ABYC Marine Systems Certification Verified Exam Questions and
Answers Latest update 2026/2027
Question:
Which components may need to be by-passed for decommissioning?
Answer:
*Tanks, filters, water heaters. They can be drained and cleaned separately,
saving money on antifreeze
Question:
Which agency should be referenced when selecting materials for potable water systems?
Answer:
FDA
Question:
Biologically contaminated potable-water systems should be disinfected with a mixture of chlorine and
have a strength of at least
Answer:
100 ppm
Question:
Contamination of the potable water system with ethylene glycol may be explained by
Answer:
*Leaking heat exchanger on a water heater.
Question:
What is the ABYC standard referencing potable water?
Answer:
H-23
Question:
What component is intended to maintain a stable pressure within a potable water system and to
minimize pump cycling?
Answer:
Accumulator tank.
, Question:
List components of potable water system in order from the deck fill
Answer:
*
*
Deck fill, freshwater tank, filter/strainer, accumulator tank, check valve, *vent, water heater, faucets,
etc.
Question:
What is the desired operating pressure within a potable water system found on board boats?
Answer:
35-50 psi
Question:
What is the main job of a potable water system?
Answer:
To deliver drinking water without introducing detectable taste, odor, or color.
Question:
If the potable water system includes a water heater tank, what shall be located on the water heater?
Answer:
Pressure relief valve.
Question:
What is the first component that tends to freeze in a potable water system?
Answer:
Faucets
Question:
What is the function of a type I or II MSD
Answer:
Treat waste to reduce bacteria and visible solids, and discharge directly overboard. Type II is more
powerful.
Question:
What is the function of a type III MSD?
Answer:
Head connected directly to a holding tank which can be emptied at marinas and pump-out stations.
Answers Latest update 2026/2027
Question:
Which components may need to be by-passed for decommissioning?
Answer:
*Tanks, filters, water heaters. They can be drained and cleaned separately,
saving money on antifreeze
Question:
Which agency should be referenced when selecting materials for potable water systems?
Answer:
FDA
Question:
Biologically contaminated potable-water systems should be disinfected with a mixture of chlorine and
have a strength of at least
Answer:
100 ppm
Question:
Contamination of the potable water system with ethylene glycol may be explained by
Answer:
*Leaking heat exchanger on a water heater.
Question:
What is the ABYC standard referencing potable water?
Answer:
H-23
Question:
What component is intended to maintain a stable pressure within a potable water system and to
minimize pump cycling?
Answer:
Accumulator tank.
, Question:
List components of potable water system in order from the deck fill
Answer:
*
*
Deck fill, freshwater tank, filter/strainer, accumulator tank, check valve, *vent, water heater, faucets,
etc.
Question:
What is the desired operating pressure within a potable water system found on board boats?
Answer:
35-50 psi
Question:
What is the main job of a potable water system?
Answer:
To deliver drinking water without introducing detectable taste, odor, or color.
Question:
If the potable water system includes a water heater tank, what shall be located on the water heater?
Answer:
Pressure relief valve.
Question:
What is the first component that tends to freeze in a potable water system?
Answer:
Faucets
Question:
What is the function of a type I or II MSD
Answer:
Treat waste to reduce bacteria and visible solids, and discharge directly overboard. Type II is more
powerful.
Question:
What is the function of a type III MSD?
Answer:
Head connected directly to a holding tank which can be emptied at marinas and pump-out stations.
