ASVAB Practice Test

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Prepare for the ASVAB exam with quizzes designed to improve your skills. Use flashcards and multiple choice questions, each providing hints and explanations. Get ready to succeed!

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Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

The function of the master cylinder is to

  1. Apply hydraulic pressure to the brake calipers

  2. Apply hydraulic pressure to the wheel cylinders

  3. Maintain engine oil pressure

  4. Regulate coolant temperature

The correct answer is: Apply hydraulic pressure to the wheel cylinders

The master cylinder is responsible for applying hydraulic pressure to the wheel cylinders, which in turn cause the brake shoes or pads to press against the brake drums or rotors. This creates friction and slows down the vehicle. Options A, C, and D are incorrect because they refer to functions that are not related to the master cylinder. Option A mentions brake calipers, which are part of the braking system but are not directly affected by the master cylinder. Option C refers to engine oil pressure, which is unrelated to the braking system. Option D mentions coolant temperature, which has no impact on braking. Therefore, B is the most accurate and logical answer for the function of the master cylinder.

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