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TCEQ Class A prep Part 1 with Questions & Answers
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TCEQ Class A prep Part 1 with Questions & Answers
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TCEQ Class A prep Part 1 with Questions &Answers
In Texas, water operator licensing is administer by the? - (correct answer) -TCEQ
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Which minerals cause hardness in water - (correct answer) -magnesium and calciumT
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the most importan federal law impacting the water utility industry is - (correct answer) -Safe Drinking
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Water Act
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The four water quality standards established for drinking water in the Safe Drinking Water Act are
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chemical, bacteriological,radiological and - (correct answer) -chemical, bacteriological,radiological and
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physical.
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The minimue allowable pressure in the distribution system under emergency conditions is - (correct
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answer) -20 psi
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Water vapor given off by plants and trees is know as - (correct answer) -tranpiration
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organic matter includes - (correct answer) -wood,dogs,algae,bacteria
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The single most important water treatment process is - (correct answer) -disinfection
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excessive nitrates in drinking water can cause what syndrom in infants - (correct answer) -blue baby
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A sanitary control easement must cover land within how many feet of a public water well - (correct
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answer) -150 feet
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A sample for physical and chemical analysis of a new well must be taken after how many hours of
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continuous pumping - (correct answer) -36 hours
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Chapter 290 Rules and Regulations requries chemical analysis of water supplies every - (correct
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answer) -year
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Detention time in sedimetation basins must be at least how many hours to allow floc to settle - (correct
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answer) -six
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backwashing should expand the filter media by - (correct answer) -30 to 50 percent
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In Texas, all public water systems are required to have what facilities - (correct answer) -chlorination
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The MCL for Trihalomethanes in drinking water is - (correct answer) -0.080 mg/l
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At room temperatures chlorine gas is - (correct answer) -greenish-yellow , has pungent odor, and is 2.5
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heaver then air
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Disease that may be spread by inadequately disinfected water are - (correct answer) -typhoid, cholera,
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, yi infectious hepatitis, legionnaires disease. yi yi yi
minimum chlorine residuals of free and toral in the far reaches of the distribution system is - (correct
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answer) -.2/.5
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Parameters that effect coagulation are - (correct answer) -Turbidity, PH and Alkalinity
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coagulant and dosage. yi yi
Do not work in a trench ________ feet or deeper unless it is protected from cave-in - (correct answer) -5
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feet
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Place spoil banks at least ________ feet from the excavation - (correct answer) -2
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dose new water mains with a minimum of ----mg/l or more chlorine for at least how many hours -
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(correct answer) -100mg/l-3hours or 25mg/l -24 hours
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one bacteriological sample is required for each ------ of new completed main - (correct answer) -1000
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feet of line
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A cross connection is a physical connection between a public water supply and ? - (correct answer) -1)
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another supply of unknown or questionable quality 2) any source that may contain contamination and
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3) any water that is treated to a lesser degree.
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maximum spacing between ladders in a trench is - (correct answer) -50 feet
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when should a rapid sand filter be backwashed? - (correct answer) -when its dirty, when water will no
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longer pass through the filter, loss of head of 6 to 10 feet, turbidity reading higher than 0.5 NTU
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a ditch 4 feet wide , 6 feet deep and 1000 feet long will ve excavated . how many cubic yards of pipe
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bedding will be needed to to bed the trech 7 inches deep. - (correct answer) -This is a volume
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question. so you would multiplied 4 feet by 1000 feet and convert this 7 inches to percent them
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multiplied that to get your leanth times with times height . that gives you the cubic feet so you need to
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devide by 27 to get the cubic yards 85.9 yd3
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how many gallons will 5000 feet of 18 inch water pipe hold ? - (correct answer) -this is volume question
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so find the volume of a cylinder. convert 18 to feet first then 3.14x r squared x 7.48 (1 cubic foot of
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water) so this one will look like 3.14x.75x.75.5000x7.48=66057.75 gallons ( round up)
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A tank that has a capacity of 700,000 gallons must be disinfected with a dosaged of 50 mg/l of
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chlorine. how much 65% HTH will it take to achive the same goal - (correct answer) -mgdx8.34.50 is
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your normal forumal to find lbs of chlorine. how ever we need that is for 100 % we have 65% so you
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will need to .7mgdx8.34x50mg/l /.65 =449.07
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The minimum residual water pressure required by Rules and Regulations for publics water systems (30
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TAC Chapter 290 subchapter D ) is - (correct answer) -20 psi under demand conditions
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Dead end mains should be flushed every - (correct answer) -month
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water hardness is caused by - (correct answer) -calcium and magnesium salts
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transpiration is - (correct answer) -the release of water vapor into the air by plants
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The presents of nitrates in water can cause - (correct answer) -blue babies
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The federal agency that provides standard for maximum allowable concentrations of inorganics
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chemicals in potable water is - (correct answer) -The Environmental protection Agency
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