ABYC Marine Electrical
Certification Exam Study Guide
– Practice Questions with
Verified Answers. GRADED A+.
Latest 2026/2027 Update
Every 18 inches. - Answer✔✔-How often (in inches) shall wire bundles be
supported?
Insulated Metallic Hanger Clamps - 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) - Answer✔✔-What tensile force must a 10 Gauge crimp
connector withstand for one minute?
36 inches - Answer✔✔-What is the max allowed unsupported cable length for
battery cables?
True - Answer✔✔-T or F: Running AC and DC conductors together is allowed so
long as the AC conductors are sheathed.
,C. Unwanted open - 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 - Answer✔✔-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 - Answer✔✔-One HP = how many watts?
D. TDR (time-domain reflectometer) - 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 - 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 - Answer✔✔-DC grounded conductors on new boats that are also
equipped with AC systems should use what color insulated wire?
16 AWG - 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. -
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 - Answer✔✔-Which type of battery generally recharges faster? Deep
cycle or cranking?
Wire brush and backing soda. - Answer✔✔-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. - 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. -
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 - Answer✔✔-T or F: it is ok to install batteries directly below an
uninterrupted fuel line?
Must be protected with dielectric insulating material - 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 - 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 - Answer✔✔-According to ABYC, what is the minimum battery
reserve capacity?
32 degrees F, 30 seconds, 7.2V - 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 - 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 - Answer✔✔-What is the largest guage wire that may be connected to a
bettery with wing-nuts?
Certification Exam Study Guide
– Practice Questions with
Verified Answers. GRADED A+.
Latest 2026/2027 Update
Every 18 inches. - Answer✔✔-How often (in inches) shall wire bundles be
supported?
Insulated Metallic Hanger Clamps - 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) - Answer✔✔-What tensile force must a 10 Gauge crimp
connector withstand for one minute?
36 inches - Answer✔✔-What is the max allowed unsupported cable length for
battery cables?
True - Answer✔✔-T or F: Running AC and DC conductors together is allowed so
long as the AC conductors are sheathed.
,C. Unwanted open - 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 - Answer✔✔-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 - Answer✔✔-One HP = how many watts?
D. TDR (time-domain reflectometer) - 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 - 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 - Answer✔✔-DC grounded conductors on new boats that are also
equipped with AC systems should use what color insulated wire?
16 AWG - 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. -
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 - Answer✔✔-Which type of battery generally recharges faster? Deep
cycle or cranking?
Wire brush and backing soda. - Answer✔✔-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. - 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. -
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 - Answer✔✔-T or F: it is ok to install batteries directly below an
uninterrupted fuel line?
Must be protected with dielectric insulating material - 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 - 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 - Answer✔✔-According to ABYC, what is the minimum battery
reserve capacity?
32 degrees F, 30 seconds, 7.2V - 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 - 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 - Answer✔✔-What is the largest guage wire that may be connected to a
bettery with wing-nuts?
