ABYC MARINE ELECTRICAL CERTIFICATION EXAM: 2025/2026 |REAL TESTING
EXAM QUESTIONS WITH VERIFIED ANSWERS FOR GUARANTEED PASS | LATEST
UPDATE|GRADED A+
1. What is the maximum spacing for cable run support based on ABYC? - ANSWER 18"
2. The smallest gauge allowable for unsheathed wire runs through the boat is? - ANSWER 16 AWG
3.___ through circuits on a boat is perhaps the most common problem with electrical circuitry.
A Overly high rates of current flow
B Resistance to heat
C Unrestricted pressure
D Resistance to electrical current flow - ANSWER D Resistance to electrical current flow
4. T or F: An acceptable way to check for loss of ground in an AC circuit is to plug a light bulb into a
receptacle's hot and ground. - ANSWER True
5. The tool of choice for testing AC generator winding insulation integrity is a:
a. TDR
b. Fox and Hound
c. Megohmmeter
d. Clamp Type ammeter - ANSWER c. Megohmmeter
6. Technician A says that a generator's neutral and ground must be connected together at the generator.
Technician B says that they must be kept separate. Which is correct?
a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B - ANSWER a. Technician A
,7. If a generator set is equipped with a sound shield, the shield shall
a. have a fire suppression access port
b. have a minimum sound intensity of 77dB as measured on the decibel C scale inside the occupancy
spaces of the vessel.
c. Provide access to raw water pump drive belt without the need for hand tools.
d. Not have screens, baffles, grilles or other means to prevent accidental contact with moving parts. -
ANSWER a. have a fire suppression access port
8. If a generator is not self limiting, the power feeder conductor from the generator shall be sized to
accommodate the generator's maximum rated output and shall be protected at the generator with
overcurrent protection devices whose rating shall not exceed of the generator rated output .
A. 100%
B. 120%
C. 125%
D. 150% - ANSWER B. 120% (see E-11.6.2.3.2)
9. When using Ohm's law, if any two of the three values are known, the third value can be calculated by
___.
A multiplication or division
B addition or subtraction
C taking the square root of the sum of the two values
D finding the inverse of the highest known value - ANSWER A multiplication or division
10. If the voltage in a circuit is 12 volts and the resistance is 3 ohms, Ohm's law can be used to find that
the rate of flow is ___ amps.
A9
B6
C4
D 2 - ANSWER C. 4
11. If resistance decreases and the voltage remains constant in a circuit, then the amperage will ___.
,A decrease
B increase
C remain constant
D be canceled out - ANSWER B increase
12. The unit of measure for power is the ___.
A watt
B amp
C volt
D ohm - ANSWER A watt
13. A microwave oven with a wattage of 1.2 KW (1,200 watts) and a 120 VAC will draw ___ amps.
A 100
B 60
C 20
D 10 - ANSWER D 10
14. Cranking motor (engine starter) circuits are not required to have ___. - ANSWER overcurrent
protection
15. In a ___ circuit, there is only one path allowed for electrical flow.
A parallel
B simple
C series
D starter - ANSWER C series
16. In a series circuit, the amperage (current) is ___.
A the same everywhere it is measured
B gradually decreased as the circuit runs farther from the power source
, C lowest at (or very close to) the power source
D gradually increased as the circuit runs farther from the power source - ANSWER the same everywhere
it is measured
17. In all circuits, voltage is lost as it travels through the circuit, which is commonly referred to as ___.
A electrical resistance
B voltage drop
C short circuiting
D open circuiting - ANSWER B voltage drop
18. The most common type of circuit fault is a(n) ___.
A burnt-out circuit
B intercircuit short
C open circuit
D internal short - ANSWER C open circuit (Really should be Unwanted Open)
19. The ___ is the most dangerous type of short circuit.
A open circuit
B internal short
C intercircuit short
D short circuit to ground - ANSWER D short circuit to ground
20. Intercircuit shorts are usually caused by ___.
A inadequate ventilation in the area where the circuit is installed
B water migration into a device
C an errant screw sticking through a loom or wiring harness
D insulation breakdown of the circuit components - ANSWER C an errant screw sticking through a loom
or wiring harness
EXAM QUESTIONS WITH VERIFIED ANSWERS FOR GUARANTEED PASS | LATEST
UPDATE|GRADED A+
1. What is the maximum spacing for cable run support based on ABYC? - ANSWER 18"
2. The smallest gauge allowable for unsheathed wire runs through the boat is? - ANSWER 16 AWG
3.___ through circuits on a boat is perhaps the most common problem with electrical circuitry.
