ABYC Marine Electrical Certification Exam Review ABYC Marine Electrical Certification Exam Review Page 1 of 51
ABYC Marine Electrical Certification
Exam Review
What gauge wire required for lighting system secondary conductor?
6 awg
(T or F) Impedance can be defined as the total resistance flow in a D.C. system F (impedance refers to
AC systems)
11.4 Amp current draw, use 15 Amp breaker You are installing a 220 volt electric heater in a boat.
The heater is rated at 2500 watts. How many amps will it draw? What size circuit breaker would you
use?
A 120V hot water heater is rated at 1750 watts. How much current does it use:
a. 12.5 Amps
b. 12.5 Ohms
c. 14.6 Amps
d. 14.6 Volts c. 14.6 Amps (not Volts!!)
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 c. 150% (see 11.10.1.5.2)
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 foillowing is the most probably cause?
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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 C. Excessive voltage drop across the remote
starter switch
A customer has a 600 Ah 'house' battery bank and wants to recharge with the highest amperage
(standard flooded batteries are being used). How high amperage is reasonable?
a. 200 amps
b. 150 amps
c. 100 amps
d. 50 amps b. 150 amps (25% of capacity)
A customer is complaining about low-voltage at the AC panel. What should you do first?
A. Re-calibrate the panel meter
B. Check the voltage at the dock pedestal
C. Check the polarity indicator
D. Replace the overcurrent device B. Check the voltage at the dock pedestal
A customer notes a reverse-polarity problem. All of the following are likely causes, except:
A. Improperly wired shore power cord
B. Improperly wired shore power inlet receptacle
C. An open neutral
D. Reversal of the hot and neutral conductors in the AC panel feeder cable C. An open neutral
A deep cycle battery is one with an internal design that suits:
a. low amperage long term discharge
b. high amperage long term discharge
c. low amperage short term discharge
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d. high amperage short term discharge a. low amperage long term discharge
A diode is a semiconductor that passes current
a. in any direction
b. only with high voltages
c. only in one direction
d. when used as a triggering device c. only in one direction
A fully charged 12 volt battery, after a period of rest during which nothing has been put in or taken out,
should have a fully charged voltage of:
a. 12.0 - 12.2 volts
b. 12.2 - 12.4 volts
c. 12.4 - 12.6 volts
d. 12.6 - 12.8 volts d. 12.6 - 12.8 volts
A fully charged battery, at rest will have a voltage of:
a. 12.2
b. 11.5
c. 12.7
d. 13.2 c. 12.7
A gassing battery gives off:
a. sulfuroxide
b. nitrous oxide
c. nitrogen
d. hydrogen d. hydrogen
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?
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a. 10 W
b. 20 W
c. 30 W
d. 40 W c. 30 W
A neutral safety switch is used for:
a. Safely switching between forward and reverse without damaging transmission
b. Not allowing the engine to start with gear in neutral
c. Safely allowing someone to be in the water (like skier) without risk of propeller strike
d. Not allowing the engine to start when not in neutral d. Not allowing the engine to start when not in
neutral
A panelboard or switchboard with no sub-main circuit breaker or fuse shall have installed, at the source
of power, overcurrent protection not to exceed _______ of the load capacity of that panel, or the
current carrying capacity of the feeders.
a. 100%
b. 120%
c. 135%
d. 150%a. 100% (see E-11.10.1.5.4)
A polarity indicator light that is glowing more dimly than normal could be an indicator of:
A. An open circuit in the neutral to ground link at an AC generator
B. An open circuit in the hot wire connection
C. A ground connection with very low impedance
D. Excessive AC frequency A. An open circuit in the neutral to ground link at an AC generator
A successful customer experience includes:
a. Being neat and prompt
b. Asking question to verify a complaint
c. Listening to the customer
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ABYC Marine Electrical Certification
Exam Review
What gauge wire required for lighting system secondary conductor?
6 awg
(T or F) Impedance can be defined as the total resistance flow in a D.C. system F (impedance refers to
AC systems)
11.4 Amp current draw, use 15 Amp breaker You are installing a 220 volt electric heater in a boat.
The heater is rated at 2500 watts. How many amps will it draw? What size circuit breaker would you
use?
A 120V hot water heater is rated at 1750 watts. How much current does it use:
a. 12.5 Amps
b. 12.5 Ohms
c. 14.6 Amps
d. 14.6 Volts c. 14.6 Amps (not Volts!!)
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 c. 150% (see 11.10.1.5.2)
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 foillowing is the most probably cause?
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,ABYC Marine Electrical Certification Exam Review ABYC Marine Electrical Certification Exam Review Page 2 of 51
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 C. Excessive voltage drop across the remote
starter switch
A customer has a 600 Ah 'house' battery bank and wants to recharge with the highest amperage
(standard flooded batteries are being used). How high amperage is reasonable?
a. 200 amps
b. 150 amps
c. 100 amps
d. 50 amps b. 150 amps (25% of capacity)
A customer is complaining about low-voltage at the AC panel. What should you do first?
A. Re-calibrate the panel meter
B. Check the voltage at the dock pedestal
C. Check the polarity indicator
D. Replace the overcurrent device B. Check the voltage at the dock pedestal
A customer notes a reverse-polarity problem. All of the following are likely causes, except:
A. Improperly wired shore power cord
B. Improperly wired shore power inlet receptacle
C. An open neutral
D. Reversal of the hot and neutral conductors in the AC panel feeder cable C. An open neutral
A deep cycle battery is one with an internal design that suits:
a. low amperage long term discharge
b. high amperage long term discharge
c. low amperage short term discharge
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d. high amperage short term discharge a. low amperage long term discharge
A diode is a semiconductor that passes current
a. in any direction
b. only with high voltages
c. only in one direction
d. when used as a triggering device c. only in one direction
A fully charged 12 volt battery, after a period of rest during which nothing has been put in or taken out,
should have a fully charged voltage of:
a. 12.0 - 12.2 volts
b. 12.2 - 12.4 volts
c. 12.4 - 12.6 volts
d. 12.6 - 12.8 volts d. 12.6 - 12.8 volts
A fully charged battery, at rest will have a voltage of:
a. 12.2
b. 11.5
c. 12.7
d. 13.2 c. 12.7
A gassing battery gives off:
a. sulfuroxide
b. nitrous oxide
c. nitrogen
d. hydrogen d. hydrogen
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?
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a. 10 W
b. 20 W
c. 30 W
d. 40 W c. 30 W
A neutral safety switch is used for:
a. Safely switching between forward and reverse without damaging transmission
b. Not allowing the engine to start with gear in neutral
c. Safely allowing someone to be in the water (like skier) without risk of propeller strike
d. Not allowing the engine to start when not in neutral d. Not allowing the engine to start when not in
neutral
A panelboard or switchboard with no sub-main circuit breaker or fuse shall have installed, at the source
of power, overcurrent protection not to exceed _______ of the load capacity of that panel, or the
current carrying capacity of the feeders.
a. 100%
b. 120%
c. 135%
d. 150%a. 100% (see E-11.10.1.5.4)
A polarity indicator light that is glowing more dimly than normal could be an indicator of:
A. An open circuit in the neutral to ground link at an AC generator
B. An open circuit in the hot wire connection
C. A ground connection with very low impedance
D. Excessive AC frequency A. An open circuit in the neutral to ground link at an AC generator
A successful customer experience includes:
a. Being neat and prompt
b. Asking question to verify a complaint
c. Listening to the customer
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