ABYC Systems Certification Exam Review: ABYC Systems Certification Exam Study Guide: Updated A+ Score Solution

What provisions should be made if using rigid PVC for sewage? (Ans- Secure mounting to minimize vibration effect, use flexible hose to connect to fitting and hull. What plastic material is recommended for sewage holding tanks? (Ans- linear or cross-linked polyethylene, 1/4 inch thick or greater. Of the three major type of Fiberglass Reinforced Plastic (FRP), which one is not recommended and why? (Ans- Epoxy and Vinyl Esther are ok, but polyester resin is not because of susceptibility to osmotic blistering. A removable holding tank's vent line shall be what minimum diameter? (Ans- 5/8 inch What is the approximate weight of a gallon of sewage? (Ans- 8 lbs What safety factor shall be utilized when determining necessary restraining forces for installation of a holding tank? (Ans- 2X weight of tank and contents when fullWhat material is recommended to be used to prevent chafe between metallic tanks and tank supports, bracing, etc? (Ans- neoprene, bonded to tank surface with non-hydroscopic adhesive. Why is it recommended to use plastic fittings with plastic holding tanks? (Ans- Similar coefficient of thermal expansion - helps prevent leaks. What type of fitting shall be used for deck pump-out? (Ans- 1.5 inch, internal national pipe thread (NPT) - liquid and vapor tight. True or False: holding tank vent line shall have a constant rise from the top of the tank to the vent fitting and be as short as possible. (Ans- True Only anaerobic bacterial produce a smell. T or F? (Ans- True What is the minimal distance allowed between a holding tank vent fitting and any opening into an accommodation space? (Ans- 24 inchesA macerator pump is not a Type I, II, or III MSD. (Ans- True. Maceration does not reduce bacteria content. T or F: All macerator pumps are self-priming (Ans- False. What type of pump is used for flushing a toilet? (Ans- Diaphragm Pump Diaphragm pumps are self-priming, T or F? (Ans- True To facilitate flushing, the toilet diaphragm pump should be located below the level of the top of the holding tank. (Ans- False. Should be above top of tank to prevent back filling with sewage when tank is full. Federal regulations require that all holding tanks have a means for indicating when the tank is 3/4 full by volume. T or F? (Ans- TrueIf both a holding tank and treatment system (electrical and/or chemical) are installed, it is recommended to treat sewage before storing in the holding tank when in a no-discharge zone. T or F? (Ans- False