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ABYC Marine Electrical Certification Exam Review
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ABYC Marine Electrical Certification Exam Review
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A 120V hot water heater is rated at 1750 watts. How much current does it use:
a. 12.5 Amps
b. 12.5 Ohms
c. 14.6 Amps
d. 14.6 Volts
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c. 14.6 Amps (not Volts!!)
,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?
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AIC = 2X mnfg's short-circuit rating or 100X nominal Ahr rating.
An "open Neutral" conductor in a 240V/120V shore power system will most likely show
up as:
A. Nuisance tripping of the AC main breaker
B. Nuisance tripping of an appliance branch circuit breaker
C. A loud humming noise emitted from the TV
D. Burned out 120V appliance
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D. Burned out 120V appliance
The nominal trip rate for GFCI receptacles in the US is:
a. 5 mA
b. 10 mA
c. 15 mA
d. 30 mA
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a. 5 mA
,T or F: Generators that are "self-limiting" do not require overcurrent protection if the
conductors used are of sufficient ampacity and sized for maximum current available.
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True (provided the generator's self-limiting current, AKA "overload
current", does not exceed 120% of it's rated current output)
A customer has a 600 Ah 'house' battery bank and wants to recharge with the highest
amperage (standard flooded batteries are being used). How high amperage is
reasonable?
a. 200 amps
b. 150 amps
c. 100 amps
d. 50 amps
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b. 150 amps (25% of capacity)
According to ABYC, maximum current carrying capacity of a 10 gauge wire, 105
degree C insulation, inside the engine room
when bundled with 2 other current carrying wires would be?
a. 60 amps
b. 51 amps
c. 42 amps
d. 35.7 amps
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, d. 35.7 amps
Which type of battery generally recharges faster? Deep cycle or cranking?
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Cranking
What is the expected voltage across a 'closed' switch that is operating properly
a. It should read current battery voltage
b. It can be up to 10% less than battery voltage
c. It should read '0' VDC
d. Not enough information provided
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c. It should read '0' VDC
The minimum amp circuit breaker that should be used to protect a 120VAC water
heater with a 1600 watt element would be rated at ________ amps.
a. 15
b. 10
c. 30
d. 20
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