TEXAS WASTEWATER CLASS B NEWEST ACTUAL EXAM COMPLETE 200 QESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+

1 | P a g e TEXAS WASTEWATER CLASS B NEWEST 2024-2025 ACTUAL EXAM COMPLETE 200 QESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+ Organic loading of a stabilization pond is about ____ pounds of BOD/acre/day with a detention time of at least ___ days. - ANSWER- 35 BOD/ 30 Days Anaerobic digesters are covered to keep out ____, and to trap useful methane which can be used to keep the digester warm. - ANSWER- free oxygen Unstable anareobic sludge contains streaks of _________ or ________. - ANSWER- gray/green Aerobic digestion is an ____process whereby the aerobic bacteria consume themselves - ANSWER- Endogenous Approved disposal methods for digested, dewatered, sludge's are landfill, ____ and ____. - ANSWER- Incineration & Land Application 2 | P a g e Landfill applied sludge must have a solids content of at least _________percent - ANSWER- 20 Calcium Hypochlorite (HTH) is a strong _______ and reacts violently with _________. - ANSWER- Oxidizer/Oil & Hydrocarbons When added to water chlorine forms _____&_______acid - ANSWER- Hydrochlorous and Hydrochloric When ammonia is present in wastewater and reacts with chlorine_________are formed - ANSWER- Chloramines Effluent dosage of chlorine in the contact chamber must produce a total combined residual of - ANSWER- 1.0 mg/L after 20 minutes Besides disinfection, chlorine has other uses at the wastewater treatment plant such as - ANSWER- Reduces BOD, Odor, Algae growth, Helps with Grease TCEQ allows the reuse of wastewater, some of these include - ANSWER- Irrigation, aquifer recharge, cooling towers and fire protection 3 | P a g e All reclaimed water piping must be _______in color - ANSWER- purple Before entering a manhole the operator should test for ________and oxygen levels and ________the manhole before entering. - ANSWER- all hazardous gasses and ventilate When a municipal wastewater effluent has a high nitrate level and low ammonia level this most likely means - ANSWER- the effluent has received a high degree of aerobic treatment Total solids in wastewater are the sum of - ANSWER- Settleable and volatile solids This treatment device is commonly used to separate and remove large solids from raw wastewater - ANSWER- A Mechanically raked bar screen ___________would have an adverse effect on the proper settling of solids in a clarifier. - ANSWER- A short circuiting flow pattern 4 | P a g e This test would give the best information on how efficiently a trickling filter was operating - ANSWER- Percent BOD Removal This trickling filter problem could be reduced by increasing the recirculation ratio - ANSWER- Filter files What gases are produced by the controlled anaerobic digestion of wastewater sludge's - ANSWER- Methane & Carbon Dioxide These diseases are caused by pathogenic organisms that may be present in raw wastewater - ANSWER- Hepatitis, typhoid, paratyphoid, dysentery, cholera, gastroenteritis, polio, hookworm and giardiasis During heavy rain it is possible that manholes and lift stations may overflow, discharge waste materials into roadways or ditches. This type of discharge (SSO) would be - ANSWERconsidered an unavoidable discharge, a violation of the Texas Water Code, a bypass that must be reported within 24 hours and considered a health hazard An effective way for the collection system worker to prevent infection by waterborn pathogenic organism is to - ANSWER