ABYC Marine Electrical Certification Exam Review and Answers
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Course
ABYC Marine Electrical Certification
Institution
ABYC Marine Electrical Certification
ABYC Marine Electrical Certification Exam Review and Answers
Every 18 inches. - AnswersHow often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - AnswersWhat type of clamps are to be used for supporting wire bundles when routed over engines and machine...
ABYC Marine Electrical Certification Exam
Review and Answers
Every 18 inches. - Answers✓✓How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - Answers✓✓What type of clamps are to be used for
supporting wire bundles when routed over engines and machinery?
40 lbs (E-11 Table XV) - Answers✓✓What tensile force must a 10 Gauge crimp connector
withstand for one minute?
36 inches - Answers✓✓What is the max allowed unsupported cable length for battery cables?
True - Answers✓✓T or F: Running AC and DC conductors together is allowed so long as the
AC conductors are sheathed.
C. Unwanted open - Answers✓✓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 - Answers✓✓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 - Answers✓✓One HP = how many watts?
D. TDR (time-domain reflectometer) - Answers✓✓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 - Answers✓✓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 - Answers✓✓DC grounded conductors on new boats that are also equipped with AC
systems should use what color insulated wire?
16 AWG - Answers✓✓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. - Answers✓✓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 - Answers✓✓Which type of battery generally recharges faster? Deep cycle or
cranking?
Wire brush and backing soda. - Answers✓✓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. - Answers✓✓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. - Answers✓✓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 - Answers✓✓T or F: it is ok to install batteries directly below an uninterrupted fuel line?
Must be protected with dielectric insulating material - Answers✓✓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 - Answers✓✓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 - Answers✓✓According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V - Answers✓✓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 - Answers✓✓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 - Answers✓✓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. - Answers✓✓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) - Answers✓✓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. - Answers✓✓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. - Answers✓✓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. - Answers✓✓Explain the "7-
40-72" rule
Resetting mechanism cannot overrid over current interrupting mechanism. (Note: some
residential breakers are not trip free) - Answers✓✓What does "trip free" breaker mean?
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