ABYC MARINE ELECTRICAL D. Inter circuit Short
CERTIFICATION 2024 NEWEST
EXAM 110 QUESTIONS WITH
D. Heat - -----ANSWER---->The primary by-
DETAILED VERIFIED ANSWERS
product of excessive electrical resistance is:
(100% CORRECT ANSWERS) A+
GRADE ASSURED A. Increased Amperage
B. Increased Voltage
C. Reduced Ambient Temperature
Every 18 inches. - -----ANSWER---->How often D. Heat
(in inches) shall wire bundles be supported?
1 HP = 746 Watts - -----ANSWER---->One HP =
Insulated Metallic Hanger Clamps - ----- how many watts?
ANSWER---->What type of clamps are to be
used for supporting wire bundles when routed
over engines and machinery? D. TDR (time-domain reflectometer) - -----
ANSWER---->What is the preferred tool for
tracing shorted and open circuits?
40 lbs (E-11 Table XV) - -----ANSWER---->What A. Ohm meter
tensile force must a 10 Gauge crimp connector
withstand for one minute? B. Amp clamp
C. Volt meter
36 inches - -----ANSWER---->What is the max D. TDR (time-domain reflectometer)
allowed unsupported cable length for battery
cables?
0 AWG - -----ANSWER---->A technician is
installing a cable run from the batteries to the
True - -----ANSWER---->T or F: Running AC and main DC panel board on a boat as part of a refit.
DC conductors together is allowed so long as The boat has a 12-volt system and the distance
the AC conductors are sheathed. form the panel to the batteries is 15 ft. The
maximum current draw from the panel is
calculated at 90 amps. What guage cable should
C. Unwanted open - -----ANSWER---->The most be used (minimum)?
common electrical circuit problem in marine
applications is:
Yellow - -----ANSWER---->DC grounded
A. Short circuits conductors on new boats that are also equipped
B. Too much continuity with AC systems should use what color
insulated wire?
C. Unwanted open
,16 AWG - -----ANSWER---->What is the smallest Must be protected with dielectric insulating
guage wire allowed for unsheathed wire runs material - -----ANSWER---->What provision must
through the boat? be in place on any fuel line located within 12
inches of a battery terminals?
False. Start batteries have a greater number of
thinner plates within each cell. - -----ANSWER---- 80 F, 25 Amps, 10.5 Volts - -----ANSWER----
>T or F: Compared to deep cycle (house) >Define: Battery reserve capacity = the number
batteries, cranking batteries will have thicker of minutes that a new, fully charged battery at
lead plates to facilitate the higher, short- ______ degrees F can be continuously
duration current draws. discharged at ______ amps while maintaining
_____ volts (for a 12 v battery)
Cranking - -----ANSWER---->Which type of
battery generally recharges faster? Deep cycle 90 minutes - -----ANSWER---->According to
or cranking? ABYC, what is the minimum battery reserve
capacity?
Wire brush and backing soda. - -----ANSWER----
>What tool and common household staple are 32 degrees F, 30 seconds, 7.2V - -----ANSWER----
used to clean battery terminals? >Define: Marine Cranking Amps = the discharge
load, in amperes, that a new, fully-charged
battery at _____ degrees F can deliver for
Most of the sulfuric acid has been absorbed into ______ seconds while maintaining a voltage of
the lead plates, leaving mostly water in the _____ volts (for a 12 v battery).
electrolyte. - -----ANSWER---->Why might a
fully-discharged wet-cell type battery freeze?
0 degrees F, 30 seconds, 7.2V - -----ANSWER----
>Define: Cold Cranking Amps = the discharge
1 inch, 90 lbs or 2x the battery weight, for 1 load, in amperes, that a new, fully-charged
minute in each direction. - -----ANSWER---- battery at _____ degrees F can deliver for
>Batteries must be secured to prevent ______ seconds while maintaining a voltage of
movement of more than ______ inches in any _____ volts (for a 12 v battery).
direction when a pulling force of _____ or
_____, whichever is less, is applied through the
center of gravity of the battery for how long? 8 AWG - -----ANSWER---->What is the largest
guage wire that may be connected to a bettery
with wing-nuts?
