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ABYC MARINE ELECTRICAL CERTIFICATION Exam Practice
Test Bank With 500 Real Exam Practice Questions and Correct
Verified Answers| ABYC MARINE ELECTRICAL
CERTIFICATION Prep (Latest!)
C. 14.1 V ......answer.....The maximum sustained charging voltage acceptable
to some gell cell battery manufacturers is:
A. 13.8 V
B. 14.5 V
C. 14.1 V
D. 13.2 Vll
0.050 points of specific gravity below other cells = bad cell.
......answer.....When testing a wet-cell battery with a hydrometer, what
threshold is used to determine a bad cell?
1.260 - 1.285 (temperature dependent) ......answer.....When testing a wet-cell
battery with a hydrometer, what reading indicates a fully charged battery?
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50% ......answer.....When testing a fully charged start battery for capacity
with a load tester, what % of CCA rating should be induced by the load to
test resulting voltage?
C. Between 150% and 200% ......answer.....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%
False. the battery charger case shall be tied to the engine negative
terminal/bus, along with the negative output terminal of the battery charger,
not at the battery charger case itself., ......answer.....T or F: A battery charger
case shall be tied to the DC negative output terminal at the battery charger.
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In case of an internal short to the case, the AC grounding wire would not
carry enough current. ......answer.....Why do battery chargers require a
separate case connection to main AC grounding bus and Engine negative /
DC grounding bus?
No smaller than 1 size below the DC current carrying conductors between
the charger and batteries - provided OC protection on positive DC output is
no greater than 135% of DC grounding cable ampacity and conductor is no
smaller than 16 AWG. ......answer.....What is the minimal wire size required
for a battery charger case connection to DC ground/engine negative?
Class T fuse rated for appropriate AIC ......answer.....What device is typically
found to satisfy the required OC protection between a battery charger and
the batteries?
Batteries will feed back into solar array or wind generator coil and discharge
(possibly damage). Note: many voltage regulators have integral blocking
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diodes. ......answer.....What may happen to a solar array or wind generator
used to charge batteries without a blocking diode?
24 inches or more (unless waterproof!) ......answer.....How far above bilge
water level must a battery charger be mounted?
At least 24 inches ......answer.....How far away from a gasoline tank must a
pre-wired battery charger's AC connection plug be located?
False. (only when installed in location that required GFCI per ABYC E-11)
......answer.....T or F: All marine inverters shall utilize an internal or external
GFCI on their AC outlets.
False. Most are not ignition protected. ......answer.....T or F: most GFCI
outlets can be used in a gasoline engine room
ABYC MARINE ELECTRICAL CERTIFICATION Exam Practice
Test Bank With 500 Real Exam Practice Questions and Correct
Verified Answers| ABYC MARINE ELECTRICAL
CERTIFICATION Prep (Latest!)
C. 14.1 V ......answer.....The maximum sustained charging voltage acceptable
to some gell cell battery manufacturers is:
A. 13.8 V
B. 14.5 V
C. 14.1 V
D. 13.2 Vll
0.050 points of specific gravity below other cells = bad cell.
......answer.....When testing a wet-cell battery with a hydrometer, what
threshold is used to determine a bad cell?
1.260 - 1.285 (temperature dependent) ......answer.....When testing a wet-cell
battery with a hydrometer, what reading indicates a fully charged battery?
,2|Page
50% ......answer.....When testing a fully charged start battery for capacity
with a load tester, what % of CCA rating should be induced by the load to
test resulting voltage?
C. Between 150% and 200% ......answer.....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%
False. the battery charger case shall be tied to the engine negative
terminal/bus, along with the negative output terminal of the battery charger,
not at the battery charger case itself., ......answer.....T or F: A battery charger
case shall be tied to the DC negative output terminal at the battery charger.
,3|Page
In case of an internal short to the case, the AC grounding wire would not
carry enough current. ......answer.....Why do battery chargers require a
separate case connection to main AC grounding bus and Engine negative /
DC grounding bus?
No smaller than 1 size below the DC current carrying conductors between
the charger and batteries - provided OC protection on positive DC output is
no greater than 135% of DC grounding cable ampacity and conductor is no
smaller than 16 AWG. ......answer.....What is the minimal wire size required
for a battery charger case connection to DC ground/engine negative?
Class T fuse rated for appropriate AIC ......answer.....What device is typically
found to satisfy the required OC protection between a battery charger and
the batteries?
Batteries will feed back into solar array or wind generator coil and discharge
(possibly damage). Note: many voltage regulators have integral blocking
, 4|Page
diodes. ......answer.....What may happen to a solar array or wind generator
used to charge batteries without a blocking diode?
24 inches or more (unless waterproof!) ......answer.....How far above bilge
water level must a battery charger be mounted?
At least 24 inches ......answer.....How far away from a gasoline tank must a
pre-wired battery charger's AC connection plug be located?
False. (only when installed in location that required GFCI per ABYC E-11)
......answer.....T or F: All marine inverters shall utilize an internal or external
GFCI on their AC outlets.
False. Most are not ignition protected. ......answer.....T or F: most GFCI
outlets can be used in a gasoline engine room
