Study Guide Answer Key

Here are the answers to the Feb. 10, 2022 edition of TPO's Exam Study Guide: Which method to turn pumps on or off uses air pressure? The answer to the question is B, bubble systems. Bubble systems used to be a very common method of turning pumps on or off in lift stations. The system uses a system of switches and a small tube in the lift station. An air compressor pumps air in the tube and the pressure of the water above the tube is sensed the pressure switches. A low-pressure signal will turn the pumps off and high pressure turns