Automotive Wiring & Wire Repair
ELECTRICAL Exam Questions With
Verified Answers.
20-22 Gauge Wire - answerUsed in radio speaker wires
Battery Cables - answerLargest wires used in the automotive electrical system
Color of Plastic of Blade Fuses - answerindicates the maximum current flow
Spark ...
20-22 Gauge Wire - answer✔Used in radio speaker wires
Battery Cables - answer✔Largest wires used in the automotive electrical system
Color of Plastic of Blade Fuses - answer✔indicates the maximum current flow
Spark Plug Circuit - answer✔Least likely to be controlled by mega fuses
Circuit Breakers - answer✔used to prevent harmful overload in a circuit by opening the circuit and
stopping the current flow to prevent overheating and possibly fire caused by hot wires or electrical
components
Cycling-Type Circuit Breakers - answer✔reset when the current stops flowing, thus causing the
bimetallic strip to cool and the circuit to close again.
Power Steering Systems - answer✔least likely to have circuit breakers in the circuits
Solder will not adhere to Aluminum - answer✔the heat causes an oxide coating on the surface of the
aluminum
Petroleum Jelly - answer✔used to coat a splice, crimped connection to prevent corrosion
Orange Conduit - answer✔used to cover wiring that carries high-voltage current from 144 to 650 volts
American Wire Gauge System Characteristic - answer✔the greater the amount of current that is flowing
through a wire, the larger the diameter that will be required.
Orange Conduit Circuit - answer✔most likely found in hybrid electric vehicles
Methods to Check Fusible Links & Mega Fuses truth - answer✔if the insulation of the fusible link
stretches, then the wire inside has melted and the fusible link must be replaced
Primary Wires - answer✔are designed to operate at or near battery voltage
Metric Gauge Size & AWG size - answer✔Metric wire size increases with increase in the area AND AWG
size gets smaller with larger size wire.
Circuit Breakers Views - answer✔protects the circuit from overheating AND provides sufficient current
flow to maintain at least partial headlight operation
PTC Circuit Protector Truth - answer✔the high resistance of the PTC reduces current flow in the circuit
Mini Fuses - answer✔Make troubleshooting easier because each circuit is separate
Blue or Yellow Conduits - answer✔used for electric power steering
Maxi Fuses - answer✔used to replace fusible links in many vehicles
Higher AWG number - answer✔the smaller the wire diameter
Metric Wire Size - answer✔measured in units of square millimeters
Fuse Rating - answer✔should be higher than the normal current for the circuit AND of the fuse rating,
80% should equal the current in the circuit
Connector - answer✔usually a plastic piece where terminals lock in
Rosin Core - answer✔solder that should be used for electrical work
Performing Wire Repair Under Hood - answer✔use a solder & adhesive-lined heat shrink tubing or a
crimp-&-seal connector
Testing Fuses - answer✔a test light should light on both test points of the fuse if it is ok AND the fuse is
defective if a test light only lights on one side of the fuse
Plastic Conduit Covering - answer✔used to identify the temp rating of the conduit, color identifies the
voltage level of conduits being protected, AND protects the wiring.
Insulated & Braided Ground Straps - answer✔more flexible to allow movement of the engine w/o
breaking the wire
Increase in current flow - answer✔causes a fuse to blow
Automotive Wiring - answer✔Made from strands of copper covered by plastic insulation.
Copper - answer✔great conductor, is reasonably priced, and very flexible.
Solid Copper Wire - answer✔Will break. Used for starter armature & alternator stator windings.
American Wire Gauge (AWG) - answer✔Wiring is sized & purchased according to gauge size assigned by
the AWG system.
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