FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

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When will the main system hydraulic pressure gauge show a reading after installing a hydraulic accumulator?

  1. Immediately after installation

  2. After the air chamber has been charged

  3. After the fluid side of the accumulator has been charged

  4. Once the hydraulic system is activated

The correct answer is: After the fluid side of the accumulator has been charged

When a hydraulic accumulator is installed, the main system hydraulic pressure gauge will show a reading after the fluid side of the accumulator has been charged. This is because the purpose of a hydraulic accumulator is to store hydraulic fluid under pressure. Once the fluid side of the accumulator has been charged, the hydraulic pressure within the system will be maintained by the accumulator, and this pressure will be reflected on the main system hydraulic pressure gauge. Options A, B, and D can be ruled out because they do not accurately describe the specific point at which the hydraulic pressure gauge will show a reading after installing a hydraulic accumulator.

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