TCEQ Wastewater (Class D) License
Prep Questions With Verified Answers
\Q\.Minimum velocity required to keep solids in suspension? - ANSWERS✔-2ft/sec
\Q\.Minimum required velocity a inverted siphon requires? - ANSWERS✔-3ft/sec
\Q\.Two most common pipe materials used in the collection system? - ANSWERS✔-Clay & PVC
\Q\.OSHA minimum standards for shoring, sloping, or trench boxes are? - ANSWERS✔-5ft or
deeper
\Q\.If the trench is _____ or deeper, use a portable ladder or other means of exit. -
ANSWERS✔-4ft or deeper
\Q\.The ladder most extend ____ feet above the trench and be secured. - ANSWERS✔-3ft
\Q\.Ladders must be within ____ feet of trench workers and not more than ____ feet apart. -
ANSWERS✔-25ft, 50ft
\Q\.The excavation spoil must be at least? - ANSWERS✔-2ft from the edge of the trench
\Q\.Which type of pump is most often used in a lift station? - ANSWERS✔-Centrifugal Pump
Prep Questions With Verified Answers
\Q\.Minimum velocity required to keep solids in suspension? - ANSWERS✔-2ft/sec
\Q\.Minimum required velocity a inverted siphon requires? - ANSWERS✔-3ft/sec
\Q\.Two most common pipe materials used in the collection system? - ANSWERS✔-Clay & PVC
\Q\.OSHA minimum standards for shoring, sloping, or trench boxes are? - ANSWERS✔-5ft or
deeper
\Q\.If the trench is _____ or deeper, use a portable ladder or other means of exit. -
ANSWERS✔-4ft or deeper
\Q\.The ladder most extend ____ feet above the trench and be secured. - ANSWERS✔-3ft
\Q\.Ladders must be within ____ feet of trench workers and not more than ____ feet apart. -
ANSWERS✔-25ft, 50ft
\Q\.The excavation spoil must be at least? - ANSWERS✔-2ft from the edge of the trench
\Q\.Which type of pump is most often used in a lift station? - ANSWERS✔-Centrifugal Pump
