ABYC Marine Electrical Certification Exam
Review
2026_2027
UPDATES
Questions And Answers
(Solved 100% Correct)
Certified Study Resources
,Every 18 inches. How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps What type of clamps are to be used for supporting wire bundles when routed over
engines and machinery?
40 lbs (E-11 Table XV) What tensile force must a 10 Gauge crimp connector withstand for one minute?
36 inches What is the max allowed unsupported cable length for battery cables?
True T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed.
C. Unwanted open The most common electrical circuit problem in marine applications is:
A. Short circuits
B. Too much continuity
C. Unwanted open
D. Inter circuit Short
D. Heat The primary by-product of excessive electrical resistance is:
A. Increased Amperage
B. Increased Voltage
C. Reduced Ambient Temperature
D. Heat
1 HP = 746 Watts One HP = how many watts?
D. TDR (time-domain reflectometer) What is the preferred tool for tracing shorted and open circuits?
A. Ohm meter
B. Amp clamp
C. Volt meter
D. TDR (time-domain reflectometer)
0 AWG A technician is installing a cable run from the batteries to the main DC panel board
on a boat as part of a refit. The boat has a 12-volt system and the distance form the
panel to the batteries is 15 ft. The maximum current draw from the panel is
calculated at 90 amps. What guage cable should be used (minimum)?
Yellow DC grounded conductors on new boats that are also equipped with AC systems
should use what color insulated wire?
16 AWG What is the smallest guage wire allowed for unsheathed wire runs through the boat?
False. Start batteries have a greater number of thinner T or F: Compared to deep cycle (house) batteries, cranking batteries will have
plates within each cell. thicker lead plates to facilitate the higher, short-duration current draws.
Cranking Which type of battery generally recharges faster? Deep cycle or cranking?
, Wire brush and backing soda. What tool and common household staple are used to clean battery terminals?
Most of the sulfuric acid has been absorbed into the lead Why might a fully-discharged wet-cell type battery freeze?
plates, leaving mostly water in the electrolyte.
1 inch, 90 lbs or 2x the battery weight, for 1 minute in each Batteries must be secured to prevent movement of more than ______ inches in any
direction. direction when a pulling force of _____ or _____, whichever is less, is applied
through the center of gravity of the battery for how long?
True T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material What provision must be in place on any fuel line located within 12 inches of a
battery terminals?
80 F, 25 Amps, 10.5 Volts Define: Battery reserve capacity = the number of minutes that a new, fully charged
battery at ______ degrees F can be continuously discharged at ______ amps while
maintaining _____ volts (for a 12 v battery)
90 minutes According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V Define: Marine Cranking Amps = the discharge load, in amperes, that a new, fully-
charged battery at _____ degrees F can deliver for ______ seconds while
maintaining a voltage of _____ volts (for a 12 v battery).
0 degrees F, 30 seconds, 7.2V Define: Cold Cranking Amps = the discharge load, in amperes, that a new, fully-
charged battery at _____ degrees F can deliver for ______ seconds while
maintaining a voltage of _____ volts (for a 12 v battery).
8 AWG What is the largest guage wire that may be connected to a bettery with wing-nuts?
800 CCA or 100 Ahr (exceptions: electronic equipment with Per ABYC E-10, a battery switch must be installed in the positive conductor from
battery backed memories; safety equipment such as bilge each battery bank with a CCA rating greater than ____ (or greater than _____ Ah if
pumps, alarms, CO detectors, bilge blowers; battery CCA rating not available).
chargers; I'm pressed current systems.
AIC = 5000 Amps (E-11 table IV-A) What is the minimum ampere interrupting capacity (AIC) for main overcurrent
protection on a battery bank rated at 12 V, 1500 CCA?
AIC = 2X mnfg's short-circuit rating or 100X nominal Ahr What is the minimum ampere interrupting capacity (AIC) for main overcurrent
rating. protection on a battery bank rated at more than 2200 CCA or more than 500 Ahr?
False. "Readily accessible" defines entry into the engine T or F: it is ok to mount a battery switch inside an engine room, because ABYC
room in an emergency as dangerous - use a remote startes that it must be located as close to the batteries as practical.
battery switch.
