ABYC MARINE ELECTRICAL
CERTIFICATION EXAM
According to ABYC Standard E-11, the distance from the shore power inlet to
the main circuit over current protection should be within
a. 10'
b. 12'
c. 7"
d. 72" - ANSWERS-a. 10'
Technician A says double pole circuit breakers must be used to provide
Overcurrent protection for both the ungrounded and grounded conductors of
an AC input circuit. Technician B says simultaneous opening fuses may be used
for this application. Which is correct?
a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B - ANSWERS-a. Technician A
Technician A says that AC circuit overcurrent protection devices shall not
exceed the maximum current carrying capacity of the conductor being
protected. Technician B says it is allowable to go up to 150% over the current
allowed in table VI A-C of E-11. Which is correct?
a. Technician A
b. Technician B
,c. Neither A nor B
d. Both A and B - ANSWERS-b. Technician B
The minimum amp circuit breaker that should be used to protect a 120 volt
water heater with a 1600 watt element would be rated at ______ amps .
a. 10 amps
b. 15 amps
c. 20 amps
d. Overcurrent not listed - ANSWERS-b. 15 amps
The nominal trip rate for GFCI receptacles in the US is:
a. 5 mA
b. 10 mA
c. 15 mA
d. 30 mA - ANSWERS-a. 5 mA
The current flowing through a 120 volt AC heating element at 1800 watts is
a. 0.5 amps
b. 1.0 amps
c. 5.0 amps
d. 15.0 amps - ANSWERS-d. 15.0 amps
The total impedance of polarity indicating and protection devices connected
between normal current carrying conductors and the grounding conductor
(green wire) shall be:
,a. This is a bad question as there should be no connection between the
grounding and neutral conductors in any place other
than at a source of power.
b. No greater than 1 ohm.
c. Greater than or equal to 25,000 ohms.
d . None of the above. - ANSWERS-c. Greater than or equal to 25,000 ohms.
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. - ANSWERS-True
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 - ANSWERS-c. Megohmmeter
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 - ANSWERS-a. Technician A
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. - ANSWERS-a. have a fire suppression access port
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% - ANSWERS-B. 120% (see E-11.6.2.3.2)
Genset DC wiring shall meet all of the following requirements except
a. E-11 DC electrical systems on boats
b. Negative ground requirement
c. Crossover cranking stud connected to cranking motor
d. Current carrying parts of DC wiring attached to the engine are not required
to have overcurrent protection. - ANSWERS-c. Crossover cranking stud
connected to cranking motor
Which is NOT a correct statement regarding the automatic shut-down device
for a permanently installed Genset?
a. shuts down for excessive coolant temperature
b. shuts down for low voltage output condition
CERTIFICATION EXAM
According to ABYC Standard E-11, the distance from the shore power inlet to
the main circuit over current protection should be within
a. 10'
b. 12'
c. 7"
d. 72" - ANSWERS-a. 10'
Technician A says double pole circuit breakers must be used to provide
Overcurrent protection for both the ungrounded and grounded conductors of
an AC input circuit. Technician B says simultaneous opening fuses may be used
for this application. Which is correct?
a. Technician A
b. Technician B
c. Neither A nor B
d. Both A and B - ANSWERS-a. Technician A
Technician A says that AC circuit overcurrent protection devices shall not
exceed the maximum current carrying capacity of the conductor being
protected. Technician B says it is allowable to go up to 150% over the current
allowed in table VI A-C of E-11. Which is correct?
a. Technician A
b. Technician B
,c. Neither A nor B
d. Both A and B - ANSWERS-b. Technician B
The minimum amp circuit breaker that should be used to protect a 120 volt
water heater with a 1600 watt element would be rated at ______ amps .
a. 10 amps
b. 15 amps
c. 20 amps
d. Overcurrent not listed - ANSWERS-b. 15 amps
The nominal trip rate for GFCI receptacles in the US is:
a. 5 mA
b. 10 mA
c. 15 mA
d. 30 mA - ANSWERS-a. 5 mA
The current flowing through a 120 volt AC heating element at 1800 watts is
a. 0.5 amps
b. 1.0 amps
c. 5.0 amps
d. 15.0 amps - ANSWERS-d. 15.0 amps
The total impedance of polarity indicating and protection devices connected
between normal current carrying conductors and the grounding conductor
(green wire) shall be:
,a. This is a bad question as there should be no connection between the
grounding and neutral conductors in any place other
than at a source of power.
b. No greater than 1 ohm.
c. Greater than or equal to 25,000 ohms.
d . None of the above. - ANSWERS-c. Greater than or equal to 25,000 ohms.
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. - ANSWERS-True
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 - ANSWERS-c. Megohmmeter
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 - ANSWERS-a. Technician A
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. - ANSWERS-a. have a fire suppression access port
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% - ANSWERS-B. 120% (see E-11.6.2.3.2)
Genset DC wiring shall meet all of the following requirements except
a. E-11 DC electrical systems on boats
b. Negative ground requirement
c. Crossover cranking stud connected to cranking motor
d. Current carrying parts of DC wiring attached to the engine are not required
to have overcurrent protection. - ANSWERS-c. Crossover cranking stud
connected to cranking motor
Which is NOT a correct statement regarding the automatic shut-down device
for a permanently installed Genset?
a. shuts down for excessive coolant temperature
b. shuts down for low voltage output condition
