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Automotive Information Flashcards

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

Read the first 7 Automotive Information flashcards as text

  1. What is the purpose of a differential in a vehicle's drivetrain?

    Answer: To allow drive wheels to rotate at different speeds when turning

    The differential allows the outer wheel to rotate faster than the inner wheel during a turn, preventing tire scrub and allowing smooth cornering.

  2. What is 'detonation' (engine knock) in a gasoline engine?

    Answer: Uncontrolled premature ignition of the air-fuel mixture before the spark plug fires

    Detonation (knock) occurs when the compressed air-fuel mixture ignites spontaneously before the spark plug fires, creating a characteristic knocking sound and potentially damaging the engine.

  3. What is the primary function of anti-lock brakes (ABS)?

    Answer: To prevent wheel lockup during hard braking, maintaining steering control

    ABS prevents wheels from locking up during emergency braking by rapidly modulating brake pressure, allowing the driver to maintain steering control.

  4. Which component seals the combustion chamber between the cylinder block and cylinder head?

    Answer: Head gasket

    The head gasket seals the joint between the engine block and cylinder head, preventing combustion gases, coolant, and oil from mixing or leaking externally.

  5. What does a vehicle's mass airflow (MAF) sensor measure?

    Answer: The amount of air entering the engine to help calculate fuel delivery

    The MAF sensor measures the mass of air entering the engine, and the ECU uses this data to calculate the correct fuel injection quantity for the proper air-fuel ratio.

  6. If a car's temperature gauge rises to the red zone while driving, what should the driver do first?

    Answer: Safely pull over and shut off the engine to prevent damage

    An overheating engine can suffer severe damage quickly; the correct response is to safely stop and shut off the engine to allow it to cool before investigating the cause.

  7. What type of suspension system uses a single large pivot point per wheel, with no upper control arm?

    Answer: MacPherson strut suspension

    MacPherson strut suspension combines the shock absorber and strut into a single unit attached to the steering knuckle, requiring only a lower control arm and no upper control arm.