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ABYC MARINE ELECTRICAL CERTIFICATION EXAM NEWEST
2025/2026 ACTUAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (100% VERIFIED ANSWERS)
|ALREADY GRADED A+| ||PROFESSOR VERIFIED||
Why might a fully-discharged wet-cell type battery freeze? -
ANSWER-Most of the sulfuric acid has been absorbed into the
lead plates, leaving mostly water in the electrolyte.
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? - ANSWER-1 inch, 90 lbs or 2x the
battery weight, for 1 minute in each direction.
T or F: it is ok to install batteries directly below an uninterrupted
fuel line? - ANSWER-True
What provision must be in place on any fuel line located within 12
inches of a battery terminals? - ANSWER-Must be protected with
dielectric insulating material
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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) - ANSWER-80 F, 25 Amps, 10.5 Volts
According to ABYC, what is the minimum battery reserve
capacity? - ANSWER-90 minutes
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). - ANSWER-32 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). - ANSWER-0 degrees F, 30 seconds, 7.2V
What is the largest guage wire that may be connected to a bettery
with wing-nuts? - ANSWER-8 AWG
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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). -
ANSWER-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.
What is the minimum ampere interrupting capacity (AIC) for main
overcurrent protection on a battery bank rated at 12 V, 1500
CCA? - ANSWER-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 more than 2200
CCA or more than 500 Ahr? - ANSWER-AIC = 2X mnfg's short-
circuit rating or 100X nominal Ahr rating.
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. - ANSWER-False. "Readily accessible"
defines entry into the engine room in an emergency as dangerous
- use a remote battery switch.
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Explain the "7-40-72" rule - ANSWER-Overcurrent protection
must be located withing 7 inches of the power source unless
contained within a sheath, in which case it may be up to 40 inches
away. If the power source is a battery and the conductors are
sheathed, OC may be up to 72 inches away.
What does "trip free" breaker mean? - ANSWER-Resetting
mechanism cannot overrid over current interrupting mechanism.
(Note: some residential breakers are not trip free)
The maximum sustained charging voltage acceptable to some
gell cell battery manufacturers is:
A. 13.8 V
B. 14.5 V
C. 14.1 V
D. 13.2 Vll - ANSWER-C. 14.1 V
ABYC MARINE ELECTRICAL CERTIFICATION EXAM NEWEST
2025/2026 ACTUAL EXAM WITH COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (100% VERIFIED ANSWERS)
|ALREADY GRADED A+| ||PROFESSOR VERIFIED||
Why might a fully-discharged wet-cell type battery freeze? -
ANSWER-Most of the sulfuric acid has been absorbed into the
lead plates, leaving mostly water in the electrolyte.
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? - ANSWER-1 inch, 90 lbs or 2x the
battery weight, for 1 minute in each direction.
T or F: it is ok to install batteries directly below an uninterrupted
fuel line? - ANSWER-True
What provision must be in place on any fuel line located within 12
inches of a battery terminals? - ANSWER-Must be protected with
dielectric insulating material
,2|Page
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) - ANSWER-80 F, 25 Amps, 10.5 Volts
According to ABYC, what is the minimum battery reserve
capacity? - ANSWER-90 minutes
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). - ANSWER-32 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). - ANSWER-0 degrees F, 30 seconds, 7.2V
What is the largest guage wire that may be connected to a bettery
with wing-nuts? - ANSWER-8 AWG
,3|Page
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). -
ANSWER-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.
What is the minimum ampere interrupting capacity (AIC) for main
overcurrent protection on a battery bank rated at 12 V, 1500
CCA? - ANSWER-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 more than 2200
CCA or more than 500 Ahr? - ANSWER-AIC = 2X mnfg's short-
circuit rating or 100X nominal Ahr rating.
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. - ANSWER-False. "Readily accessible"
defines entry into the engine room in an emergency as dangerous
- use a remote battery switch.
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Explain the "7-40-72" rule - ANSWER-Overcurrent protection
must be located withing 7 inches of the power source unless
contained within a sheath, in which case it may be up to 40 inches
away. If the power source is a battery and the conductors are
sheathed, OC may be up to 72 inches away.
What does "trip free" breaker mean? - ANSWER-Resetting
mechanism cannot overrid over current interrupting mechanism.
(Note: some residential breakers are not trip free)
The maximum sustained charging voltage acceptable to some
gell cell battery manufacturers is:
A. 13.8 V
B. 14.5 V
C. 14.1 V
D. 13.2 Vll - ANSWER-C. 14.1 V
