ABYC ELECTRICAL STUDY 1 UPDATED
Questions and CORRECT Answers
the reverse polarity indicator is an LED with 2 legs. One of these legs have a resistor of -
CORRECT ANSWER - 25k Ohms
Anodes used in cathodic protection systems shall be - CORRECT ANSWER - painted
with a protective barrier coating
oil pressure and temperature gauges are - CORRECT ANSWER - installed in series
what type of element are in series - CORRECT ANSWER - the switches
voltage regulator ( inbetween output and breaker) - CORRECT ANSWER - controls
alternator field voltage
isolator transformer - CORRECT ANSWER - cleans signal
how much is the increase in torque for the capacitor - CORRECT ANSWER - 250%
RPM modify - CORRECT ANSWER - from the govner
commutator - CORRECT ANSWER - a slip ring that serves to reverse the direction in
which an electrical current flows from the generator
armature - CORRECT ANSWER - the iron the coil goes on
excitation (ac alternator generators) - CORRECT ANSWER - on the rotor
,voltage - CORRECT ANSWER - difference in potiental
for sailboats the top of the lighting rod should be - CORRECT ANSWER - 6in above
everything else on the mast and filed to a sharp point
independent breaker to - CORRECT ANSWER - activate inverter
ohm meter reads - CORRECT ANSWER - amps AC only
single phase - CORRECT ANSWER - needs netural
ground fault - CORRECT ANSWER - if electricity leaks from intended paths in these 2
wires ( ac hot and neutral)
battery isolator - CORRECT ANSWER - charge batteries with 1 alternator
galvanic isolator - CORRECT ANSWER - blocks bad DC currents
only at the source of power - CORRECT ANSWER - 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. - CORRECT ANSWER - 15
when testing for excessive EMF emission near a conductor or appliance, the tool of choice -
CORRECT ANSWER - gauss meter
, the primary problem with using a series circuit to supply multiple loads is - CORRECT
ANSWER - voltage drop through the circuit will be excessive
based on this section, the most common electrical circuit problem in marine applications is -
CORRECT ANSWER - unwanted open
the primary by-product of excessive electrical resistance is - CORRECT ANSWER - heat
one horsepower equals - CORRECT ANSWER - 746 watts
excessive electrical resistance can be caused by - CORRECT ANSWER - undersized
wires,loose connections and corrosion
gauss meter - CORRECT ANSWER - helps detect sources of magnetic interference that
affect electronic compasses,autopliots and others
an intercircuit short circuit - CORRECT ANSWER - 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 - CORRECT ANSWER - 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? - CORRECT
ANSWER - 16 gauge
WHICH OF THE FOLLOWING COMPONENTS DOES NOT REQUIRE OVERCURRENT
PROTECTION? - CORRECT ANSWER - STARTER MOTOR
Questions and CORRECT Answers
the reverse polarity indicator is an LED with 2 legs. One of these legs have a resistor of -
CORRECT ANSWER - 25k Ohms
Anodes used in cathodic protection systems shall be - CORRECT ANSWER - painted
with a protective barrier coating
oil pressure and temperature gauges are - CORRECT ANSWER - installed in series
what type of element are in series - CORRECT ANSWER - the switches
voltage regulator ( inbetween output and breaker) - CORRECT ANSWER - controls
alternator field voltage
isolator transformer - CORRECT ANSWER - cleans signal
how much is the increase in torque for the capacitor - CORRECT ANSWER - 250%
RPM modify - CORRECT ANSWER - from the govner
commutator - CORRECT ANSWER - a slip ring that serves to reverse the direction in
which an electrical current flows from the generator
armature - CORRECT ANSWER - the iron the coil goes on
excitation (ac alternator generators) - CORRECT ANSWER - on the rotor
,voltage - CORRECT ANSWER - difference in potiental
for sailboats the top of the lighting rod should be - CORRECT ANSWER - 6in above
everything else on the mast and filed to a sharp point
independent breaker to - CORRECT ANSWER - activate inverter
ohm meter reads - CORRECT ANSWER - amps AC only
single phase - CORRECT ANSWER - needs netural
ground fault - CORRECT ANSWER - if electricity leaks from intended paths in these 2
wires ( ac hot and neutral)
battery isolator - CORRECT ANSWER - charge batteries with 1 alternator
galvanic isolator - CORRECT ANSWER - blocks bad DC currents
only at the source of power - CORRECT ANSWER - 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. - CORRECT ANSWER - 15
when testing for excessive EMF emission near a conductor or appliance, the tool of choice -
CORRECT ANSWER - gauss meter
, the primary problem with using a series circuit to supply multiple loads is - CORRECT
ANSWER - voltage drop through the circuit will be excessive
based on this section, the most common electrical circuit problem in marine applications is -
CORRECT ANSWER - unwanted open
the primary by-product of excessive electrical resistance is - CORRECT ANSWER - heat
one horsepower equals - CORRECT ANSWER - 746 watts
excessive electrical resistance can be caused by - CORRECT ANSWER - undersized
wires,loose connections and corrosion
gauss meter - CORRECT ANSWER - helps detect sources of magnetic interference that
affect electronic compasses,autopliots and others
an intercircuit short circuit - CORRECT ANSWER - 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 - CORRECT ANSWER - 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? - CORRECT
ANSWER - 16 gauge
WHICH OF THE FOLLOWING COMPONENTS DOES NOT REQUIRE OVERCURRENT
PROTECTION? - CORRECT ANSWER - STARTER MOTOR
