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Mechanical & Electrical Components Flashcards

7 cards from real ASE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Mechanical & Electrical Components flashcards as text

  1. A vehicle's battery reads 12.2 volts at rest. What is its approximate state of charge?

    Answer: 50%

    A resting voltage of 12.2V corresponds to roughly a 50% state of charge.

  2. Which tool is best for measuring excessive resistance (voltage drop) in a starter cable?

    Answer: Voltmeter set across the cable while cranking

    A voltage-drop test uses a voltmeter across a circuit under load to reveal hidden resistance.

  3. A whining noise from the alternator that rises with engine speed most likely indicates:

    Answer: Worn bearings

    Worn alternator bearings produce a whine or growl that tracks engine RPM.

  4. What does a parasitic draw test measure?

    Answer: Current drawn with the ignition off

    A parasitic draw test checks for current leaking from the battery while everything is off.

  5. Which component converts the alternator's AC output into DC for the vehicle?

    Answer: Rectifier diodes

    The diode rectifier bridge converts the stator's AC into usable DC.

  6. A starter that clicks but does not crank, with a good battery, most likely has:

    Answer: A faulty starter solenoid or high resistance

    A single click usually means the solenoid engages but the motor cannot turn, often from resistance or a bad solenoid.

  7. When using a digital multimeter to check a fuse in-circuit, you should set it to:

    Answer: Voltage and check for drop across the fuse

    With power on, a good fuse shows near 0V drop while a blown fuse shows full voltage across it.