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A Prep tceq with Questions & Answers
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A Prep tceq with Questions & Answers
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A Prep tceq with Questions & AnswersNew Surface water reservoirs in Texas? - (correct answer) -declines in certain areas.
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Sequestering manganese question? - (correct answer) -Does not allow manganese to combine with
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oxygen.
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Lead % in pipe and solder and flux? - (correct answer) -Max lead is 0.25%, lead and solder flux 0.2%
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Action level for Lead? - (correct answer) -Lead action level is .015%
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How do you know you have a TTHM MCL violation? - (correct answer) -Locational running average of all
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samples exceeds TTHM maximum contaminant level is .080.
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NOTE: Pick the one that says LOCATIONAL and 0.080
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TTHM averages 0.060, 0.080, 0.080 and 0.090. Add together and multiply time x4. What has occurred?
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- (correct answer) -The avg. does not exceed 0.080 so this is not a MCL violation. This is an operational
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level violation and an operational assessment will need to be performed.
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Groundwater system has 2 pressure planes with 100 connections each. How many pumps, and the GPM
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is required? - (correct answer) -Must have 2 or more pumps per pressure plane or pump station @
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0.2gpm total capacity.
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4 pumps, 200gpm
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What is a bolson aquifer? - (correct answer) -Deep filled valley deposits
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A Chloraminated system is purchased with 1mg/l total chlorine and 0.1mg/l free ammonia. What
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booster dosage do you have to apply to reach a 2.5mg/l total residual? - (correct answer) -The ratio is
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5 parts chlorine to 1 part ammonia. My math came out to answer A but you may double check.
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A. 0.2mg/L ammonia first, then 1.5mg/l chlorine
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What happens when excess chlorine is added? - (correct answer) -The total residual becomes unstable
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If groundwater with 1mg/L of free chlorine is blended with surface water with 1mg/L monochloramine
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and 05mg/L free ammonia, what happens? - (correct answer) -Free ammonia will mix with free chlorine
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and create dicholramine that can cause taste and odor issues.
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When to backwash a pressure filter? - (correct answer) -When it reaches 10psi of head loss
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Who controls groundwater in the state of Texas? - (correct answer) -Groundwater is private property
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Hypoliminion aeration does what? - (correct answer) -Adds oxygen to the bottom layer
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When total hardness equals total alkalinity? - (correct answer) -The hardness is all carbonate
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Permanent hardness question? - (correct answer) -Permanent hardness cannot be removed with the
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use of chemicals
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, A 20' diameter tank, 19ft deep. Flow is .013MGD. How many hours will it take to fill the tank 2 times? -
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(correct answer) -3.14x10x10x19 =5966
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5966x7.48(1 cubic foot of water)= 44,625.68 gallons yi yi yi yi yi yi
.013x1440 to get gallons per min =18.72 gallons per min yi yi yi yi yi yi yi yi yi
44,625.68/18.72=2383.8 min=39.7 hours yi yi
What do you need to determine a chlorine dosage? - (correct answer) -Amount of chemical and volume
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of water to be treated
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65' x 20' x 12' sedimentation basin. Flow is 1,600,000 gallons per day. What is detention time? -
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(correct answer) -1.8 hours
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convert 1,600,000 gpd to gph 1,600, = 66,667 gph yi yi yi yi yi yi yi yi yi yi
dention time = voulme of tank in gallons / flow rate yi yi yi yi yi yi yi yi yi yi yi
65x20x12x7.,667= 1.8 hours yi yi yi yi
Mud ball percent volume math. 695 ml total sample. Water begins at 500ml and rises to 545ml. What is
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the percent volume? - (correct answer) -542ml-500ml = 42ml difference; 42ml/695ml x 100 = 6%
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Maximum gpm for granular filter media? - (correct answer) -2gpm/ft yi yi yi yi yi yi yi yi yi
Well has 150' airline. Pressure gauge reads 43psi when off and 30psi when pumping. What is the
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drawdown? - (correct answer) -Drawdown = static level - pumping level; 43psi x 2.31 = 99, 30 x 2.31
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= 69. 99-69 = 30' of drawdown
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Well pumps 250 gpm for 24 hours. The question gives a static psi reading and a pumping psi reading.
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Find the specific capacity of the well? - (correct answer) -Do the math to find the drawdown first (psi x
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2.31) then (static level - pumping level). Then, pumping rate (gpm)/drawdown = Specific Capacity.
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Hydrostatic leakage question? - (correct answer) -The answer is 1.5 times the working pressure for 2
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hours
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These are all acute violations EXCEPT? - (correct answer) -A positive total coliform sample is the answer
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as it is not a MCL violation.
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What is a membrane filter used for in a water lab? - (correct answer) -Coliform organisms
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What is true color? - (correct answer) -Dissolved organic substances that cannot be removed with
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filtration
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Disinfection by product of chlorine dioxide? - (correct answer) -Chlorite yi yi yi yi yi yi yi yi yi
Can you divert surface water from one drainage basin to another? - (correct answer) -Not without a
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TCEQ permit as all surface water is owned by the state.
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Representative sampling sites for disinfection residuals include? - (correct answer) -Compliance sites, yi yi yi yi yi yi yi yi yi yi yi
high age water areas, all pressure planes, tanks and booster pumps.
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NOTE: The key is find the one that list high age water areas
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Lakes/reservoirs with high biological growth? - (correct answer) -Eutrophic yi yi yi yi yi yi yi yi
When can public notification be rescinded for filter turbidity MCL violation? - (correct answer) -Filter
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turbidity consistently below 1.0 NTU,
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distribution system flushed, yi yi
disinfectant residual above minimum,
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coliform samples negative
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