ABYC Systems Certification Exam Review Polyethylene

Polyethylene - ANSWER What is the most often used materials for potable water systems? 1. Copper Alloys (incl. bronze, brass and nickel-copper) 2. AISI Type 300 series stainless steel 3. Glass-lined metal 4. FDA approved plastic 5. FDA approved rubber - ANSWER Name 5 materials allowable for contact use in potable water systems: Siphon Break - ANSWER What device can be used to separate potable water from other water systems? Accumulator Tank, after pump/filter and before check-valve - ANSWER What is the device used to maintain a stable pressure and minimize pump cycling, and where should it be located? 175% - ANSWER At what what percentage of nominal working pressure shall the relief valve be set? No, typically these are too high (up to 400% of nominal pressure) - ANSWER Is a standard household type relief valve acceptable for hot water tanks? nominal working pressure, not to exceed 80 PSI - ANSWER For the pressure reducing valve and check valve installed after a shore water connection, what is the maximum allowable pressure? overboard - ANSWER Where shall the storage tank be vented? 3 PSI or mnfg's maximum, which ever is greater. - ANSWER What is the maximum allowable pressure to which the storage tank and vent system be subjected? -40 °F to +140 °F - ANSWER What temperate range is required for pumps to be able to tolerate exposure? 257 F - ANSWER When operating at an ambient temperature of 140 F, what is the max allowable surface temperature of a pump? True - ANSWER Potable water systems must be equipped with a drain. T or F? False - ANSWER Storage tank inlet may also serve as the tank vent. T or F? True - ANSWER Storage tank inlet caps must be retained to prevent loss. T or F? True - ANSWER Storage tanks must be equipped with a vent. T or F? True - ANSWER Storage tank vent may be used for filling purposes. T or F? At least 1.5X the pressure exerted by the distance f