Welcome back to TPO magazine's Exam Study Guide Series, which offers a pair of water/wastewater study questions with in-depth explanations of the answers. Last time, we covered a set of wastewater and drinking water treatment questions on the topics of Permit-Required Confined Spaces and Finished Water Fluoride Calculations. This time you can test your knowledge about shoring depth, and stuffing box leakage.
Wastewater Treatment Sample QuestionAccording to OSHA guidelines, at what depth is shoring absolutely required, when excavating a trench?
A. 2 feetB. 4 feetC. 5 feetD. 10 feet
Water Treatment Sample QuestionWhat is adjusted to control leakage from the stuffing box of a pump?
A. Mechanical seal glandB. Mechanical sealC. Packing glandD. Lantern
