ABYC Marine Systems Certification
Exam Questions & Answers (Grade
A+)
Which components may need to be by-passed for
decommissioning? -
correct answer ✅*Tanks, filters, water heaters. They can be
drained and cleaned separately, saving money on antifreeze
Which agency should be referenced when selecting materials for
potable water systems? -
correct answer ✅FDA
Biologically contaminated potable-water systems should be
disinfected with a mixture of chlorine and have a strength of at
least: -
correct answer ✅100 ppm
Contamination of the potable water system with ethylene glycol
may be explained by: -
correct answer ✅*Leaking heat exchanger on a water heater.
What is the ABYC standard referencing potable water? -
correct answer ✅H-23
,ABYC Marine Systems Certification
Exam Questions & Answers (Grade
A+)
What component is intended to maintain a stable pressure within a
potable water system and to minimize pump cycling? -
correct answer ✅Accumulator tank.
List components of potable water system in order from the deck fill
-
correct answer ✅*
*
Deck fill, freshwater tank, filter/strainer, accumulator tank, check
valve, *vent, water heater, faucets, etc.
What is the desired operating pressure within a potable water
system found on board boats? -
correct answer ✅35-50 psi
What is the main job of a potable water system? -
correct answer ✅To deliver drinking water without introducing
detectable taste, odor, or color.
, ABYC Marine Systems Certification
Exam Questions & Answers (Grade
A+)
If the potable water system includes a water heater tank, what shall
be located on the water heater? -
correct answer ✅Pressure relief valve.
What is the first component that tends to freeze in a potable water
system? -
correct answer ✅Faucets
What is the function of a type I or II MSD -
correct answer ✅Treat waste to reduce bacteria and visible solids,
and discharge directly overboard. Type II is more powerful.
What is the function of a type III MSD? -
correct answer ✅Head connected directly to a holding tank which
can be emptied at marinas and pump-out stations.
What is the function of a Y-valve in MSDs -
correct answer ✅Allow waste to be diverted and discharged
directly overboard (outside 3-mile discharge limit)
Exam Questions & Answers (Grade
A+)
Which components may need to be by-passed for
decommissioning? -
correct answer ✅*Tanks, filters, water heaters. They can be
drained and cleaned separately, saving money on antifreeze
Which agency should be referenced when selecting materials for
potable water systems? -
correct answer ✅FDA
Biologically contaminated potable-water systems should be
disinfected with a mixture of chlorine and have a strength of at
least: -
correct answer ✅100 ppm
Contamination of the potable water system with ethylene glycol
may be explained by: -
correct answer ✅*Leaking heat exchanger on a water heater.
What is the ABYC standard referencing potable water? -
correct answer ✅H-23
,ABYC Marine Systems Certification
Exam Questions & Answers (Grade
A+)
What component is intended to maintain a stable pressure within a
potable water system and to minimize pump cycling? -
correct answer ✅Accumulator tank.
List components of potable water system in order from the deck fill
-
correct answer ✅*
*
Deck fill, freshwater tank, filter/strainer, accumulator tank, check
valve, *vent, water heater, faucets, etc.
What is the desired operating pressure within a potable water
system found on board boats? -
correct answer ✅35-50 psi
What is the main job of a potable water system? -
correct answer ✅To deliver drinking water without introducing
detectable taste, odor, or color.
, ABYC Marine Systems Certification
Exam Questions & Answers (Grade
A+)
If the potable water system includes a water heater tank, what shall
be located on the water heater? -
correct answer ✅Pressure relief valve.
What is the first component that tends to freeze in a potable water
system? -
correct answer ✅Faucets
What is the function of a type I or II MSD -
correct answer ✅Treat waste to reduce bacteria and visible solids,
and discharge directly overboard. Type II is more powerful.
What is the function of a type III MSD? -
correct answer ✅Head connected directly to a holding tank which
can be emptied at marinas and pump-out stations.
What is the function of a Y-valve in MSDs -
correct answer ✅Allow waste to be diverted and discharged
directly overboard (outside 3-mile discharge limit)
