ABYC Marine Electrical
Certification Exam
Review
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).
Certification Exam
Review
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).
