ABYC Systems Certification Exam Review with complete solutions. Latest updates

What is the most often used materials for potable water systems? - Polyethylene Name 5 materials allowable for contact use in 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 What device can be used to separate potable water from other water systems? - Siphon Break What is the device used to maintain a stable pressure and minimize pump cycling, and where should it be located? - Accumulator Tank, after pump/filter and before check-valve At what what percentage of nominal working pressure shall the relief valve be set? - 175% Is a standard household type relief valve acceptable for hot water tanks? - No, typically these are too high (up to 400% of nominal pressure) For the pressure reducing valve and check valve installed after a shore water connection, what is the maximum allowable pressure? - nominal working pressure, not to exceed 80 PSI Where shall the storage tank be vented? - overboard What is the maximum allowable pressure to which the storage tank and vent system be subjected? - 3 PSI or mnfg's maximum, which ever is greater. What temperate range is required for pumps to be able to tolerate exposure? - -40 °F to +140 °F When operating at an ambient temperature of 140 F, what is the max allowable surface temperature of a pump? - 257 F Potable water systems must be equipped with a drain. T or F? - True Storage tank inlet may also serve as the tank vent. T or F? - False Storage tank inlet caps must be retained to prevent loss. T or F? - True Storage tanks must be equipped with a vent. T or F? - True Storage tank vent may be used for filling purposes. T or F? - True What rate of static pressure must a storage tank withstand? - At least 1.5X the pressure exerted by the distance from the tank bottom to the deck fill plate or vent, but not less than 3 PSI. What is the max pressure that a desalinator can impart to a storage tank? - 3 PSI Each desalinator must be equipped with an automatic shutoff salinity detector. T or F? - True What marking must be on pipe or tubes that are not capable of handling hot water? - "For Cold Water Use Only" What is the test pressure for water heater tank 15 gal or less? over 15 gal but under 120 gal? - 125 PSI, 300 PSI What is the max pressure relief valve setting for hot water tanks? - 175 PSI What is the max temperature relie