is operating at a flow rate of 2.2 MGD. A chlorine dose of 10 mg/L is required
to maintain a disinfectant residual of 0.4 mg/L. Calculate the daily chlorine demand in
pounds. - Correct Answer 176 pounds
A tank with 1 foot of water above a pressure gauge at the bottom will register a reading
of: - Correct Answer 0.433 psi
Pipe and fittings used in public water systems may not contain more than ____% lead
or solder and flux may not contain more than ____% lead. - Correct Answer 0.25%,
0.2%
Chlorine tablets (Calcium hypochlorite) should not come in contact with ________
based products due to the violent reaction that will result. - Correct Answer Petroleum
What is the condition called which affects young children and is caused by high nitrate
levels in drinking water? (Choose all that apply) - Correct Answer
How much does one gallon of water weigh? - Correct Answer 8.34 lbs.
How many hours does the system operator have to contact the state regulatory
authority by phone if a contamination event occurs in a public water system at 8:00
Monday morning and the administrative office closes at 4:00 p.m.? - Correct Answer
After disinfecting a newly installed water main, bacteriological samples are required to
be collected every ____ feet along the new line. - Correct Answer 1,000
, For water to be considered Potable, it: (choose all that apply): - Correct Answer
Contains a chlorine residual, Is free of pathogens, Coliform free
Which choice(s) below is/are sources of groundwater? (Choose all that apply) - Correct
Answer Aquifer
Which waterborne diseases below may be spread by water that has not been properly
disinfected? (Choose all that apply) - Correct Answer Typhoid, hepatic, dysentery,
crypto, cholera.
A Texas Class D Water Operator cannot renew his license if he operates a groundwater
treatment system with _____ service connections. - Correct Answer 250
What is the purpose of installing a check valve on the discharge side of a centrifugal
pump? - Correct Answer Prevent damage to the pump motor when not in operation
What reports/records are Texas Public Water Systems required to create and maintain
on-site? - Correct Answer All of the above - Storage cleaning, water volume pumped
chemicals used, dead ends flushed.
What is the minimum production capacity per service connection at peak demand
required by the TCEQ for community water systems? - Correct Answer
Where should the chlorine scrubber intake vents be located in a chlorine cylinder
storage room? - Correct Answer Near the floor since chlorine is about 2.5 time heavier
than air
What do water operators call the amount of chlorine that is used up by reacting with
iron, organics, bacteria, or other impurities? - Correct Answer Chlorine Demand
What operator action is required when a public water supply system's distribution
system drop below 20 psi? (Choose all that apply) - Correct Answer Notify the Regional
TCEQ Office, Correct the cause of the low pressure condition, Issue a "Boil Water
Notice"
Where are curb stop valves found in the distribution system? - Correct Answer On the
water system's side of a water meter
Information concerning chemicals in the workplace should be available to employees in
the form of a: - Correct Answer Material Safety Data Sheet (MSDS) or Safety Data
Sheet (SDS)
What is the minimum flushing requirement when flushing dead-end mains to make sure
proper chlorine residual and water quality is maintained? - Correct Answer Monthly
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