AMP - Aviation Maintenance Technician Powerplant Practice Exam

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Which statement best describes the blowout type indicator disk on a fixed fire extinguishing system?

  1. When the red indicator disk is missing, it indicates the fire extinguishing system is charged and ready for use

  2. When the yellow indicator disk is missing, it indicates the fire extinguishing system has been normally discharged

  3. When the green indicator disk is missing, it indicates that the fire extinguishing system may have been normally discharged

  4. None of the above

The correct answer is: When the yellow indicator disk is missing, it indicates the fire extinguishing system has been normally discharged

The blowout type indicator disk on a fixed fire extinguishing system serves as a visual indication of the system's status. When the yellow indicator disk is missing, it means that the system has been normally discharged. This means that the extinguishing agent has been used and the system needs to be recharged or replaced. Option A is incorrect because the red indicator disk is typically used to show that the system is charged and ready for use, and its absence would not necessarily indicate a discharge. Option C is incorrect because the green indicator disk is typically used to show that the system has been tested and functioning properly, not necessarily indicating a discharge. Option D is incorrect because one of the options must be correct.

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