A Overly high rates of current flow
B Resistance to heat
C Unrestricted pressure
D Resistance to electrical current flow - ANSWER D Resistance to electrical current flow
4. T or F: An acceptable way to check for loss of ground in an AC circuit is to plug a light bulb into a
receptacle's hot and ground. - ANSWER True
5. The tool of choice for testing AC generator winding insulation integrity is a:
a. TDR
b. Fox and Hound
c. Megohmmeter
d. Clamp Type ammeter - ANSWER c. Megohmmeter
6. Technician A says that a generator's neutral and ground must be connected together at the generator.
Technician B says that they must be kept separate. Which is correct?
a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B - ANSWER a. Technician A
,7. If a generator set is equipped with a sound shield, the shield shall
a. have a fire suppression access port
b. have a minimum sound intensity of 77dB as measured on the decibel C scale inside the occupancy
spaces of the vessel.
c. Provide access to raw water pump drive belt without the need for hand tools.
d. Not have screens, baffles, grilles or other means to prevent accidental contact with moving parts. -
ANSWER a. have a fire suppression access port
8. If a generator is not self limiting, the power feeder conductor from the generator shall be sized to
accommodate the generator's maximum rated output and shall be protected at the generator with
overcurrent protection devices whose rating shall not exceed of the generator rated output .
A. 100%
B. 120%
C. 125%
D. 150% - ANSWER B. 120% (see E-11.6.2.3.2)
9. When using Ohm's law, if any two of the three values are known, the third value can be calculated by
___.
A multiplication or division
B addition or subtraction
C taking the square root of the sum of the two values
D finding the inverse of the highest known value - ANSWER A multiplication or division
10. If the voltage in a circuit is 12 volts and the resistance is 3 ohms, Ohm's law can be used to find that
the rate of flow is ___ amps.
A9
B6
C4
D 2 - ANSWER C. 4
11. If resistance decreases and the voltage remains constant in a circuit, then the amperage will ___.
,A decrease
B increase
C remain constant
D be canceled out - ANSWER B increase
12. The unit of measure for power is the ___.
A watt
B amp
C volt
D ohm - ANSWER A watt
13. A microwave oven with a wattage of 1.2 KW (1,200 watts) and a 120 VAC will draw ___ amps.
A 100
B 60
C 20
D 10 - ANSWER D 10
14. Cranking motor (engine starter) circuits are not required to have ___. - ANSWER overcurrent
protection
15. In a ___ circuit, there is only one path allowed for electrical flow.
A parallel
B simple
C series
D starter - ANSWER C series
16. In a series circuit, the amperage (current) is ___.
A the same everywhere it is measured
B gradually decreased as the circuit runs farther from the power source
, C lowest at (or very close to) the power source
D gradually increased as the circuit runs farther from the power source - ANSWER the same everywhere
it is measured
17. In all circuits, voltage is lost as it travels through the circuit, which is commonly referred to as ___.
A electrical resistance
B voltage drop
C short circuiting
D open circuiting - ANSWER B voltage drop
18. The most common type of circuit fault is a(n) ___.
A burnt-out circuit
B intercircuit short
C open circuit
D internal short - ANSWER C open circuit (Really should be Unwanted Open)
19. The ___ is the most dangerous type of short circuit.
A open circuit
B internal short
C intercircuit short
D short circuit to ground - ANSWER D short circuit to ground
20. Intercircuit shorts are usually caused by ___.
A inadequate ventilation in the area where the circuit is installed
B water migration into a device
C an errant screw sticking through a loom or wiring harness
D insulation breakdown of the circuit components - ANSWER C an errant screw sticking through a loom
or wiring harness
