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ABYC Marine Electrical Certification Exam Review Questions And Answers
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ABYC Marine Electrical Certification Exam Review Questions And Answers...
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ABYC Marine Electrical Certification Exam ReviewQuestions And Answers
Every 18 inches. - Answer How often (in inches) shall wire bundles be supported?
Insulated Metallic Hanger Clamps - Answer What type of clamps are to be used for
supporting wire bundles when routed over engines and machinery?
40 lbs (E-11 Table XV) - Answer What tensile force must a 10 Gauge crimp connector
withstand for one minute?
36 inches - Answer What is the max allowed unsupported cable length for battery
cables?
True - Answer T or F: Running AC and DC conductors together is allowed so long as the
AC conductors are sheathed.
C. Unwanted open - Answer The most common electrical circuit problem in marine
applications is:
A. Short circuits
B. Too much continuity
C. Unwanted open
D. Inter circuit Short
D. Heat - Answer The major by-product of too much electrical resistance is:
A. Increased Amperage
B. Increased Voltage
,C. Lessened Ambient Temperature
D. Heat
1 HP = 746 Watts - Answer One HP = what wattage?
1 HP = 746 Watts
1 HP = what wattage?
D. TDR (time-domain reflectometer) - Answer What is the best tool for tracing shorted
and open circuits?
A. Ohm meter
B. Amp clamp
C. Volt meter
D. TDR (time-domain reflectometer)
0 AWG - Answer A technician is installing a cable run from the batteries to the main DC
panel board on a boat as part of a refit. The boat has a 12-volt system and the distance
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 be used (minimum)?
Yellow - DC grounded conductors on new boats that are also equipped with AC systems
should utilize what color of insulated wire?
16 AWG - What is the smallest guage wire allowed for unsheathed wire runs through the
boat?
False. Cranking batteries have more thinner plates in each cell. - Answer T or F: The
lead plates will be thicker in cranking batteries than in deep cycle (house) batteries to
accommodate the higher, short-duration current draws.
Cranking - Answer Which type of battery would normally be quicker to recharge? Deep
cycle or cranking?
,Wire brush and backing soda. - Answer What tool and common household staple are
utilized in cleaning battery terminals?
Most of the sulphuric acid has been absorbed into the lead plates, leaving mostly water
in the electrolyte. - Answer Why might a fully-discharged wet-cell type battery freeze?
1 inch, 90 lbs or 2x the battery weight, for 1 minute in each direction. - Answer Batteries
shall be secured to prevent movement of more than ______ inches in any direction when
a pulling force of _____ or _____, whichever is less, is applied through the center of
gravity of the battery for how long?
True - Answer T or F: it is ok to mount batteries directly below an uninterrupted fuel line?
Must be shielded with dielectric insulating material - Answer What provision must be on
any fuel line that is within 12 inches of a battery terminals?
80 F, 25 Amps, 10.5 Volts - Answer Define: Battery reserve capacity = the number of
minutes that a new, fully charged battery at ______ degrees F can be continuously
discharged at ______ amps while maintaining _____ volts (for a 12 v battery)
90 minutes - Answer According to ABYC, what is the minimum battery reserve capacity?
32 degrees F, 30 seconds, 7.2V - Answer Define: Marine Cranking Amps = the discharge
load, in amperes, that a new, fully-charged battery at _____ degrees F can deliver for
______ seconds while maintaining a voltage of _____ volts (for a 12 v battery).
0 degrees F, 30 seconds, 7.2V - Answer Define: Cold Cranking Amps = the discharge
load, in amperes, that a new, fully-charged battery at _____ degrees F can deliver for
______ seconds while maintaining a voltage of _____ volts (for a 12 v battery).
8 AWG - Answer What is the largest guage wire that may be connected to a bettery with
, wing-nuts?
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 Per ABYC E-10, a battery switch shall
be installed in the positive conductor from each battery bank with a CCA rating greater
than ____ (or greater than _____ Ah if CCA rating not available).
AIC = 5000 Amps (E-11 table IV-A) - Solution What is the minimum ampere interrupting
capacity (AIC) for main overcurrent protection on a battery bank rated at 12 V, 1500
CCA?
AIC = 2X mnfg's short-circuit rating or 100X nominal Ahr rating. - Answer What is the
minimum ampere interrupting capacity (AIC) for main overcurrent protection on a
battery bank rated at more than 2200 CCA or more than 500 Ahr?
False. "Readily accessible" defines entry into the engine room in an emergency as
dangerous - 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 must be located as close to
the batteries as practical.
The OC shall be installed within 7 inches of the power source if not contained within a
sheath. If it is contained within a sheath, it can be up to 40 inches away. If power source
is a battery and conductors are sheathed, OC can be up to 72 inches away. - Answer
Explain the "7-40-72" rule
Resetting mechanism cannot over-ride over current interrupting mechanism. (Note:
some residential breakers are not trip free) - Answer What does "trip free" breaker
mean?
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
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