ABYC Systems Certification EXAM WITH
CORRECT ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST ALREADY
GRADED A+ (2025/2026) Polyethylene - ,,,correct
answer,,,,What is the most often used materials
for potable water
Polyethylene - answer-What is the most often used materials for potable water
systems?
1. Copper Alloys (incl. bronze, brass and nickel-copper)
2. AISI Type 300 series stainless steel
3. Glass-lined metal
4. FDA approved plastic
5. FDA approved rubber - answer-Name 5 materials allowable for contact use
in potable water systems:
,Siphon Break - answer-What device can be used to separate potable water
from other water systems?
Accumulator Tank, after pump/filter and before check-valve - answer-What is
the device used to maintain a stable pressure and minimize pump cycling, and
where should it be located?
175% - answer-At what what percentage of nominal working pressure shall the
relief valve be set?
15 inches - answer-What is the minimal allowed separation between fuel tank
ventilation and fuel fill openeings and compartment ventilation openings?
True (Chain is not sufficient) - answer-T or F: The fuel fill cap shall be
permanently attached or teathered with a non-flexible connector.
USCG Type A1, A2 or A1-15 - answer-What type of flexible fuel fill hose is
allowable inside engine compartments?
True - answer-T or F: Fuel tank vents must include a flame arrester.
USCG Type A1-15 - answer-What type of flexible fuel distribution and return
line is allowed inside an engine compartment?
,If a break in the line would release < 5 oz of fuel in 2.5 minutes - answer-Under
what conditions can USCG Type B1-15 be used outside of an engine
compartment?
With flexible hose sections less than or equal to 4 inches from supported rigid
line. - answer-If rigid metallic fuel lines are secured to the hull, how must they
be connected to the engine?
12 inches (with max delivery hose length of 48 inches) - answer-How far away
(max) can electric fuel pumps be located from the engine?
Min = 1 PSI, Max = 80% of tank's rated test pressure - answer-What is the
minimum and maximum allowable pressure at which a fuel tank vent system
may permit venting of the tank?
Siphoning danger - an anti-sipon device or electric valve must be installed if
this is the case. - answer-Why is it dangerous to have a fuel tank outlet located
above the height of the fuel distribution and return lines?
An auxillary manual shut-off valve located at the engine fuel inlet. - answer-
What must be installed if the length of fuel distribution line from tank outlet to
engine inlet is greater than 12 ft?
True - answer-T or F: Gasoline fuel tanks may not be integral with hull or boat
structure, but diesel tanks may.
, Must be less than 20 gallons, cylindrical with a domed head. - answer-If a
gasoline tank is made of stainless steel, what are the ABYC requirements for
the design of such a tank?
American Standard Taper Pipe Thread (NPTF) - answer-What standard is to be
used for threaded connections into a gasoline fuel tank?
500 - 600 microns - answer-What is ther allowable range (in microns) for a fuel
strainer installed at the end of a pick-up line inside a gasoline fuel tank?
Must isolate non-galvanically compatible materials with 300 series stainless
steel bushing. - answer-What precaution must be undertaken when installing a
brass fitting into an aluminum fuel tank?
True - answer-T or F: It is permissible to use the grounded conductor from a
fuel tank sender unit as the grounding (bonding) conductor for the tank.
Gasoline = Red, Diesel = Yellow - answer-What colors should portable gasoline
and diesel fuel tanks be?
Must be equipped with a shut-off valve above and below the sight guage to
stop fuel leakage in case sight guage glass is broken. - answer-If a sight-gauge is
used on a diesel fuel tank, what provisions must accompany the guage?
4.75 inches, on the top surface of the tank. - answer-Diesel tank inspection
openings shall be what size (minimum) and located where?
CORRECT ACTUAL QUESTIONS AND CORRECTLY
WELL DEFINED ANSWERS LATEST ALREADY
GRADED A+ (2025/2026) Polyethylene - ,,,correct
answer,,,,What is the most often used materials
for potable water
Polyethylene - answer-What is the most often used materials for potable water
systems?
1. Copper Alloys (incl. bronze, brass and nickel-copper)
2. AISI Type 300 series stainless steel
3. Glass-lined metal
4. FDA approved plastic
5. FDA approved rubber - answer-Name 5 materials allowable for contact use
in potable water systems:
,Siphon Break - answer-What device can be used to separate potable water
from other water systems?
Accumulator Tank, after pump/filter and before check-valve - answer-What is
the device used to maintain a stable pressure and minimize pump cycling, and
where should it be located?
175% - answer-At what what percentage of nominal working pressure shall the
relief valve be set?
15 inches - answer-What is the minimal allowed separation between fuel tank
ventilation and fuel fill openeings and compartment ventilation openings?
True (Chain is not sufficient) - answer-T or F: The fuel fill cap shall be
permanently attached or teathered with a non-flexible connector.
USCG Type A1, A2 or A1-15 - answer-What type of flexible fuel fill hose is
allowable inside engine compartments?
True - answer-T or F: Fuel tank vents must include a flame arrester.
USCG Type A1-15 - answer-What type of flexible fuel distribution and return
line is allowed inside an engine compartment?
,If a break in the line would release < 5 oz of fuel in 2.5 minutes - answer-Under
what conditions can USCG Type B1-15 be used outside of an engine
compartment?
With flexible hose sections less than or equal to 4 inches from supported rigid
line. - answer-If rigid metallic fuel lines are secured to the hull, how must they
be connected to the engine?
12 inches (with max delivery hose length of 48 inches) - answer-How far away
(max) can electric fuel pumps be located from the engine?
Min = 1 PSI, Max = 80% of tank's rated test pressure - answer-What is the
minimum and maximum allowable pressure at which a fuel tank vent system
may permit venting of the tank?
Siphoning danger - an anti-sipon device or electric valve must be installed if
this is the case. - answer-Why is it dangerous to have a fuel tank outlet located
above the height of the fuel distribution and return lines?
An auxillary manual shut-off valve located at the engine fuel inlet. - answer-
What must be installed if the length of fuel distribution line from tank outlet to
engine inlet is greater than 12 ft?
True - answer-T or F: Gasoline fuel tanks may not be integral with hull or boat
structure, but diesel tanks may.
, Must be less than 20 gallons, cylindrical with a domed head. - answer-If a
gasoline tank is made of stainless steel, what are the ABYC requirements for
the design of such a tank?
American Standard Taper Pipe Thread (NPTF) - answer-What standard is to be
used for threaded connections into a gasoline fuel tank?
500 - 600 microns - answer-What is ther allowable range (in microns) for a fuel
strainer installed at the end of a pick-up line inside a gasoline fuel tank?
Must isolate non-galvanically compatible materials with 300 series stainless
steel bushing. - answer-What precaution must be undertaken when installing a
brass fitting into an aluminum fuel tank?
True - answer-T or F: It is permissible to use the grounded conductor from a
fuel tank sender unit as the grounding (bonding) conductor for the tank.
Gasoline = Red, Diesel = Yellow - answer-What colors should portable gasoline
and diesel fuel tanks be?
Must be equipped with a shut-off valve above and below the sight guage to
stop fuel leakage in case sight guage glass is broken. - answer-If a sight-gauge is
used on a diesel fuel tank, what provisions must accompany the guage?
4.75 inches, on the top surface of the tank. - answer-Diesel tank inspection
openings shall be what size (minimum) and located where?
