Water Distribution FINALE Study Guide (2022/2023) Rated A+

Water Distribution FINALE Study Guide (2022/2023) Rated A+ Water is most dense at A. 212 DegF B. Boiling C. Freezing D. 4 DegC D The three types of main valves on dry-barrel hydrants are A. Standard compression, non-standard, and toggle B. Standard compression, Corey, and wave action C. Standard compression, Corey, and Toggle D. Standard compression, slide gate, and Toggle D A double-check-valve backflow preventer is designed similarly to a a reduced-pressure-zone backflow preventer (RPZBP) except, A. There isn't a check between the two relief valves B. It doesn't have a bypass between the two check valves C. It doesn't have a relief valve between the two check valves D. It doesn't have an anti-siphon vacuum breaker valve C According to the Insurance Services Office (ISO, water mains that are smaller than ______ inches should not have fire hydrants connected to them. A. 12 B. 10 C. 8 D. 6 D The word "acute" refers to A. A new Italian baby B. A level of contamination that is short-lived C. A chronic condition D. High levels of contamination that are long-lived B Hydrants should not be located next to building because A. It is hard to paint B. Building stucco or exterior may become wet C. The vibration of the hydrant could cause structural damage D. Fire fighters fear the building could collapse on their truck D A disadvantage of the older-style dry barrel hydrant was that if it were broken due to a vehicular crash, the operator would have to A. Call his supervisor B. Take a vacation C. Dig down to the foot piece to replace the barrel D. Hunt for the pieces under the vehicle then replace it after reworking C The velocity limit for water flows in normal operations ________ feet per second (fps). A. 2 B. 5 C. 8 D. 11 B An equally divided portion of a sample is A. An aliquot B. An argonaut C. An antiseptic D. Grab sample A The Hazen-Williams formula use to be used to analyze flow in a distribution system. This analysis is now best performed using a computer model operated by specialized consulting firms. The Hazen-Williams formula (C-factor) indicates the _______________ of the inside surfaces of a pipe. A. Roughness B. Smoothness C. Direct corrosion level D. Amount of breaks B A high level of __________ in the water can cause the "blue baby" syndrome. A. Phosphorous B. Sulfate C. Nitrates D. Oxygen C Which of the following authors states that chlorine, alone, has been responsible for an increase in human longevity up to 80 years? A. Isaac Asimov B. Mark Twain C. George C White D. Wile E Coyote C Polyvinyl chloride (PVC) pipe should never be exposed to sunlight for long periods of time because A. It is susceptible to tuberculation caused by photovoltaic currents B. Inadequate relative humidity will cause it to crack C. Ultraviolet radiation will cause it to deteriorate D. Vitamin D formation in the pipe walls will eventually leach into the water supply C A connection from the municipal water supply directly to the packing gland on a centrifugal pump A. Is a hazard to the safety of the potable water system B. Is necessary to dilute the wastewater C. Is undesirable because too much water is required D. Reduces