IYRS Electrical ABYC Exam Questions 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 - Answer-15
/.When testing for excessive EMF emission near a conductor or appliance, the to...
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 - Answer-15
/.When testing for excessive EMF emission near a conductor or appliance, the tool of
choice is a - Answer-Gauss Meter
/.The primary problem with using a series circuit to supply multiple loads is that -
Answer-voltage drop across each load will be excessive
/.the most common electrical circuit problem in marine applications is - Answer-
unwanted open
/.the primary by-product of excessive electrical resistance is - Answer-heat
/.the tool of choice today for tracing shorted and open circuits is the: - Answer-TDR
/.What material is recommended for clamping conductors over engines and moving
machinery according to the ABYC - Answer-Metal
/.according to ABYC acceptable minimum clearance for routing wire near a dry exhaust
section is - Answer-9 inches (225 mm)
/.The maximum number of terminals allowed to be attached to any one terminal stud
based on ABYC is - Answer-4
/.How much current should flow through the
DC grounding conductor in a 25-amp DC motor circuit - Answer-0 amps
/.conductors of #10 AWG and larger shall be permitted to be connected in parallel
______ - Answer-Where the ampacity of each individual conductor is sufficient to carry
the entire load current shared by the parallel conductors
/.A technician is installing the cable run from the batteries to the main DC panelboard on
a boat aspart of a refit. The boat has a 12-volt system, and the distance from the panel
to the batteries is 15 ft (approximately 3 m).The maximum current draw from the panel
is calculated at 90 amps.What gauge cable should be used at a minimum to maintain
Standards compliance? - Answer-0 AWG
/.8. DC grounded conductors on new boats that are also equipped with AC systems
should use _________ insulation. - Answer-yellow
, /.the maximum spacing for cable run support based on ABYC is - Answer-16 inches
(400 mm)
/.the smallest gauge cable allowed for unsheathed wire runs through the boat is -
Answer-16 AWG
/.The maximum sustained charging voltage acceptable to some gel cell battery
manufacturers is - Answer-14.1
/.Sheathed, ungrounded conductors connected directly to a battery must have
overcurrent protection devices located within _______ of connection to the battery -
Answer-40 Inches
/.on a battery where a hydrometer can be used, a cell reading of 0.050 points of a
specific gravity below all of the other cells in the battery may indicate - Answer-A bad
cell and battery replacement needed
/.some battery manufacturers will only consider replacement on batteries whose
condition has been determined by use of a - Answer-conductance tester
/.Tech A says that sealed batteries can be mounted anywhere in the boat where space
can be found.TechBsays that consideration should be given to ventilation and the
mounting surfaces and the surrounding area near the battery, and their resistance to
acid attack.Which technician is correct? - Answer-tech B
/.Minimum battery reserve capacity allowed based on ABYC standards is - Answer-90
Minutes
/.Based on ABYC standards, cable attachment to batteries with wing type nuts is
allowed as long as the wire gauge does not exceed - Answer-8 AWG
/.Traditional battery load testing methods dictate that a load equivalent to _____ % of
the battery's CCA rating be placed on the battery - Answer-100
/.The metallic case of the battery charger should be connected to the - Answer-DC
grounding system
/.Tech A says that voltage supplied to the rotor controls alternator output voltage. Tech
B says that the alternator output is proportional to rotor voltage. Which Technician is
correct? - Answer-Both Techs
/.A voltage regulator controls which of the following? - Answer-Alternator field Voltage
/.To check for charger output to the battery, de-energize charger, check battery open-
circuit voltage, re-energize the charger and check for a voltage _____ V DC or more. -
Answer-Rise of 0.5 V DC
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