Review
2026_2027
UPDATES
Questions And Answers
(Solved 100% Correct)
Certified Study Resources
,Every 18 inches. How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps What type of clamps are to be used for supporting wire bundles when routed over
engines and machinery?
40 lbs (E-11 Table XV) What tensile force must a 10 Gauge crimp connector withstand for one minute?
36 inches What is the max allowed unsupported cable length for battery cables?
True T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed.
C. Unwanted open The most common electrical circuit problem in marine applications is:
A. Short circuits
B. Too much continuity
C. Unwanted open
D. Inter circuit Short
D. Heat The primary by-product of excessive electrical resistance is:
A. Increased Amperage
B. Increased Voltage
C. Reduced Ambient Temperature
D. Heat
1 HP = 746 Watts One HP = how many watts?
D. TDR (time-domain reflectometer) What is the preferred tool for tracing shorted and open circuits?
A. Ohm meter
B. Amp clamp
C. Volt meter
D. TDR (time-domain reflectometer)
0 AWG A technician is installing a cable run from the batteries to the main DC panel board
on a boat as part of a refit. The boat has a 12-volt system and the distance form the
panel to the batteries is 15 ft. The maximum current draw from the panel is
calculated at 90 amps. What guage cable should be used (minimum)?
Yellow DC grounded conductors on new boats that are also equipped with AC systems
should use what color insulated wire?
16 AWG What is the smallest guage wire allowed for unsheathed wire runs through the boat?
False. Start batteries have a greater number of thinner T or F: Compared to deep cycle (house) batteries, cranking batteries will have
plates within each cell. thicker lead plates to facilitate the higher, short-duration current draws.
Cranking Which type of battery generally recharges faster? Deep cycle or cranking?
, Wire brush and backing soda. What tool and common household staple are used to clean battery terminals?
Most of the sulfuric acid has been absorbed into the lead Why might a fully-discharged wet-cell type battery freeze?
plates, leaving mostly water in the electrolyte.
1 inch, 90 lbs or 2x the battery weight, for 1 minute in each Batteries must be secured to prevent movement of more than ______ inches in any
direction. direction when a pulling force of _____ or _____, whichever is less, is applied
through the center of gravity of the battery for how long?
True T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material What provision must be in place on any fuel line located within 12 inches of a
battery terminals?
80 F, 25 Amps, 10.5 Volts Define: Battery reserve capacity = the number of minutes that a new, fully charged
battery at ______ degrees F can be continuously discharged at ______ amps while
maintaining _____ volts (for a 12 v battery)
90 minutes According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V Define: Marine Cranking Amps = the discharge load, in amperes, that a new, fully-
charged battery at _____ degrees F can deliver for ______ seconds while
maintaining a voltage of _____ volts (for a 12 v battery).
0 degrees F, 30 seconds, 7.2V Define: Cold Cranking Amps = the discharge load, in amperes, that a new, fully-
charged battery at _____ degrees F can deliver for ______ seconds while
maintaining a voltage of _____ volts (for a 12 v battery).
8 AWG What is the largest guage wire that may be connected to a bettery with wing-nuts?
800 CCA or 100 Ahr (exceptions: electronic equipment with Per ABYC E-10, a battery switch must be installed in the positive conductor from
battery backed memories; safety equipment such as bilge each battery bank with a CCA rating greater than ____ (or greater than _____ Ah if
pumps, alarms, CO detectors, bilge blowers; battery CCA rating not available).
chargers; I'm pressed current systems.
AIC = 5000 Amps (E-11 table IV-A) What is the minimum ampere interrupting capacity (AIC) for main overcurrent
protection on a battery bank rated at 12 V, 1500 CCA?
AIC = 2X mnfg's short-circuit rating or 100X nominal Ahr What is the minimum ampere interrupting capacity (AIC) for main overcurrent
rating. protection on a battery bank rated at more than 2200 CCA or more than 500 Ahr?
False. "Readily accessible" defines entry into the engine T or F: it is ok to mount a battery switch inside an engine room, because ABYC
room in an emergency as dangerous - use a remote startes that it must be located as close to the batteries as practical.
battery switch.
