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