ABYC MARINE ELECTRICAL
CERTIFICATION EXAM REVIEW
2025/2026 QUESTIONS AND ANSWERS
100% PASS.
Every 18 inches. - ANS How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - ANS What type of clamps are to be used for supporting
wire bundles when routed over engines and machinery?
40 lbs (E-11 Table XV) - ANS What tensile force must a 10 Gauge crimp connector withstand
for one minute?
36 inches - ANS What is the max allowed unsupported cable length for battery cables?
True - ANS T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed.
C. Unwanted open - ANS The most common electrical circuit problem in marine applications
is:
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,A. Short circuits
B. Too much continuity
C. Unwanted open
D. Inter circuit Short
D. Heat - ANS 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 - ANS One HP = how many watts?
D. TDR (time-domain reflectometer) - ANS 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 - ANS 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 - ANS DC grounded conductors on new boats that are also equipped with AC systems
should use what color insulated wire?
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,16 AWG - ANS What is the smallest guage wire allowed for unsheathed wire runs through the
boat?
False. Start batteries have a greater number of thinner plates within each cell. - ANS T or F:
Compared to deep cycle (house) batteries, cranking batteries will have thicker lead plates to
facilitate the higher, short-duration current draws.
Cranking - ANS Which type of battery generally recharges faster? Deep cycle or cranking?
Wire brush and backing soda. - ANS What tool and common household staple are used to
clean battery terminals?
Most of the sulfuric acid has been absorbed into the lead plates, leaving mostly water in the
electrolyte. - ANS Why might a fully-discharged wet-cell type battery freeze?
1 inch, 90 lbs or 2x the battery weight, for 1 minute in each direction. - ANS Batteries must be
secured to prevent movement of more than ______ inches in any direction when a pulling force
of _____ or _____, whichever is less, is applied through the center of gravity of the battery for
how long?
True - ANS T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material - ANS 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 - ANS 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)
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 90 minutes - ANS According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V - ANS 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 - ANS 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 - ANS 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 battery backed memories; safety
equipment such as bilge pumps, alarms, CO detectors, bilge blowers; battery chargers; I'm
pressed current systems. - ANS Per ABYC E-10, a battery switch must be installed in the
positive conductor from each battery bank with a CCA rating greater than ____ (or greater than
_____ Ah if CCA rating not available).
AIC = 5000 Amps (E-11 table IV-A) - ANS 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 rating. - ANS What is the minimum
ampere interrupting capacity (AIC) for main overcurrent protection on a battery bank rated at
more than 2200 CCA or more than 500 Ahr?
False. "Readily accessible" defines entry into the engine room in an emergency as dangerous -
use a remote battery switch. - ANS T or F: it is ok to mount a battery switch inside an engine
room, because ABYC startes that it must be located as close to the batteries as practical.
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
CERTIFICATION EXAM REVIEW
2025/2026 QUESTIONS AND ANSWERS
100% PASS.
Every 18 inches. - ANS How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - ANS What type of clamps are to be used for supporting
wire bundles when routed over engines and machinery?
40 lbs (E-11 Table XV) - ANS What tensile force must a 10 Gauge crimp connector withstand
for one minute?
36 inches - ANS What is the max allowed unsupported cable length for battery cables?
True - ANS T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed.
C. Unwanted open - ANS The most common electrical circuit problem in marine applications
is:
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,A. Short circuits
B. Too much continuity
C. Unwanted open
D. Inter circuit Short
D. Heat - ANS 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 - ANS One HP = how many watts?
D. TDR (time-domain reflectometer) - ANS 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 - ANS 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 - ANS DC grounded conductors on new boats that are also equipped with AC systems
should use what color insulated wire?
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
,16 AWG - ANS What is the smallest guage wire allowed for unsheathed wire runs through the
boat?
False. Start batteries have a greater number of thinner plates within each cell. - ANS T or F:
Compared to deep cycle (house) batteries, cranking batteries will have thicker lead plates to
facilitate the higher, short-duration current draws.
Cranking - ANS Which type of battery generally recharges faster? Deep cycle or cranking?
Wire brush and backing soda. - ANS What tool and common household staple are used to
clean battery terminals?
Most of the sulfuric acid has been absorbed into the lead plates, leaving mostly water in the
electrolyte. - ANS Why might a fully-discharged wet-cell type battery freeze?
1 inch, 90 lbs or 2x the battery weight, for 1 minute in each direction. - ANS Batteries must be
secured to prevent movement of more than ______ inches in any direction when a pulling force
of _____ or _____, whichever is less, is applied through the center of gravity of the battery for
how long?
True - ANS T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material - ANS 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 - ANS 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)
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, 90 minutes - ANS According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V - ANS 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 - ANS 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 - ANS 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 battery backed memories; safety
equipment such as bilge pumps, alarms, CO detectors, bilge blowers; battery chargers; I'm
pressed current systems. - ANS Per ABYC E-10, a battery switch must be installed in the
positive conductor from each battery bank with a CCA rating greater than ____ (or greater than
_____ Ah if CCA rating not available).
AIC = 5000 Amps (E-11 table IV-A) - ANS 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 rating. - ANS What is the minimum
ampere interrupting capacity (AIC) for main overcurrent protection on a battery bank rated at
more than 2200 CCA or more than 500 Ahr?
False. "Readily accessible" defines entry into the engine room in an emergency as dangerous -
use a remote battery switch. - ANS T or F: it is ok to mount a battery switch inside an engine
room, because ABYC startes that it must be located as close to the batteries as practical.
4 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
