ABYC Marine Systems Certification
UPDATED Questions and CORRECT
Answers
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
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.
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)
What is a portable toilet? - CORRECT ANSWER - A fully self-contained head. Upper
section holds water for flushing. Treated water and waste are flushed to bottom each time. May
be used for several days before pump out is needed. Not permanently installed and legal to use
on all waters.
A head located below the vessel's dynamic waterline using raw water for flushing requires a: -
CORRECT ANSWER - *Vented loop on its intake
The result of an obstructed holding tank vent during pump-out may be: - CORRECT
ANSWER - Collapsed holding tank
UPDATED Questions and CORRECT
Answers
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
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.
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)
What is a portable toilet? - CORRECT ANSWER - A fully self-contained head. Upper
section holds water for flushing. Treated water and waste are flushed to bottom each time. May
be used for several days before pump out is needed. Not permanently installed and legal to use
on all waters.
A head located below the vessel's dynamic waterline using raw water for flushing requires a: -
CORRECT ANSWER - *Vented loop on its intake
The result of an obstructed holding tank vent during pump-out may be: - CORRECT
ANSWER - Collapsed holding tank
