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  4. ASVAB Section 4: Automotive and Shop Information

Free ASVAB Section 4: Automotive and Shop Information Exam Braindumps
ASVAB Section Four : Automotive & Shop Information Questions 86–90 (page: 19)

Updated On: 9-Feb-2026
Page 19 of 43
PDF with 206 Questions

Battery electrolyte is a mixture of distilled water and _______________.

  1. baking soda
  2. sulfuric acid
  3. lead peroxide
  4. carbon particles

Answer(s): B

Explanation:

Battery electrolyte is a mixture of approximately 60% distilled water and 40% sulfuric acid.



The brushes in an alternator ride on .

  1. the commutator
  2. the stator
  3. slip rings
  4. the heat sink

Answer(s): C

Explanation:

Two slip rings are mounted on the rotor shaft. Two brushes ride on the slip rings and deliver electrical energy to the rotor windings.



When all other lights show normal illumination but one headlight is dim, it is a good sign that the .

  1. battery is weak.
  2. headlight switch is defective.
  3. headlight unit needs adjustment.
  4. headlight has a poor ground connection.

Answer(s): D

Explanation:

A loose or corroded headlight ground connection will cause a dim light. If the headlight switch is faulty, all lights will be affected, not just the headlight.



If air gets into the hydraulic brake system, .

  1. brake application will be hard.
  2. it will have no effect.
  3. brake pedal action will be spongy.
  4. the brake pedal will stick.

Answer(s): C

Explanation:

Air is compressible and will cause a spongy or soft brake pedal action.



The proportioning valve in a hydraulic brake system ______________.

  1. reduces pressure to the front brakes.
  2. controls the brake warning switch.
  3. is used only on drum-type brake systems.
  4. reduces pressure to the rear brakes.

Answer(s): D

Explanation:

A proportioning valve is commonly used on a vehicle equipped with front disc and rear drum-type brakes. The valve reduces hydraulic pressure to the rear drum brakes to prevent rear wheel lockup and skidding during heavy brake pedal application.



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