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TCEQ Class A prep Part 1 Exam Questions and Answers.
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TCEQ Class A prep Part 1 Exam Questions andAnswers
In Texas, water operator licensing is administer by the? - Correct Answer - TCEQ
Which minerals cause hardness in water - Correct Answer - magnesium and calciumT
the most importan federal law impacting the water utility industry is - Correct Answer - Safe Drinking
Water Act
The four water quality standards established for drinking water in the Safe Drinking Water Act are
chemical, bacteriological,radiological and - Correct Answer - chemical, bacteriological,radiological and
physical.
The minimue allowable pressure in the distribution system under emergency conditions is - Correct
Answer - 20 psi
Water vapor given off by plants and trees is know as - Correct Answer - tranpiration
organic matter includes - Correct Answer - wood,dogs,algae,bacteria
The single most important water treatment process is - Correct Answer - disinfection
excessive nitrates in drinking water can cause what syndrom in infants - Correct Answer - blue baby
A sanitary control easement must cover land within how many feet of a public water well - Correct
Answer - 150 feet
A sample for physical and chemical analysis of a new well must be taken after how many hours of
continuous pumping - Correct Answer - 36 hours
Chapter 290 Rules and Regulations requries chemical analysis of water supplies every - Correct Answer -
year
Detention time in sedimetation basins must be at least how many hours to allow floc to settle - Correct
Answer - six
backwashing should expand the filter media by - Correct Answer - 30 to 50 percent
In Texas, all public water systems are required to have what facilities - Correct Answer - chlorination
, The MCL for Trihalomethanes in drinking water is - Correct Answer - 0.080 mg/l
At room temperatures chlorine gas is - Correct Answer - greenish-yellow , has pungent odor, and is 2.5
heaver then air
Disease that may be spread by inadequately disinfected water are - Correct Answer - typhoid, cholera,
infectious hepatitis, legionnaires disease.
minimum chlorine residuals of free and toral in the far reaches of the distribution system is - Correct
Answer - .2/.5
Parameters that effect coagulation are - Correct Answer - Turbidity, PH and Alkalinity
coagulant and dosage.
Do not work in a trench ________ feet or deeper unless it is protected from cave-in - Correct Answer - 5
feet
Place spoil banks at least ________ feet from the excavation - Correct Answer - 2
dose new water mains with a minimum of ----mg/l or more chlorine for at least how many hours -
Correct Answer - 100mg/l-3hours or 25mg/l -24 hours
one bacteriological sample is required for each ------ of new completed main - Correct Answer - 1000
feet of line
A cross connection is a physical connection between a public water supply and ? - Correct Answer - 1)
another supply of unknown or questionable quality 2) any source that may contain contamination and 3)
any water that is treated to a lesser degree.
maximum spacing between ladders in a trench is - Correct Answer - 50 feet
when should a rapid sand filter be backwashed? - Correct Answer - when its dirty, when water will no
longer pass through the filter, loss of head of 6 to 10 feet, turbidity reading higher than 0.5 NTU
a ditch 4 feet wide , 6 feet deep and 1000 feet long will ve excavated . how many cubic yards of pipe
bedding will be needed to to bed the trech 7 inches deep. - Correct Answer - This is a volume question.
so you would multiplied 4 feet by 1000 feet and convert this 7 inches to percent them multiplied that to
get your leanth times with times height . that gives you the cubic feet so you need to devide by 27 to get
the cubic yards 85.9 yd3
how many gallons will 5000 feet of 18 inch water pipe hold ? - Correct Answer - this is volume question
so find the volume of a cylinder. convert 18 to feet first then 3.14x r squared x 7.48 (1 cubic foot of
water) so this one will look like 3.14x.75x.75.5000x7.48=66057.75 gallons ( round up)
A tank that has a capacity of 700,000 gallons must be disinfected with a dosaged of 50 mg/l of chlorine.
how much 65% HTH will it take to achive the same goal - Correct Answer - mgdx8.34.50 is your normal
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