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Question

Difficulty: MediumDirect Fact Retrieval

Read the following technical passage:

During pre-flight pressure testing of an aircraft's pitot-static system, technicians connect a calibrated field test set to the fuselage pitot probe adapter. To prevent rupture of the internal airspeed indicator diaphragms, the pitot line pressure must not exceed 25 inches of water before the static equalization valve is opened. If the test set displays an unexpected differential pressure spike, the technician must immediately vent the pneumatic manifold using the manual dump valve rather than cycling the electrical pump switch. This ensures that moisture and pressurized air escape without straining the sensitive aneroid wafers.

According to the passage, what action must a technician take if an unexpected differential pressure spike occurs?

  1. A
    Cycle the electrical pump switch to reset system flow
  2. B
    Disconnect the field test set from the fuselage probe adapter
  3. Vent the pneumatic manifold using the manual dump valveAnswer
  4. D
    Adjust the pitot line pressure to exceed 25 inches of water

Answer

Vent the pneumatic manifold using the manual dump valve
The author explicitly states that if the test set displays an unexpected differential pressure spike, the technician must immediately vent the pneumatic manifold using the manual dump valve.

Step-by-Step Solution

1
Locate the specific condition mentioned in the prompt regarding an unexpected differential pressure spike.
Identified the sentence stating: 'If the test set displays an unexpected differential pressure spike, the technician must immediately vent the pneumatic manifold using the manual dump valve rather than cycling the electrical pump switch.'
Scanning for key terms isolates the exact sentence addressing the scenario.
2
Extract the explicit procedural instruction linked to that condition.
The technician must vent the pneumatic manifold using the manual dump valve.
Direct fact retrieval requires selecting the explicit statement provided in the text without inference.

Key Concept

Direct retrieval of explicitly stated procedures in technical text
Estimated Time:1m 0s
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Direct Fact Retrieval

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