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Exam (elaborations)

ABYC MARINE ELECTRICAL QUIZZES & ANS!!

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  • ABYC MARINE ELECTRICAL
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  • ABYC MARINE ELECTRICAL

ABYC MARINE ELECTRICAL QUIZZES & ANS!!

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  • May 10, 2024
  • 64
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
  • ABYC MARINE ELECTRICAL
  • ABYC MARINE ELECTRICAL
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ABYC MARINE ELECTRICAL QUIZZES & ANS!!

How often (in inches) shall wire bundles be supported? ✔✔Every 18 inches.


What type of clamps are to be used for supporting wire bundles when routed over
engines and machinery? ✔✔Insulated Metallic Hanger Clamps


What tensile force must a 10 Gauge crimp connector withstand for one minute?
✔✔40 lbs (E-11 Table XV)


What is the max allowed unsupported cable length for battery cables? ✔✔36
inches


T or F: Running AC and DC conductors together is allowed so long as the AC
conductors are sheathed. ✔✔True


The most common electrical circuit problem in marine applications is:
A. Short circuits
B. Too much continuity
C. Unwanted open

D. Inter circuit Short ✔✔C. Unwanted open


The primary by-product of excessive electrical resistance is:
A. Increased Amperage
B. Increased Voltage

,C. Reduced Ambient Temperature

D. Heat ✔✔D. Heat


One HP = how many watts? ✔✔1 HP = 746 Watts


What is the preferred tool for tracing shorted and open circuits?
A. Ohm meter
B. Amp clamp
C. Volt meter

D. TDR (time-domain reflectometer) ✔✔D. TDR (time-domain reflectometer)


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)? ✔✔0
AWG


DC grounded conductors on new boats that are also equipped with AC systems
should use what color insulated wire? ✔✔Yellow


What is the smallest guage wire allowed for unsheathed wire runs through the
boat? ✔✔16 AWG


T or F: Compared to deep cycle (house) batteries, cranking batteries will have
thicker lead plates to facilitate the higher, short-duration current draws.
✔✔False. Start batteries have a greater number of thinner plates within each cell.

,Which type of battery generally recharges faster? Deep cycle or cranking?
✔✔Cranking


What tool and common household staple are used to clean battery terminals?
✔✔Wire brush and backing soda.


Why might a fully-discharged wet-cell type battery freeze? ✔✔Most of the
sulfuric acid has been absorbed into the lead plates, leaving mostly water in the
electrolyte.


Batteries must 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? ✔✔1 inch, 90 lbs or
2x the battery weight, for 1 minute in each direction.


T or F: it is ok to install batteries directly below an uninterrupted fuel line?
✔✔True


What provision must be in place on any fuel line located within 12 inches of a
battery terminals? ✔✔Must be protected with dielectric insulating material


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) ✔✔80 F, 25 Amps, 10.5 Volts

, According to ABYC, what is the minimum battery reserve capacity? ✔✔90
minutes


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). ✔✔32 degrees F, 30
seconds, 7.2V


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). ✔✔0 degrees F, 30
seconds, 7.2V


What is the largest guage wire that may be connected to a bettery with wing-
nuts? ✔✔8 AWG


Per ABYC E-10, a battery switch must 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). ✔✔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.


What is the minimum ampere interrupting capacity (AIC) for main overcurrent
protection on a battery bank rated at 12 V, 1500 CCA? ✔✔AIC = 5000 Amps (E-
11 table IV-A)

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