True - -----ANSWER---->T or F: it is ok to install
batteries directly below an uninterrupted fuel
line? 800 CCA or 100 Ahr (exceptions: electronic
equipment with battery backed memories;
safety equipment such as bilge pumps, alarms,
CO detectors, bilge blowers; battery chargers;
,I'm pressed current systems. - -----ANSWER---- ANSWER---->What does "trip free" breaker
>Per ABYC E-10, a battery switch must be mean?
installed in the positive conductor from each
battery bank with a CCA rating greater than
____ (or greater than _____ Ah if CCA rating not C. 14.1 V - -----ANSWER---->The maximum
available). sustained charging voltage acceptable to some
gell cell battery manufacturers is:
A. 13.8 V
AIC = 5000 Amps (E-11 table IV-A) - -----
ANSWER---->What is the minimum ampere B. 14.5 V
interrupting capacity (AIC) for main overcurrent
protection on a battery bank rated at 12 V, 1500 C. 14.1 V
CCA? D. 13.2 Vll
AIC = 2X mnfg's short-circuit rating or 100X 0.050 points of specific gravity below other cells
nominal Ahr rating. - -----ANSWER---->What is = bad cell. - -----ANSWER---->When testing a
the minimum ampere interrupting capacity wet-cell battery with a hydrometer, what
(AIC) for main overcurrent protection on a threshold is used to determine a bad cell?
battery bank rated at more than 2200 CCA or
more than 500 Ahr?
1.260 - 1.285 (temperature dependent) - -----
ANSWER---->When testing a wet-cell battery
False. "Readily accessible" defines entry into the with a hydrometer, what reading indicates a
engine room in an emergency as dangerous - fully charged battery?
use a remote battery switch. - -----ANSWER----
>T or F: it is ok to mount a battery switch inside
an engine room, because ABYC startes that it 50% - -----ANSWER---->When testing a fully
must be located as close to the batteries as charged start battery for capacity with a load
practical. tester, what % of CCA rating should be induced
by the load to test resulting voltage?
Overcurrent protection must be located withing
7 inches of the power source unless contained C. Between 150% and 200% - -----ANSWER----
within a sheath, in which case it may be up to >Most engine-driven alternators are optimally
40 inches away. If the power source is a battery spun at what percentage of engine RPMs?
and the conductors are sheathed, OC may be up
to 72 inches away. - -----ANSWER---->Explain the A. Between 10% and 50%
"7-40-72" rule
B. Less than 10%
C. Between 150% and 200%
Resetting mechanism cannot overrid over
D. Greater than 200%
current interrupting mechanism. (Note: some
residential breakers are not trip free) - -----
, False. the battery charger case shall be tied to 24 inches or more (unless waterproof!) - -----
the engine negative terminal/bus, along with ANSWER---->How far above bilge water level
the negative output terminal of the battery must a battery charger be mounted?
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 least 24 inches - -----ANSWER---->How far
at the battery charger. away from a gasoline tank must a pre-wired
battery charger's AC connection plug be
located?
In case of an internal short to the case, the AC
grounding wire would not carry enough current.
- -----ANSWER---->Why do battery chargers False. (only when installed in location that
require a separate case connection to main AC required GFCI per ABYC E-11) - -----ANSWER----
grounding bus and Engine negative / DC >T or F: All marine inverters shall utilize an
grounding bus? internal or external GFCI on their AC outlets.
No smaller than 1 size below the DC current False. Most are not ignition protected. - -----
carrying conductors between the charger and ANSWER---->T or F: most GFCI outlets can be
batteries - provided OC protection on positive used in a gasoline engine room
DC output is no greater than 135% of DC
grounding cable ampacity and conductor is no
smaller than 16 AWG. - -----ANSWER---->What is False. Shore power neutral is tied to ground on
the minimal wire size required for a battery the shore side. - -----ANSWER---->T or F:
charger case connection to DC ground/engine Because the shore power connection is a power
negative? source, the neutral conductor should be tied to
ground at the point where it comes in to the
boat (shore power cable connection)
Class T fuse rated for appropriate AIC - -----
ANSWER---->What device is typically found to
satisfy the required OC protection between a Both. - -----ANSWER---->Tech A says that voltage
battery charger and the batteries? supplied to the rotor controls the alternator
output voltage. Tech B says that the alternator
output is proportional to the rotor voltage.
Batteries will feed back into solar array or wind Which is correct, A, B, Both or Neither?
generator coil and discharge (possibly damage).
Note: many voltage regulators have integral
blocking diodes. - -----ANSWER---->What may Tech A - -----ANSWER---->Tech A says that AC
happen to a solar array or wind generator used and DC are able to run together down the same
to charge batteries without a blocking diode? conductor. Tech B says this is technically
impossible. Which is correct, A, B, neither or
both?
