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ABYC ELECTRICAL STUDY 1 EXAM QUESTIONS AND ANSWERS
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ABYC ELECTRICAL STUDY 1 EXAM QUESTIONS AND ANSWERS
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ABYC ELECTRICAL STUDY 1 EXAMQUESTIONS AND ANSWERS
the reverse polarity indicator is an LED with 2 legs. One of these legs have a resistor of
- Answers -25k Ohms
Anodes used in cathodic protection systems shall be - Answers -painted with a
protective barrier coating
oil pressure and temperature gauges are - Answers -installed in series
what type of element are in series - Answers -the switches
voltage regulator ( inbetween output and breaker) - Answers -controls alternator field
voltage
isolator transformer - Answers -cleans signal
how much is the increase in torque for the capacitor - Answers -250%
RPM modify - Answers -from the govner
commutator - Answers -a slip ring that serves to reverse the direction in which an
electrical current flows from the generator
armature - Answers -the iron the coil goes on
excitation (ac alternator generators) - Answers -on the rotor
voltage - Answers -difference in potiental
for sailboats the top of the lighting rod should be - Answers -6in above everything else
on the mast and filed to a sharp point
independent breaker to - Answers -activate inverter
ohm meter reads - Answers -amps AC only
single phase - Answers -needs netural
, ground fault - Answers -if electricity leaks from intended paths in these 2 wires ( ac hot
and neutral)
battery isolator - Answers -charge batteries with 1 alternator
galvanic isolator - Answers -blocks bad DC currents
only at the source of power - Answers -the neutral and ground should be connected
the minimum amp circuit breaker that should be used to protect a 120v water heater
circuit with a 1600-watt element would be rated at________amps. - Answers -15
when testing for excessive EMF emission near a conductor or appliance, the tool of
choice - Answers -gauss meter
the primary problem with using a series circuit to supply multiple loads is - Answers -
voltage drop through the circuit will be excessive
based on this section, the most common electrical circuit problem in marine applications
is - Answers -unwanted open
the primary by-product of excessive electrical resistance is - Answers -heat
one horsepower equals - Answers -746 watts
excessive electrical resistance can be caused by - Answers -undersized wires,loose
connections and corrosion
gauss meter - Answers -helps detect sources of magnetic interference that affect
electronic compasses,autopliots and others
an intercircuit short circuit - Answers -is one which unwanted conductors , such as an
errant screw, completes a circuit in ways it wasn't designed to be connected
time-domain reflectometer - Answers -can pinpoint the location of short circuts and open
circuits
BASED ON ABYC STANDARDS, A 1,000 WATT 120VAC WATER HEATER, WHOSE
SUPPLY CABLE HAS 105C THERMAL RATING, IS RUN OUTSIDE OF THE ENGINE
ROOM AND IS NOT BUNDLED WITH ANY OTHER CONDUCTORS. WHAT MINIMUM
SIZE WIRE GAUGE WILL BE REQUIRED TO SERVICE THIS CIRCUIT? - Answers -
16 gauge
WHICH OF THE FOLLOWING COMPONENTS DOES NOT REQUIRE
OVERCURRENT PROTECTION? - Answers -STARTER MOTOR
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