ABYC Systems Certification Exam Review Verified Exam Questions
and Answers Latest update 2026/2027
Question:
175%
Answer:
At what what percentage of nominal working pressure shall the relief valve be set?
Question:
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?
Question:
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?
Question:
True
Answer:
Storage tank inlet caps must be retained to prevent loss. T or F?
Question:
True
Answer:
Storage tanks must be equipped with a vent. T or F?
Question:
True
Answer:
Storage tank vent may be used for filling purposes. T or F?
,Question:
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?
Question:
3 PSI
Answer:
What is the max pressure that a desalinator can impart to a storage tank?
Question:
True
Answer:
Each desalinator must be equipped with an automatic shutoff salinity detector. T or F?
Question:
"For Cold Water Use Only"
Answer:
What marking must be on pipe or tubes that are not capable of handling hot water?
Question:
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?
Question:
175 PSI
Answer:
What is the max pressure relief valve setting for hot water tanks?
Question:
210 F
Answer:
What is the max temperature relief setting for hot water tanks?
,Question:
125 F
Answer:
What is the max allowable water output temperature for hot water system?
Question:
True
Answer:
All potable water system connections shall be positioned above the normal bilge water accumulation
level. T or F?
Question:
True
Answer:
Exposed metallic parts of a potable water system shall have provisions for electrical bonding. T or F?
Question:
Improper venting
Answer:
For what reason might a holding tank collapse during pump-out?
Question:
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?
Question:
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?
Question:
Type III
Answer:
What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste derived from
sewage?
, Question:
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?
Question:
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?
Question:
Siphon break
Answer:
What is another name for a vented loop that prevents back siphoning by breaking suction yet allowing
normal flow when pressurized?
Question:
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.
Question:
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?
Question:
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?
and Answers Latest update 2026/2027
Question:
175%
Answer:
At what what percentage of nominal working pressure shall the relief valve be set?
Question:
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?
Question:
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?
Question:
True
Answer:
Storage tank inlet caps must be retained to prevent loss. T or F?
Question:
True
Answer:
Storage tanks must be equipped with a vent. T or F?
Question:
True
Answer:
Storage tank vent may be used for filling purposes. T or F?
,Question:
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?
Question:
3 PSI
Answer:
What is the max pressure that a desalinator can impart to a storage tank?
Question:
True
Answer:
Each desalinator must be equipped with an automatic shutoff salinity detector. T or F?
Question:
"For Cold Water Use Only"
Answer:
What marking must be on pipe or tubes that are not capable of handling hot water?
Question:
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?
Question:
175 PSI
Answer:
What is the max pressure relief valve setting for hot water tanks?
Question:
210 F
Answer:
What is the max temperature relief setting for hot water tanks?
,Question:
125 F
Answer:
What is the max allowable water output temperature for hot water system?
Question:
True
Answer:
All potable water system connections shall be positioned above the normal bilge water accumulation
level. T or F?
Question:
True
Answer:
Exposed metallic parts of a potable water system shall have provisions for electrical bonding. T or F?
Question:
Improper venting
Answer:
For what reason might a holding tank collapse during pump-out?
Question:
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?
Question:
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?
Question:
Type III
Answer:
What type of MSD (Marine Sanitation Device) is designed to hold sewage or any waste derived from
sewage?
, Question:
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?
Question:
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?
Question:
Siphon break
Answer:
What is another name for a vented loop that prevents back siphoning by breaking suction yet allowing
normal flow when pressurized?
Question:
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.
Question:
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?
Question:
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?
