Water Distribution Exam Questions and Answers 100% Correct!

A noisy or vibrating valve may be an indication of what? - ANSWER-Cavitation The selective destruction or inactivation of pathogenic organisms is - ANSWER-Disinfection Pathogenic organisms can be removed from water, killed, or inactivated by - ANSWER-Filtration The most commonly used distribution system disinfection is - ANSWER-Free chlorine A greenish- yellow gas with a penetrating and distinctive odor, two and a half times heavier than air is - ANSWER-Chlorine A brief session to discuss aspects of a job and safety - ANSWER-Tailgate safety meeting The most common means of disinfecting drinking water used today to protect the public's health? - ANSWER-Chlorination What is the responsibility of water distribution system operators? - ANSWER-Ensure safe and pleasant drinking water is delivered to everyone's tap A valve that automatically shuts off the flow into an elevated tank when the water level in the tank reaches a predetermined level. - ANSWER-Altitude valve A pump consisting of an impeller fixed on a rotating shaft, that is enclosed in a casing, and having an inlet and a discharge connection would be called - ANSWER-Centrifugal pump What is the MAIN purpose of a water storage facility? - ANSWER-To provide sufficient supply of water to average daily demands on the water supply system When is the best time to take a storage tank out of service? - ANSWER-When consumption is lowest Gauges are commonly used on which side of a pump? - ANSWER-Discharge side