FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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Prepare for the FAA AMT Airframe Exam with our comprehensive quiz. This resource offers multiple-choice questions designed to enhance your knowledge and understanding of aviation maintenance concepts.

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What is the purpose of a compensating port or valve in a brake master cylinder of an independent brake system?

  1. To increase hydraulic pressure

  2. To decrease hydraulic pressure

  3. Permits the fluid to flow toward or away from the reservoir as temperature changes

  4. To block fluid flow completely

The correct answer is: Permits the fluid to flow toward or away from the reservoir as temperature changes

In the brake master cylinder of an independent brake system, a compensating port or valve serves the purpose of allowing the hydraulic fluid to flow towards or away from the reservoir as temperature changes. This function is crucial because as the temperature fluctuates, the volume of the hydraulic fluid also changes. By permitting the fluid to move in response to temperature variations, the compensating port or valve helps maintain the proper fluid level and prevents over-pressurization or under-pressurization of the brake system. As for the other options: A. To increase hydraulic pressure - This is not the purpose of a compensating port or valve in this context. B. To decrease hydraulic pressure - This is not the purpose of a compensating port or valve in this context. D. To block fluid flow completely - This is not the purpose of a compensating port or valve in this context.