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Zorluk: OrtaExplicit Main Idea

Aircraft tires are inflated exclusively with dry nitrogen rather than compressed ambient air to ensure operational safety and stability under extreme conditions. Nitrogen is an inert gas that eliminates moisture, thereby preventing internal rim corrosion and reducing the risk of tire degradation. Furthermore, unlike ambient air containing water vapor, dry nitrogen undergoes predictable and minimal pressure changes during drastic temperature swings, such as shifting from sub-zero cruising altitudes to high-heat friction on landing runways. This thermal consistency prevents dangerous pressure spikes and structural failures during demanding braking maneuvers.

Which of the following statements expresses the main idea explicitly stated in the passage?

  1. A
    Water vapor in ambient air expands unpredictably during rapid temperature transitions.
  2. Aircraft tires use dry nitrogen instead of ambient air to maintain safety and performance in extreme conditions.Cevap
  3. C
    All modern aviation pneumatic systems require dry inert gases to eliminate structural wear.
  4. D
    High-heat friction generated during runway touchdown is the primary cause of aircraft structural failure.

Cevap

Aircraft tires use dry nitrogen instead of ambient air to maintain safety and performance in extreme conditions.
The passage begins with an explicit topic sentence stating that aircraft tires are inflated exclusively with dry nitrogen rather than ambient air to ensure operational safety and stability under extreme conditions. The remaining sentences directly support this thesis by detailing the chemical and physical reasons for this practice.

Adım Adım Çözüm

1
Locate the explicit topic sentence
Identified the opening sentence: 'Aircraft tires are inflated exclusively with dry nitrogen rather than compressed ambient air to ensure operational safety and stability under extreme conditions.'
Explicit main ideas in technical and expository paragraphs are directly stated, commonly appearing in the opening sentence.
2
Evaluate remaining sentences against the topic sentence
The subsequent sentences provide supporting details (inert properties, moisture elimination, pressure stability across temperature extremes).
Supporting details elaborate on the core premise rather than establishing a new main theme.
3
Match the explicit main idea with the correct choice
The statement expressing that aircraft tires use dry nitrogen instead of ambient air to maintain safety and performance in extreme conditions matches the opening topic sentence.
The correct answer must directly reflect the passage's primary focus without narrowing to minor details or generalizing beyond the text.

Anahtar Kavram

Explicit Main Idea Identification
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Konular

Explicit Main Idea

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