Exam (elaborations)
ABYC Electrical Questions and Answers Graded A+
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Exam of 5 pages for the course Abyc at Abyc (ABYC Electrical)
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ABYC Electricalhigher voltage increased capacity - answer2 or More batteries connected in series
provides_________, or in parallel to provide_________
hydrogen - answer Batteries gas of what
the engine negative terminal or the DC main negative bus - answer If an AC system is
installed the main AC system grounding bus shall be connected to what?
isolation transformer isolates all current crying AC system conductors and the AC
drowning conductor, Polarization transformers do not isolate the AC grounding
conductor. - answer Difference between an isolation transformer and polarization
transformer
800 100 - answerA 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
green white - answer with 120Volt systems, the _______ and ________ get tied
together at an AC power source, but only at a source of AC power.
the inverter is operating in AC production mode - answer Inverters are only tied together
when......
10 feet - answerA standard based issue states that in shore power systems overcorrect
protection be located no more than ______ from the point of inlet into the boat
Metal straps or clamps - answerAll AC cables from the shore power inlet to the main
shore power breakers shall be in conduit or supported by means of____________
neutrals - answerBoats with more than one shore power inlet should never connect
________ together from multiple inlets.
Galvanic isolator - answerWhat is the only device permitted to be installed in series with
the AC grounding conductor
6 - answerDurring an installation of an galvanic isolator conductors shall be supported
and/or clamped to relive strain within ______inches of isolator case
135 - answerThe galvanic isolator shall be provided with wiring terminals or wire leads
for connection, having an ampacity that is __________ percent of its nominal rating.
, step up or step down voltage from one side of the transformer to the other -
answerIsolation transformers offer engineers the ability to do what?
automatically deals with dock-side polarity issues - answerWhat does a polarization
transformer automatically do?
Ungrounded black grounded white - answerReverse polarity indicating devices shall
respond to the reversal of the ____________ and ________ conductors.
25,000 ohms - answerThe total impedance of polarity indicating and production devices
connected between normal current carrying conductors and the grounding conductor
shall not be less than __________
Ideal SureTest - answerOne tool used to confirm the integrity of electrical supply at the
dock is ________________
open neutral - answerIn Split 240/120V systems one cause for AC equipment to fail
depending on unbalanced legs is.....
check voltage, verify correct engine rpm, check all connections and wire termination
positions for integrity - answerIf there is low voltage at AC generator you should....
check frequency for normal range, if possible, adjust voltage regulator and verify correct
engine rpm and governor setting - answerif there is high voltage at AC generator you
should....
check slip rings they could be worn or burned - answerif there is erratic voltage at AC
generator you should....
check for cycling loads, If erratic with all loads off, check governor function - answerif
there is erratic frequency at AC generator you should.....
check the governor could be out of adjustment - answerif there is high frequency at AC
generator you should....
auxiliary set of windings called exciter windings - answerBrushless generators use what
megohmmeter - answerA device used to confirm the integrity of the winding insulation
inside generator or motor is called a
1 megohm or more - answerAn acceptable reading when using a megommeter to test
winding insulation is
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