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Question

Difficulty: EasyDirect Fact Retrieval

When setting up a high-frequency tactical wire antenna in forested terrain, operators must elevate the central balun at least 20 feet above ground level to ensure adequate signal propagation. The support halyard should be anchored exclusively to living hardwood trees, as dead pine branches risk snapping under line tension. After securing the antenna wire, the coaxial feedline must be routed at a 90-degree angle away from the radiating element to prevent electromagnetic interference.

According to the passage, what is the minimum height at which the central balun must be elevated?

  1. A
    10 feet
  2. 20 feetAnswer
  3. C
    90 feet
  4. D
    Ground level

Answer

20 feet
The passage explicitly states in the first sentence that operators must elevate the central balun at least 20 feet above ground level to ensure adequate signal propagation.

Step-by-Step Solution

1
Identify the key subject and descriptor in the question stem.
The target detail is the minimum elevation height required for the central balun.
Direct fact retrieval requires locating the specific sentence discussing balun height.
2
Scan the passage text for the keywords 'central balun' and 'elevate'.
The first sentence specifies that operators must elevate the central balun at least 20 feet above ground level.
Matching explicit keywords directly reveals the stated factual value.
3
Select the option that matches the stated factual quantity.
The measurement '20 feet' exactly matches the explicit requirement.
In direct retrieval items, the correct answer reflects the exact factual statement in the text without modification.

Key Concept

Direct Fact Retrieval
Estimated Time:45s
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Topics

Direct Fact Retrieval

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