1 TCEQ SURFACE WATER B LICENSE EXAM | QUESTIONS & A NSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ When pressure testing a new line, how much pressure do you add? Correct Answer: 1.5 times normal pressure, up to 150 pounds, whichever is greater What would cause a repeat Bac -T sample? Correct Answer: Incomplete form, not enough sample, silt or slime in the bottle, positive e -coli, all of the above What are th e layers of stratification? Correct Answer: Upper layer - Epilimnion. Middle layer - Thermocline. Bottom Layer - Hypolimnion. What standard must bleach meet? Correct Answer: NSF (National Sanitation Foundation) What is the Solid contact unit? 2 Correct Answer: Also known as a Sludge blanket unit, it is an all -in-one unit, handling mixing, flocculation and sedimentation, with an upward flow. What is the number one sludge removal process in Texas? Correct Answer: Lagooning/Lagoons. What are the Log removals for cryptosporidium, giardia and viruses? Correct Answer: Cryptosporidium - Log 2, 99%. Giardia - Log 3, 99.9%. Viruses - Log 4, 99.99%. Which two filter membranes remove the most NTUs? Correct Answer: RO (Reverse Osmosis), and Nano Filtration What are lime and soda ash used for removing? Correct Answer: Hardness What purpose does aeration serve in the softening process? Correct Answer: Releases CO2 which helps keep hardness in solution. What is the Jar Test Process? Correct Answer: Unknown What can replace primary coagulation?
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