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Automotive EOP Practice Test

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Which device contains high-current contacts that connect the battery to the cranking motor?
Correct Answer:
Starter Solenoid
Explanation:
The starter solenoid is the device that contains the high-current contacts to connect the battery to the cranking motor. When you turn the key, a small current energizes the solenoid’s coil, which pulls in a switch that closes the heavy-duty contacts. Those contacts then complete the circuit from the battery positive to the starter motor, delivering the high current needed to crank the engine. The alternator is for charging the battery, the ignition coil handles spark, and a battery cable is just a conductor rather than a device with its own high-current contacts.

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