ABYC SYSTEMS ACTUAL EXAMS PAPER QUESTIONS
AND ANSWERS SURE A+
✔✔True (Chain is not sufficient) - ✔✔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 - ✔✔What type of flexible fuel fill hose is allowable
inside engine compartments?
✔✔True - ✔✔T or F: Fuel tank vents must include a flame arrester.
✔✔USCG Type A1-15 - ✔✔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 - ✔✔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. -
✔✔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) - ✔✔How far away (max) can
electric fuel pumps be located from the engine?
,✔✔Min = 1 PSI, Max = 80% of tank's rated test pressure - ✔✔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. - ✔✔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. - ✔✔What must
be installed if the length of fuel distribution line from tank outlet to engine inlet is greater
than 12 ft?
✔✔True - ✔✔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. - ✔✔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) - ✔✔What standard is to be used for
threaded connections into a gasoline fuel tank?
✔✔500 - 600 microns - ✔✔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. - ✔✔What precaution must be undertaken when installing a brass fitting into
an aluminum fuel tank?
✔✔True - ✔✔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 - ✔✔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. - ✔✔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. - ✔✔Diesel tank inspection openings
shall be what size (minimum) and located where?
, ✔✔False - ✔✔T or F: It is allowable for a fuel tank to be in contact with bilge water so
long as it is constructed of a corrosion resistant material (i.e., plastic)
✔✔To redice risk of crevice corrosion - ✔✔Why must fuel tank installation brackets
used on metallic fuel tanks be welded or attached with a impermeable, non-hydroscopic
adhesive?
✔✔True - ✔✔True of False: metallic fuel tanks shall be galvanized on the inside and
outside for gasoline, but only on the outside for diesel.
✔✔Mild Steel - ✔✔Which of the following materials is least desireable for permanent
fuel storage: Mild Steel, Cross-linked Polyethylene, 5000-series Alluminum, Fiberglass
Composite
✔✔Polyethylene - ✔✔For sanitation storage: which material is the most desireable:
Aluminum, Mild-Steel, Galvonized Steel, Polyethylene
✔✔Stainless & Aluminum - ✔✔In a 5000 series aluminum fuel tank, which of the
following materials would be most appropriate for direct contact? Brass & Bronze,
Copper & Plastic, Stainless and Aluminum, Fiberglass Composites
✔✔Cross-Linked Polyethylene - ✔✔Which of the following fuel tank materials are
subject to expansion when exposed to hydrocarbons: Cross-Linked Polyethylene,
Aluminum, Stainless Steel, Fiberglass Composites.
✔✔Diaphragm - ✔✔Which of the following pump types can be safely run dry without risk
of damage: Centrifugal, Flexible Impeller, Vane, Diaphragm
✔✔At least 100 PPM - ✔✔What concentration of chlorine should be used for
disinfecting a contaminated potable water system?
✔✔5% - ✔✔In a portable fuel tank, what percentage air expansion is required?
✔✔12 Gallons - ✔✔According to ABYC, what is the maximum capacity of a "portable"
fuel tank?
✔✔35 degrees during use, 20 degrees while in any orientation for storage. - ✔✔A
portable fuel tank must have a base / height ratio such that it won't upset if tilted to how
many degrees?
✔✔0 °F - 140 °F - ✔✔What range of temperatures must all materials used in a portable
gas tank be capable of withstanding?
AND ANSWERS SURE A+
✔✔True (Chain is not sufficient) - ✔✔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 - ✔✔What type of flexible fuel fill hose is allowable
inside engine compartments?
✔✔True - ✔✔T or F: Fuel tank vents must include a flame arrester.
✔✔USCG Type A1-15 - ✔✔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 - ✔✔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. -
✔✔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) - ✔✔How far away (max) can
electric fuel pumps be located from the engine?
,✔✔Min = 1 PSI, Max = 80% of tank's rated test pressure - ✔✔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. - ✔✔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. - ✔✔What must
be installed if the length of fuel distribution line from tank outlet to engine inlet is greater
than 12 ft?
✔✔True - ✔✔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. - ✔✔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) - ✔✔What standard is to be used for
threaded connections into a gasoline fuel tank?
✔✔500 - 600 microns - ✔✔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. - ✔✔What precaution must be undertaken when installing a brass fitting into
an aluminum fuel tank?
✔✔True - ✔✔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 - ✔✔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. - ✔✔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. - ✔✔Diesel tank inspection openings
shall be what size (minimum) and located where?
, ✔✔False - ✔✔T or F: It is allowable for a fuel tank to be in contact with bilge water so
long as it is constructed of a corrosion resistant material (i.e., plastic)
✔✔To redice risk of crevice corrosion - ✔✔Why must fuel tank installation brackets
used on metallic fuel tanks be welded or attached with a impermeable, non-hydroscopic
adhesive?
✔✔True - ✔✔True of False: metallic fuel tanks shall be galvanized on the inside and
outside for gasoline, but only on the outside for diesel.
✔✔Mild Steel - ✔✔Which of the following materials is least desireable for permanent
fuel storage: Mild Steel, Cross-linked Polyethylene, 5000-series Alluminum, Fiberglass
Composite
✔✔Polyethylene - ✔✔For sanitation storage: which material is the most desireable:
Aluminum, Mild-Steel, Galvonized Steel, Polyethylene
✔✔Stainless & Aluminum - ✔✔In a 5000 series aluminum fuel tank, which of the
following materials would be most appropriate for direct contact? Brass & Bronze,
Copper & Plastic, Stainless and Aluminum, Fiberglass Composites
✔✔Cross-Linked Polyethylene - ✔✔Which of the following fuel tank materials are
subject to expansion when exposed to hydrocarbons: Cross-Linked Polyethylene,
Aluminum, Stainless Steel, Fiberglass Composites.
✔✔Diaphragm - ✔✔Which of the following pump types can be safely run dry without risk
of damage: Centrifugal, Flexible Impeller, Vane, Diaphragm
✔✔At least 100 PPM - ✔✔What concentration of chlorine should be used for
disinfecting a contaminated potable water system?
✔✔5% - ✔✔In a portable fuel tank, what percentage air expansion is required?
✔✔12 Gallons - ✔✔According to ABYC, what is the maximum capacity of a "portable"
fuel tank?
✔✔35 degrees during use, 20 degrees while in any orientation for storage. - ✔✔A
portable fuel tank must have a base / height ratio such that it won't upset if tilted to how
many degrees?
✔✔0 °F - 140 °F - ✔✔What range of temperatures must all materials used in a portable
gas tank be capable of withstanding?
