Study Guide Answer Key

Here are the answers to the Nov. 18, 2021 edition of TPO's Exam Study Guide: Which type of blower may not be operated against a closed valve?The answer to the question is B, positive displacement blower. Blowers and pumps have similar characteristics. Positive displacement blowers, like positive displacement pumps, may never be operated against a closed valve. If so, damage will occur to the piping, valves and possibly the blowers. This is an unsafe condition that my cause bodily harm to personnel nearby. Only centrifugal or like blowers maybe operated in this manner. Understanding proper blower (or pump) characteristics and methods of operation are