TCEQ Wastewater (Class D) License Prep || with Error-free Solutions.

Minimum velocity required to keep solids in suspension? correct answers 2ft/sec Minimum required velocity a inverted siphon requires? correct answers 3ft/sec Two most common pipe materials used in the collection system? correct answers Clay & PVC OSHA minimum standards for shoring, sloping, or trench boxes are? correct answers 5ft or deeper If the trench is _____ or deeper, use a portable ladder or other means of exit. correct answers 4ft or deeper The ladder most extend ____ feet above the trench and be secured. correct answers 3ft Ladders must be within ____ feet of trench workers and not more than ____ feet apart. correct answers 25ft, 50ft The excavation spoil must be at least? correct answers 2ft from the edge of the trench Which type of pump is most often used in a lift station? correct answers Centrifugal Pump What is CMOM? correct answers Capacity, management, operations, and maintenance Install water lines no closer to a water line than ____ feet correct answers 9ft Chlorine helps ______ grease, making it easy to skim correct answers Congeal The magnetic meter works by the law of ________ correct answers Induction How often do you calibrate flow measuring devices? correct answers Annually Primary clarifiers should remove _____ percent of the incoming BOD correct answers 35% Primary sludge is about ________% water and _______% solids correct answers 94-96% water, and 4-6% solids Primary clarifiers should remove ____ % of the BOD and _____% of the settleable solids correct answers 35%, 90-95% Usual blanket depth in a secondary clarifier is no more than ____ of the sidewall depth correct answers 1/4 When sludge is within _____ inches of the slot, withdraw sludge correct answers 18 inches