CERTIFICATION 2024 NEWEST
EXAM 110 QUESTIONS WITH
D. Heat - -----ANSWER---->The primary by-
DETAILED VERIFIED ANSWERS
product of excessive electrical resistance is:
(100% CORRECT ANSWERS) A+
GRADE ASSURED A. Increased Amperage
B. Increased Voltage
C. Reduced Ambient Temperature
Every 18 inches. - -----ANSWER---->How often D. Heat
(in inches) shall wire bundles be supported?
1 HP = 746 Watts - -----ANSWER---->One HP =
Insulated Metallic Hanger Clamps - ----- how many watts?
ANSWER---->What type of clamps are to be
used for supporting wire bundles when routed
over engines and machinery? D. TDR (time-domain reflectometer) - -----
ANSWER---->What is the preferred tool for
tracing shorted and open circuits?
40 lbs (E-11 Table XV) - -----ANSWER---->What A. Ohm meter
tensile force must a 10 Gauge crimp connector
withstand for one minute? B. Amp clamp
C. Volt meter
36 inches - -----ANSWER---->What is the max D. TDR (time-domain reflectometer)
allowed unsupported cable length for battery
cables?
0 AWG - -----ANSWER---->A technician is
installing a cable run from the batteries to the
True - -----ANSWER---->T or F: Running AC and main DC panel board on a boat as part of a refit.
DC conductors together is allowed so long as The boat has a 12-volt system and the distance
the AC conductors are sheathed. form the panel to the batteries is 15 ft. The
maximum current draw from the panel is
calculated at 90 amps. What guage cable should
C. Unwanted open - -----ANSWER---->The most be used (minimum)?
common electrical circuit problem in marine
applications is:
Yellow - -----ANSWER---->DC grounded
A. Short circuits conductors on new boats that are also equipped
B. Too much continuity with AC systems should use what color
insulated wire?
C. Unwanted open
,16 AWG - -----ANSWER---->What is the smallest Must be protected with dielectric insulating
guage wire allowed for unsheathed wire runs material - -----ANSWER---->What provision must
through the boat? be in place on any fuel line located within 12
inches of a battery terminals?
False. Start batteries have a greater number of
thinner plates within each cell. - -----ANSWER---- 80 F, 25 Amps, 10.5 Volts - -----ANSWER----
>T or F: Compared to deep cycle (house) >Define: Battery reserve capacity = the number
batteries, cranking batteries will have thicker of minutes that a new, fully charged battery at
lead plates to facilitate the higher, short- ______ degrees F can be continuously
duration current draws. discharged at ______ amps while maintaining
_____ volts (for a 12 v battery)
Cranking - -----ANSWER---->Which type of
battery generally recharges faster? Deep cycle 90 minutes - -----ANSWER---->According to
or cranking? ABYC, what is the minimum battery reserve
capacity?
Wire brush and backing soda. - -----ANSWER----
>What tool and common household staple are 32 degrees F, 30 seconds, 7.2V - -----ANSWER----
used to clean battery terminals? >Define: Marine Cranking Amps = the discharge
load, in amperes, that a new, fully-charged
battery at _____ degrees F can deliver for
Most of the sulfuric acid has been absorbed into ______ seconds while maintaining a voltage of
the lead plates, leaving mostly water in the _____ volts (for a 12 v battery).
electrolyte. - -----ANSWER---->Why might a
fully-discharged wet-cell type battery freeze?
0 degrees F, 30 seconds, 7.2V - -----ANSWER----
>Define: Cold Cranking Amps = the discharge
1 inch, 90 lbs or 2x the battery weight, for 1 load, in amperes, that a new, fully-charged
minute in each direction. - -----ANSWER---- battery at _____ degrees F can deliver for
>Batteries must be secured to prevent ______ seconds while maintaining a voltage of
movement of more than ______ inches in any _____ volts (for a 12 v battery).
direction when a pulling force of _____ or
_____, whichever is less, is applied through the
center of gravity of the battery for how long? 8 AWG - -----ANSWER---->What is the largest
guage wire that may be connected to a bettery
with wing-nuts?
