ABYC Marine Systems Certification Exam Review Questions with complete Answers

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