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Difficulty: MediumDirect Fact Retrieval

High-voltage electrical substations utilize sulfur hexafluoride circuit breakers to isolate transmission faults. Inside the breaker's expansion chamber, technicians install molecular sieve desiccant packets to absorb residual moisture, which would otherwise react with arc byproducts to generate corrosive hydrofluoric acid. During scheduled five-year maintenance, technicians replace the desiccant and recharge the sealed tank until the pressure reaches 0.65 megapascals before energizing the bus bar. If an internal density monitor registers a drop below 0.58 megapascals, an automated interlock halts breaker operation to prevent catastrophic contact failure.

According to the passage, what occurs when the circuit breaker's internal pressure falls below 0.58 megapascals?

  1. A
    The five-year maintenance cycle is automatically reset.
  2. An automated interlock halts breaker operation.Answer
  3. C
    Corrosive hydrofluoric acid is released to seal the chamber.
  4. D
    Technicians immediately energize the main bus bar.

Answer

An automated interlock halts breaker operation.
The passage explicitly states in the concluding sentence that if the density monitor registers a pressure drop below 0.58 megapascals, an automated interlock halts breaker operation.

Step-by-Step Solution

1
Locate the targeted numerical condition in the passage.
Identified the condition describing an internal pressure drop below 0.58 megapascals in the final sentence.
Direct fact retrieval requires locating the specific keyword or parameter in the text.
2
Extract the explicit factual outcome associated with this condition.
The text states that an automated interlock halts breaker operation.
Matching the explicit statement eliminates incorrect alternatives and confirms the direct fact.

Key Concept

Direct Fact Retrieval
Estimated Time:1m 0s
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Topics

Direct Fact Retrieval

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