ABYC Systems Certification Exam Review Questions With Detailed Answers
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ABYC Systems Certification
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ABYC Systems Certification
ABYC Systems Certification Exam Review Questions With Detailed Answers
175% - Answer-At what what percentage of nominal working pressure shall the relief valve be set?
/.nominal working pressure, not to exceed 80 PSI - Answer-For the pressure reducing valve and check valve installed after a s...
ABYC Systems Certification Exam
Review Questions With Detailed
Answers
175% - Answer-At what what percentage of nominal working pressure shall the relief
valve be set?
/.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?
/.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?
/.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 from the tank bottom to the deck fill
plate or vent, but not less than 3 PSI. - Answer-What rate of static pressure must a
storage tank withstand?
/.3 PSI - Answer-What is the max pressure that a desalinator can impart to a storage
tank?
/.True - Answer-Each desalinator must be equipped with an automatic shutoff salinity
detector. T or F?
/."For Cold Water Use Only" - Answer-What marking must be on pipe or tubes that are
not capable of handling hot water?
/.125 PSI, 300 PSI - Answer-What is the test pressure for water heater tank 15 gal or
less? over 15 gal but under 120 gal?
/.175 PSI - Answer-What is the max pressure relief valve setting for hot water tanks?
/.210 F - Answer-What is the max temperature relief setting for hot water tanks?
/.125 F - Answer-What is the max allowable water output temperature for hot water
system?
,/.True - Answer-All potable water system connections shall be positioned above the
normal bilge water accumulation level. T or F?
/.True - Answer-Exposed metallic parts of a potable water system shall have provisions
for electrical bonding. T or F?
/.Improper venting - Answer-For what reason might a holding tank collapse during
pump-out?
/.Type I - Answer-What type of MSD (Marine Sanitation Device) discharges effluent with
fecal coliform bacteria count <= 1,000 (per 100 ml) and no suspended solids?
/.Type II - Answer-What type of MSD (Marine Sanitation Device) discharges effluent
with fecal coliform bacteria count <= 200 (per 100 ml) and <= 150 mg suspended solids
per liter?
/.Type III - Answer-What type of MSD (Marine Sanitation Device) is designed to hold
sewage or any waste derived from sewage?
/.Retention System - Answer-What is the name given to the complete system including
toilets, hoses, pipes, holding tanks and fittings designed to receive, retain, vent and
pump out sewage?
/.Treatment System - Answer-What is the name of the system that includes all
sanitation equipment and fittings designed to receive, treat, vent and discharge
sewage?
/.Siphon break - Answer-What is another name for a vented loop that prevents back
siphoning by breaking suction yet allowing normal flow when pressurized?
/.True - Answer-True or False: If a portable toilet is secured and fitted with a deck pump-
out fitting and vent it qualifies as a type III device.
/.Prevention of siphoning - Answer-Why must careful consideration be given to the
location and routing of inlet and discharge lines for manual flush toilets when the "shut-
off" merely bleeds air into the inlet line?
/.Whenever components are installed below the max heeled water line - to prevent back
flow into the vessel or unintentional siphoning of untreated effluent overboard. - Answer-
When and why must siphon breaks be installed in a sewage system?
/.True - Answer-A seacock may be installed instead of a siphon break to prevent
discharge and back siphoning. T or F?
, /.The handle must be lockable in the direction of the holding tank - Answer-What special
provision must be included for a sewage y-valve when the discharge seacock is not
lockable?
/.Air Gap, Vacuum Break, Double Check Valve, Dedicated Water Tank - Answer-Name
four ways to separate a fresh water flushing system from potable water system.
/.1.5 inches - Answer-What is the minimum hose ID for use on un-macerated sewage?
/.linear or cross-linked polyethylene, 1/4 inch thick or greater. - Answer-What plastic
material is recommended for sewage holding tanks?
/.Epoxy and Vinyl Esther are ok, but polyester resin is not because of susceptibility to
osmotic blistering. - Answer-Of the three major type of Fiberglass Reinforced Plastic
(FRP), which one is not recommended and why?
/.5/8 inch - Answer-A removable holding tank's vent line shall be what minimum
diameter?
/.2X weight of tank and contents when full - Answer-What safety factor shall be utilized
when determining necessary restraining forces for installation of a holding tank?
/.neoprene, bonded to tank surface with non-hydroscopic adhesive. - Answer-What
material is recommended to be used to prevent chafe between metallic tanks and tank
supports, bracing, etc?
/.Similar coefficient of thermal expansion - helps prevent leaks. - Answer-Why is it
recommended to use plastic fittings with plastic holding tanks?
/.1.5 inch, internal national pipe thread (NPT) - liquid and vapor tight. - Answer-What
type of fitting shall be used for deck pump-out?
/.True - Answer-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.
/.True - Answer-Only anaerobic bacterial produce a smell. T or F?
/.24 inches - Answer-What is the minimal distance allowed between a holding tank vent
fitting and any opening into an accommodation space?
/.True. Maceration does not reduce bacteria content. - Answer-A macerator pump is not
a Type I, II, or III MSD.
/.False. - Answer-T or F: All macerator pumps are self-priming
/.Diaphragm Pump - Answer-What type of pump is used for flushing a toilet?
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