ABYC Electrical Exam Questions
with 100% Correct Answers
What does a polarization transformer automatically do? - Answer-automatically deals
with dock-side polarity issues
Reverse polarity indicating devices shall respond to the reversal of the ____________
and ________ conductors. - Answer-Ungrounded black grounded white
The total impedance of polarity indicating and production devices connected between
normal current carrying conductors and the grounding conductor shall not be less than
__________ - Answer-25,000 ohms
One tool used to confirm the integrity of electrical supply at the dock is
________________ - Answer-Ideal SureTest
In Split 240/120V systems one cause for AC equipment to fail depending on unbalanced
legs is..... - Answer-open neutral
If there is low voltage at AC generator you should.... - Answer-check voltage, verify
correct engine rpm, check all connections and wire termination positions for integrity
if there is high voltage at AC generator you should.... - Answer-check frequency for
normal range, if possible, adjust voltage regulator and verify correct engine rpm and
governor setting
if there is erratic voltage at AC generator you should.... - Answer-check slip rings they
could be worn or burned
if there is erratic frequency at AC generator you should..... - Answer-check for cycling
loads, If erratic with all loads off, check governor function
if there is high frequency at AC generator you should.... - Answer-check the governor
could be out of adjustment
Brushless generators use what - Answer-auxiliary set of windings called exciter
windings
A device used to confirm the integrity of the winding insulation inside generator or motor
is called a - Answer-megohmmeter
, An acceptable reading when using a megommeter to test winding insulation is -
Answer-1 megohm or more
Where AC and DC conductors are run together or installed in the same terminal box or
enclosure the DC conductors shall have a minimum insulation voltage of... - Answer-
600volts
2 or More batteries connected in series provides_________, or in parallel to
provide_________ - Answer-higher voltage increased capacity
Batteries gas of what - Answer-hydrogen
If an AC system is installed the main AC system grounding bus shall be connected to
what? - Answer-the engine negative terminal or the DC main negative bus
Difference between an isolation transformer and polarization transformer - Answer-
isolation transformer isolates all current crying AC system conductors and the AC
drowning conductor, Polarization transformers do not isolate the AC grounding
conductor.
A battery switch shall be installed in the positive conductors from each battery or battery
bank with a CCA rating greater than _____amperes or _____Ah if CCA is unavailable -
Answer-800 100
with 120Volt systems, the _______ and ________ get tied together at an AC power
source, but only at a source of AC power. - Answer-green white
Inverters are only tied together when...... - Answer-the inverter is operating in AC
production mode
A standard based issue states that in shore power systems overcorrect protection be
located no more than ______ from the point of inlet into the boat - Answer-10 feet
All AC cables from the shore power inlet to the main shore power breakers shall be in
conduit or supported by means of____________ - Answer-Metal straps or clamps
Boats with more than one shore power inlet should never connect ________ together
from multiple inlets. - Answer-neutrals
What is the only device permitted to be installed in series with the AC grounding
conductor - Answer-Galvanic isolator
Durring an installation of an galvanic isolator conductors shall be supported and/or
clamped to relive strain within ______inches of isolator case - Answer-6
with 100% Correct Answers
What does a polarization transformer automatically do? - Answer-automatically deals
with dock-side polarity issues
Reverse polarity indicating devices shall respond to the reversal of the ____________
and ________ conductors. - Answer-Ungrounded black grounded white
The total impedance of polarity indicating and production devices connected between
normal current carrying conductors and the grounding conductor shall not be less than
__________ - Answer-25,000 ohms
One tool used to confirm the integrity of electrical supply at the dock is
________________ - Answer-Ideal SureTest
In Split 240/120V systems one cause for AC equipment to fail depending on unbalanced
legs is..... - Answer-open neutral
If there is low voltage at AC generator you should.... - Answer-check voltage, verify
correct engine rpm, check all connections and wire termination positions for integrity
if there is high voltage at AC generator you should.... - Answer-check frequency for
normal range, if possible, adjust voltage regulator and verify correct engine rpm and
governor setting
if there is erratic voltage at AC generator you should.... - Answer-check slip rings they
could be worn or burned
if there is erratic frequency at AC generator you should..... - Answer-check for cycling
loads, If erratic with all loads off, check governor function
if there is high frequency at AC generator you should.... - Answer-check the governor
could be out of adjustment
Brushless generators use what - Answer-auxiliary set of windings called exciter
windings
A device used to confirm the integrity of the winding insulation inside generator or motor
is called a - Answer-megohmmeter
, An acceptable reading when using a megommeter to test winding insulation is -
Answer-1 megohm or more
Where AC and DC conductors are run together or installed in the same terminal box or
enclosure the DC conductors shall have a minimum insulation voltage of... - Answer-
600volts
2 or More batteries connected in series provides_________, or in parallel to
provide_________ - Answer-higher voltage increased capacity
Batteries gas of what - Answer-hydrogen
If an AC system is installed the main AC system grounding bus shall be connected to
what? - Answer-the engine negative terminal or the DC main negative bus
Difference between an isolation transformer and polarization transformer - Answer-
isolation transformer isolates all current crying AC system conductors and the AC
drowning conductor, Polarization transformers do not isolate the AC grounding
conductor.
A battery switch shall be installed in the positive conductors from each battery or battery
bank with a CCA rating greater than _____amperes or _____Ah if CCA is unavailable -
Answer-800 100
with 120Volt systems, the _______ and ________ get tied together at an AC power
source, but only at a source of AC power. - Answer-green white
Inverters are only tied together when...... - Answer-the inverter is operating in AC
production mode
A standard based issue states that in shore power systems overcorrect protection be
located no more than ______ from the point of inlet into the boat - Answer-10 feet
All AC cables from the shore power inlet to the main shore power breakers shall be in
conduit or supported by means of____________ - Answer-Metal straps or clamps
Boats with more than one shore power inlet should never connect ________ together
from multiple inlets. - Answer-neutrals
What is the only device permitted to be installed in series with the AC grounding
conductor - Answer-Galvanic isolator
Durring an installation of an galvanic isolator conductors shall be supported and/or
clamped to relive strain within ______inches of isolator case - Answer-6