True - -----ANSWER---->T or F: it is ok to install
batteries directly below an uninterrupted fuel
line? 800 CCA or 100 Ahr (exceptions: electronic
equipment with battery backed memories;
safety equipment such as bilge pumps, alarms,
CO detectors, bilge blowers; battery chargers;
,I'm pressed current systems. - -----ANSWER---- ANSWER---->What does "trip free" breaker
>Per ABYC E-10, a battery switch must be mean?
installed in the positive conductor from each
battery bank with a CCA rating greater than
____ (or greater than _____ Ah if CCA rating not C. 14.1 V - -----ANSWER---->The maximum
available). sustained charging voltage acceptable to some
gell cell battery manufacturers is:
A. 13.8 V
AIC = 5000 Amps (E-11 table IV-A) - -----
ANSWER---->What is the minimum ampere B. 14.5 V
interrupting capacity (AIC) for main overcurrent
protection on a battery bank rated at 12 V, 1500 C. 14.1 V
CCA? D. 13.2 Vll
AIC = 2X mnfg's short-circuit rating or 100X 0.050 points of specific gravity below other cells
nominal Ahr rating. - -----ANSWER---->What is = bad cell. - -----ANSWER---->When testing a
the minimum ampere interrupting capacity wet-cell battery with a hydrometer, what
(AIC) for main overcurrent protection on a threshold is used to determine a bad cell?
battery bank rated at more than 2200 CCA or
more than 500 Ahr?
1.260 - 1.285 (temperature dependent) - -----
ANSWER---->When testing a wet-cell battery
False. "Readily accessible" defines entry into the with a hydrometer, what reading indicates a
engine room in an emergency as dangerous - fully charged battery?
use a remote battery switch. - -----ANSWER----
>T or F: it is ok to mount a battery switch inside
an engine room, because ABYC startes that it 50% - -----ANSWER---->When testing a fully
must be located as close to the batteries as charged start battery for capacity with a load
practical. tester, what % of CCA rating should be induced
by the load to test resulting voltage?
Overcurrent protection must be located withing
7 inches of the power source unless contained C. Between 150% and 200% - -----ANSWER----
within a sheath, in which case it may be up to >Most engine-driven alternators are optimally
40 inches away. If the power source is a battery spun at what percentage of engine RPMs?
and the conductors are sheathed, OC may be up
to 72 inches away. - -----ANSWER---->Explain the A. Between 10% and 50%
"7-40-72" rule
B. Less than 10%
C. Between 150% and 200%
Resetting mechanism cannot overrid over
D. Greater than 200%
current interrupting mechanism. (Note: some
residential breakers are not trip free) - -----
, False. the battery charger case shall be tied to 24 inches or more (unless waterproof!) - -----
the engine negative terminal/bus, along with ANSWER---->How far above bilge water level
the negative output terminal of the battery must a battery charger be mounted?
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 least 24 inches - -----ANSWER---->How far
at the battery charger. away from a gasoline tank must a pre-wired
battery charger's AC connection plug be
located?
In case of an internal short to the case, the AC
grounding wire would not carry enough current.
- -----ANSWER---->Why do battery chargers False. (only when installed in location that
require a separate case connection to main AC required GFCI per ABYC E-11) - -----ANSWER----
grounding bus and Engine negative / DC >T or F: All marine inverters shall utilize an
grounding bus? internal or external GFCI on their AC outlets.
No smaller than 1 size below the DC current False. Most are not ignition protected. - -----
carrying conductors between the charger and ANSWER---->T or F: most GFCI outlets can be
batteries - provided OC protection on positive used in a gasoline engine room
DC output is no greater than 135% of DC
grounding cable ampacity and conductor is no
smaller than 16 AWG. - -----ANSWER---->What is False. Shore power neutral is tied to ground on
the minimal wire size required for a battery the shore side. - -----ANSWER---->T or F:
charger case connection to DC ground/engine Because the shore power connection is a power
negative? source, the neutral conductor should be tied to
ground at the point where it comes in to the
boat (shore power cable connection)
Class T fuse rated for appropriate AIC - -----
ANSWER---->What device is typically found to
satisfy the required OC protection between a Both. - -----ANSWER---->Tech A says that voltage
battery charger and the batteries? supplied to the rotor controls the alternator
output voltage. Tech B says that the alternator
output is proportional to the rotor voltage.
Batteries will feed back into solar array or wind Which is correct, A, B, Both or Neither?
generator coil and discharge (possibly damage).
Note: many voltage regulators have integral
blocking diodes. - -----ANSWER---->What may Tech A - -----ANSWER---->Tech A says that AC
happen to a solar array or wind generator used and DC are able to run together down the same
to charge batteries without a blocking diode? conductor. Tech B says this is technically
impossible. Which is correct, A, B, neither or
both?
