ABYC Marine Electrical Certification Exam 2025 | Marine Electrical
Certification Exam | Questions and Correct Answers | Verified Answers | Just
Released
Every 18 inches. - (CORRECT ANSWER)How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - (CORRECT ANSWER)What type of clamps are to be used for
supporting wire bundles when routed over engines and machinery?
40 lbs (E-11 Table XV) - (CORRECT ANSWER)What tensile force must a 10 Gauge crimp connector
withstand for one minute?
36 inches - (CORRECT ANSWER)What is the max allowed unsupported cable length for battery cables?
True - (CORRECT ANSWER)T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed.
C. Unwanted open - (CORRECT ANSWER)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 - (CORRECT ANSWER)The primary by-product of excessive electrical resistance is:
A. Increased Amperage
B. Increased Voltage
C. Reduced Ambient Temperature
D. Heat
, 2
1 HP = 746 Watts - (CORRECT ANSWER)One HP = how many watts?
D. TDR (time-domain reflectometer) - (CORRECT ANSWER)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 - (CORRECT ANSWER)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 - (CORRECT ANSWER)DC grounded conductors on new boats that are also equipped with AC
systems should use what color insulated wire?
16 AWG - (CORRECT ANSWER)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. - (CORRECT ANSWER)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 - (CORRECT ANSWER)Which type of battery generally recharges faster? Deep cycle or cranking?
Wire brush and backing soda. - (CORRECT ANSWER)What tool and common household staple are used
to clean battery terminals?
, 3
Most of the sulfuric acid has been absorbed into the lead plates, leaving mostly water in the electrolyte.
- (CORRECT ANSWER)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. - (CORRECT ANSWER)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 - (CORRECT ANSWER)T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material - (CORRECT ANSWER)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 - (CORRECT ANSWER)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 - (CORRECT ANSWER)According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V - (CORRECT ANSWER)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 - (CORRECT ANSWER)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 - (CORRECT ANSWER)What is the largest guage wire that may be connected to a bettery with
wing-nuts?
, 4
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.
- (CORRECT ANSWER)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) - (CORRECT ANSWER)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. - (CORRECT ANSWER)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. - (CORRECT ANSWER)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.
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. - (CORRECT ANSWER)Explain the "7-40-72"
rule
Resetting mechanism cannot overrid over current interrupting mechanism. (Note: some residential
breakers are not trip free) - (CORRECT ANSWER)What does "trip free" breaker mean?
C. 14.1 V - (CORRECT ANSWER)The maximum sustained charging voltage acceptable to some gell cell
battery manufacturers is:
A. 13.8 V
B. 14.5 V
Certification Exam | Questions and Correct Answers | Verified Answers | Just
Released
Every 18 inches. - (CORRECT ANSWER)How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - (CORRECT ANSWER)What type of clamps are to be used for
supporting wire bundles when routed over engines and machinery?
40 lbs (E-11 Table XV) - (CORRECT ANSWER)What tensile force must a 10 Gauge crimp connector
withstand for one minute?
36 inches - (CORRECT ANSWER)What is the max allowed unsupported cable length for battery cables?
True - (CORRECT ANSWER)T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed.
C. Unwanted open - (CORRECT ANSWER)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 - (CORRECT ANSWER)The primary by-product of excessive electrical resistance is:
A. Increased Amperage
B. Increased Voltage
C. Reduced Ambient Temperature
D. Heat
, 2
1 HP = 746 Watts - (CORRECT ANSWER)One HP = how many watts?
D. TDR (time-domain reflectometer) - (CORRECT ANSWER)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 - (CORRECT ANSWER)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 - (CORRECT ANSWER)DC grounded conductors on new boats that are also equipped with AC
systems should use what color insulated wire?
16 AWG - (CORRECT ANSWER)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. - (CORRECT ANSWER)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 - (CORRECT ANSWER)Which type of battery generally recharges faster? Deep cycle or cranking?
Wire brush and backing soda. - (CORRECT ANSWER)What tool and common household staple are used
to clean battery terminals?
, 3
Most of the sulfuric acid has been absorbed into the lead plates, leaving mostly water in the electrolyte.
- (CORRECT ANSWER)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. - (CORRECT ANSWER)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 - (CORRECT ANSWER)T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material - (CORRECT ANSWER)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 - (CORRECT ANSWER)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 - (CORRECT ANSWER)According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V - (CORRECT ANSWER)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 - (CORRECT ANSWER)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 - (CORRECT ANSWER)What is the largest guage wire that may be connected to a bettery with
wing-nuts?
, 4
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.
- (CORRECT ANSWER)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) - (CORRECT ANSWER)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. - (CORRECT ANSWER)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. - (CORRECT ANSWER)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.
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. - (CORRECT ANSWER)Explain the "7-40-72"
rule
Resetting mechanism cannot overrid over current interrupting mechanism. (Note: some residential
breakers are not trip free) - (CORRECT ANSWER)What does "trip free" breaker mean?
C. 14.1 V - (CORRECT ANSWER)The maximum sustained charging voltage acceptable to some gell cell
battery manufacturers is:
A. 13.8 V
B. 14.5 V
