Class D Water Operator License Exam Tceq Questions & Answers 2024

T/F: A distribution system without dead ends is called an open system {Ans: False (looped system)}T/F: Flashing lights must be yellow and are excellent for attracting a driver's attention toward a potential hazard. {Ans: True}Excessive calcium and _____ are the primary cause of hardness in water. {Ans: Magnesium}T/F: The most common design for residential service is the positive replacement meter. {Ans: False}A full-face self-contained breathing apparatus or supplied air respirator must be readily accessible outside the fire station when chlorine gas is used. {Ans: False (A full-face self-contained breathing apparatus (SCBA) or supplied air respirator that meets OSHA standards shall be readily accessible outside the *chlorinator room* when chlorine gas is used.)}Get the sample to the lab within ___________ or it will be rejected. {Ans: 30 hours (for BacT samples)}