1|Page
ABYC MARINE ELECTRICAL CERTIFICATION EXAM
NEWEST 2026 ACTUAL EXAM TEST BANK| MARINE
TECHNICIAN CERTIFICATION EXAM PREP WITH
COMPLETE 350 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ GRADED A+
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) - ANSWER - D. TDR (time-
domain reflectometer)
Most engine-driven alternators are optimally spun at what percentage of
engine RPMs?
A. Between 10% and 50%
B. Less than 10%
C. Between 150% and 200%
D. Greater than 200% - ANSWER - C. Between 150% and 200%
A customer is complaining about low-voltage at the AC panel. What
should you do first?
A. Re-calibrate the panel meter
pg. 1
,2|Page
B. Check the voltage at the dock pedestal
C. Check the polarity indicator
D. Replace the overcurrent device - ANSWER - B. Check the voltage at
the dock pedestal
What is a likely cause of non-functioning galvanic isolator?
A. a shorted isolator diode
B. Improper current rating of the isolator diode
C. An on-board neutral-to-ground connection
D. All of the above are possible - ANSWER - D. All of the above are
possible
A customer complains that her generator will start from the local control
panel at the generator, but not from the remote control panel at the helm.
Which of the following is the most probably cause?
A. Bad generator starter solenoid
B. Low voltage at the starter battery
C. Excessive voltage drop across the remote starter switch
D. Loose battery cable clamp at the starter battery - ANSWER - C.
Excessive voltage drop across the remote starter switch
On a brushless generator, a possible cause for low AC voltage output
under load could be:
A. High engine RPM
pg. 2
,3|Page
B. Faulty exciter winding / diode rectifier circuit
C. Faulty output circuit breaker
D. Excessively high DC voltage supply - ANSWER - B. Faulty exciter
winding / diode rectifier circuit
To test a 120V AC element in a hot water heater, the tech may run a
_____ test.
A. Voltage
B. Capacitance
C. Continuity
D. Inductance - ANSWER - C. Continuity
According to ABYC, maximum current carrying capacity of a 10 gauge
wire, 105 degree C insulation, inside the engine room when bundled
with 2 other current carrying wires would be?
A. 60 amps
B. 51 amps
C. 42 amps
D. 35.7 amps - ANSWER - D. 35.7 amps
Sheathed ungrounded conductors connected directly to a battery must
have overcurrent protection devices located within inches of the
connection to the battery.
A. 7 "
pg. 3
, 4|Page
B. 36" {slightly less than 1 meter)
C. 40 "
D. 72" - ANSWER - D. 72"
In a series circuit, the more resistive loads you add:
A. The total voltage will increase
B. The total current will increase
C. The total voltage will decrease
D. The total current will decrease - ANSWER - D. The total current will
decrease
The maximum number of terminals to be attached to any one terminal
stud based on ABYC Standard is:
A. 1
B. 2
C. 3
D. 4 - ANSWER - D. 4
Maximum current carrying capacity for an flexible cord of 16 AWG with
2 current carrying conductors inside the engine spaces is
A. 6 amps
B. 8 amps
C. 10 amps
pg. 4
ABYC MARINE ELECTRICAL CERTIFICATION EXAM
NEWEST 2026 ACTUAL EXAM TEST BANK| MARINE
TECHNICIAN CERTIFICATION EXAM PREP WITH
COMPLETE 350 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ GRADED A+
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) - ANSWER - D. TDR (time-
domain reflectometer)
Most engine-driven alternators are optimally spun at what percentage of
engine RPMs?
A. Between 10% and 50%
B. Less than 10%
C. Between 150% and 200%
D. Greater than 200% - ANSWER - C. Between 150% and 200%
A customer is complaining about low-voltage at the AC panel. What
should you do first?
A. Re-calibrate the panel meter
pg. 1
,2|Page
B. Check the voltage at the dock pedestal
C. Check the polarity indicator
D. Replace the overcurrent device - ANSWER - B. Check the voltage at
the dock pedestal
What is a likely cause of non-functioning galvanic isolator?
A. a shorted isolator diode
B. Improper current rating of the isolator diode
C. An on-board neutral-to-ground connection
D. All of the above are possible - ANSWER - D. All of the above are
possible
A customer complains that her generator will start from the local control
panel at the generator, but not from the remote control panel at the helm.
Which of the following is the most probably cause?
A. Bad generator starter solenoid
B. Low voltage at the starter battery
C. Excessive voltage drop across the remote starter switch
D. Loose battery cable clamp at the starter battery - ANSWER - C.
Excessive voltage drop across the remote starter switch
On a brushless generator, a possible cause for low AC voltage output
under load could be:
A. High engine RPM
pg. 2
,3|Page
B. Faulty exciter winding / diode rectifier circuit
C. Faulty output circuit breaker
D. Excessively high DC voltage supply - ANSWER - B. Faulty exciter
winding / diode rectifier circuit
To test a 120V AC element in a hot water heater, the tech may run a
_____ test.
A. Voltage
B. Capacitance
C. Continuity
D. Inductance - ANSWER - C. Continuity
According to ABYC, maximum current carrying capacity of a 10 gauge
wire, 105 degree C insulation, inside the engine room when bundled
with 2 other current carrying wires would be?
A. 60 amps
B. 51 amps
C. 42 amps
D. 35.7 amps - ANSWER - D. 35.7 amps
Sheathed ungrounded conductors connected directly to a battery must
have overcurrent protection devices located within inches of the
connection to the battery.
A. 7 "
pg. 3
, 4|Page
B. 36" {slightly less than 1 meter)
C. 40 "
D. 72" - ANSWER - D. 72"
In a series circuit, the more resistive loads you add:
A. The total voltage will increase
B. The total current will increase
C. The total voltage will decrease
D. The total current will decrease - ANSWER - D. The total current will
decrease
The maximum number of terminals to be attached to any one terminal
stud based on ABYC Standard is:
A. 1
B. 2
C. 3
D. 4 - ANSWER - D. 4
Maximum current carrying capacity for an flexible cord of 16 AWG with
2 current carrying conductors inside the engine spaces is
A. 6 amps
B. 8 amps
C. 10 amps
pg. 4
