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ABYC MARINE ELECTRICAL CERTIFICATION EXAM
BANK 2025/2026 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALL ANSWERED {270 Q & A} ALREADY
GRADED A+/ ABYC MARINE ELECTRICAL
CERTIFICATION EXAM REVIEW | BRAND NEW!
How much current should flow through the DC grounded
conductor in a 15-amp DC lighting circuit?
a. 15 amps
b. 0 amps
c. 10 amps
d. None of the above - ✔✔✔ Correct Answer > a. 15 amps
A light circuit uses a 12 volt battery to power a bulb which uses
2.5 amps of power. How many watts Is the light bulb?
a. 10 W
b. 20 W
c. 30 W
d. 40 W - ✔✔✔ Correct Answer > c. 30 W
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You're installing a 500 GPH bilge pump to be used as a shower
pump (just to drain the shower grey-water). It draws 8 amps, is
20' from the distribution panel, and operates at 12 volts. Using the
ABYC voltage drop table, what size wire is needed?
a. 14
b. 8
c. 10
d. 12 - ✔✔✔ Correct Answer > b. 8 AWG (using E-11 Table IX, 3% voltage
drop, 40' total distance, 10 Amps)
A branch circuit for DC power can have overcurrent protection
not to exceed _____ of conductor ampacity.
a. 125%
b. 135%
c. 150%
d. Not required - ✔✔✔ Correct Answer > c. 150% (see 11.10.1.5.2)
Two technicians are discussing increasing the number of
traditional lead-acid golf cart batteries on a customer's vessel
from 4 to 8. Both technicians agree that batteries have to be
accessible for inspection and maintenance according to the
NFPA. Technician A says that the batteries must be in a vented
box and secure. Technician B says that boxes are not necessary
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and a sealed composite tray matching what the boat already has
would be fine and looks better. Who is correct?
a. Technician A
b. Technician B
c. Both A & B are correct
d. Neither - ✔✔✔ Correct Answer > b. Technician B
What is the closest distance an unshielded metallic fuel system
component can be to a battery terminal?
a. 8"
b. 12"
c. 16"
d. 24" - ✔✔✔ Correct Answer > b. 12" (see E-10.7.8)
When can a flat washer be used on a battery terminal?
a. When it has a resistance of less than .01 ohms
b. When installed immediately under a wing nut
c. When installed in between the base of the battery terminal and
the conductor terminal.
d. When installed immediately under a split lock washer and nut.
- ✔✔✔ Correct Answer > d. When installed immediately under a split
lock washer and nut. (see E-10.8.5)
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When grounding an electrical propulsion system you should
always remember too...
a. Isolate the grounding system from the main ship grounding
system.
b. Install a blocking diode between it and your main ground bus.
c. Tie your ground into your bonding system.
d. Combine it with your main grounding system. - ✔✔✔ Correct
Answer > a. Isolate the grounding system from the main ship
grounding system. (see E-30.5.2)
Of the following which is NOT a correct way of testing a battery.
a. Use a load tester
b. Keep track of amps going in and out with an amp hour meter
c. Checking voltage drop when engaging starter motor
d. Measure open circuit voltage - ✔✔✔ Correct Answer > c. Checking
voltage drop when engaging starter motor (Calder p. 78)
The minimal battery reserve capacity in minutes for a supplied
battery power, based on ABYC.
A. 30 min
B. 90 min
C. 120 min
D. 200 min - ✔✔✔ Correct Answer > B. 90 min
ABYC MARINE ELECTRICAL CERTIFICATION EXAM
BANK 2025/2026 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) ALL ANSWERED {270 Q & A} ALREADY
GRADED A+/ ABYC MARINE ELECTRICAL
CERTIFICATION EXAM REVIEW | BRAND NEW!
How much current should flow through the DC grounded
conductor in a 15-amp DC lighting circuit?
a. 15 amps
b. 0 amps
c. 10 amps
d. None of the above - ✔✔✔ Correct Answer > a. 15 amps
A light circuit uses a 12 volt battery to power a bulb which uses
2.5 amps of power. How many watts Is the light bulb?
a. 10 W
b. 20 W
c. 30 W
d. 40 W - ✔✔✔ Correct Answer > c. 30 W
,2|Page
You're installing a 500 GPH bilge pump to be used as a shower
pump (just to drain the shower grey-water). It draws 8 amps, is
20' from the distribution panel, and operates at 12 volts. Using the
ABYC voltage drop table, what size wire is needed?
a. 14
b. 8
c. 10
d. 12 - ✔✔✔ Correct Answer > b. 8 AWG (using E-11 Table IX, 3% voltage
drop, 40' total distance, 10 Amps)
A branch circuit for DC power can have overcurrent protection
not to exceed _____ of conductor ampacity.
a. 125%
b. 135%
c. 150%
d. Not required - ✔✔✔ Correct Answer > c. 150% (see 11.10.1.5.2)
Two technicians are discussing increasing the number of
traditional lead-acid golf cart batteries on a customer's vessel
from 4 to 8. Both technicians agree that batteries have to be
accessible for inspection and maintenance according to the
NFPA. Technician A says that the batteries must be in a vented
box and secure. Technician B says that boxes are not necessary
,3|Page
and a sealed composite tray matching what the boat already has
would be fine and looks better. Who is correct?
a. Technician A
b. Technician B
c. Both A & B are correct
d. Neither - ✔✔✔ Correct Answer > b. Technician B
What is the closest distance an unshielded metallic fuel system
component can be to a battery terminal?
a. 8"
b. 12"
c. 16"
d. 24" - ✔✔✔ Correct Answer > b. 12" (see E-10.7.8)
When can a flat washer be used on a battery terminal?
a. When it has a resistance of less than .01 ohms
b. When installed immediately under a wing nut
c. When installed in between the base of the battery terminal and
the conductor terminal.
d. When installed immediately under a split lock washer and nut.
- ✔✔✔ Correct Answer > d. When installed immediately under a split
lock washer and nut. (see E-10.8.5)
, 4|Page
When grounding an electrical propulsion system you should
always remember too...
a. Isolate the grounding system from the main ship grounding
system.
b. Install a blocking diode between it and your main ground bus.
c. Tie your ground into your bonding system.
d. Combine it with your main grounding system. - ✔✔✔ Correct
Answer > a. Isolate the grounding system from the main ship
grounding system. (see E-30.5.2)
Of the following which is NOT a correct way of testing a battery.
a. Use a load tester
b. Keep track of amps going in and out with an amp hour meter
c. Checking voltage drop when engaging starter motor
d. Measure open circuit voltage - ✔✔✔ Correct Answer > c. Checking
voltage drop when engaging starter motor (Calder p. 78)
The minimal battery reserve capacity in minutes for a supplied
battery power, based on ABYC.
A. 30 min
B. 90 min
C. 120 min
D. 200 min - ✔✔✔ Correct Answer > B. 90 min
