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ABYC, Electrical Exam - Study Guide Questions and Answers
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ABYC, Electrical Exam - Study Guide Questions and Answers
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ABYC, Electrical Exam - Study GuideQuestions and Answers
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 amps
When testing for excessive EMF emission near a conductor or appliance, the tool of
choice is a(n) ____________ - Answers -Gauss Meter
Thr primary problem with using a series circuit to supply multiple loads is that? -
Answers -Voltage drop through the circuit will be excessive
The most common electrical circuit problem in marine applications is a(n)
____________ - Answers -unwanted open
The primary by-product of excessive electrical resistance is ___________ - Answers -
heat
One horsepower is equal to ________ watts - Answers -746
Excessive electrical resistance can be caused by? - Answers -undersized wire, loose
connections, and corrosion
The tool of choice for tracing shorted and open circuits is the ________. - Answers -
TDR (Time Domain Reflectometer)
What material is recommended for clamping conductors over egines and moving
machinery? - Answers -Metal (w/ insulated inserts)
What is the acceptable minimum clearance for routing wire near a DRY exhaust
section? - Answers -9in (225mm)
The maximum number of terminals allowed to be attached to any one terminal stud is
______. - Answers -4
How much current should flow through the DC grounding conductor in a 25 amp DC
motor circuit? - Answers -0 amps (grounding conductor)
Where the ampacity of each individual conductor is sufficient to carry the entire load
current shared by the parallel conductors, the allowable size (and larger) is ____awg for
connecting parallel conductors. - Answers -8
, Running a cable to a DC panelboard (3% VD), 15' from the batteries (30' circuit), 12V
system with a max current of 90 amps. What is the cable gauge for this run? - Answers
-0 AWG
DC grounded conductors on new boats that are also equipped with AC systems should
use __________ colored insulation. - Answers -yellow
The maximum spacing for cable run support is _____ - Answers -18 in (450mm)
The smallest wire gauge cable allowed for unsheathed wire runs through the boat is
___. - Answers -16 AWG
What degree F above ambient temperature indicates a "hot spot" in general. - Answers
-25F
Up to how many volts is considered acceptable with a neutral to ground leakage test? -
Answers -2V
What % voltage swing is considered normal with AC nominal voltage? - Answers -+/-
10%
How much simulated theoretical voltage drop is considered too much with a 15A load? -
Answers -15.5%
According to the ABYC, the shore-power grounded conductor should: - Answers -B. Not
be grounded onboard the boat
If a customer complains about receiving shocks from his/her boat when the boat is
plugged into shore power, the first test should be a: - Answers -A. polarity check of the
shore cord
If a customer complains of low voltage at the AC panel, the technician should first: -
Answers -B. check voltage at the dock pedestal
A costomer complains about a reverse polarity problem. All of the following are likely
causes except: - Answers -C. an open neutral
In a galvanic isolator installation, which of the following could cause a loss of galvanic
isolation? - Answers -D. all of the above
Tech A says that a generators neutral and ground must be tied together when the
generator is supplying AC power. Tech B says they must always be kept isolated.
Which tech is correct? - Answers -A. tech A
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