Ground de-icing operations for commercial aircraft utilize a two-step process in freezing precipitation to ensure safe takeoff. First, crews spray a heated Type I fluid, which combines glycol and water, to melt and wash away accumulated snow, ice, and frost from the fuselage and wings. However, because Type I fluid quickly runs off surfaces, technicians immediately apply a thicker, unheated Type IV fluid. This second fluid contains thickening agents that adhere to the aircraft's control surfaces, forming a protective barrier that prevents new ice accumulation during taxiing until high-speed airflow shears it off at rotation.
Which of the following statements best summarizes the passage?
- AThickened Type IV fluid forms a temporary barrier on flight control surfaces that shears away once the aircraft achieves takeoff speed.
- Aircraft ground de-icing relies on a sequential application of two distinct fluids to both clear existing frozen contamination and provide temporary protection before flight.Cevap
- CModern aviation safety protocols depend on chemical applications and aerodynamics to manage weather hazards during all phases of flight.
- DGround crews apply heated glycol mixtures directly to aircraft wings because unheated fluids are ineffective at removing frost and ice.
Cevap
Aircraft ground de-icing relies on a sequential application of two distinct fluids to both clear existing frozen contamination and provide temporary protection before flight.
The statement highlighting the sequential application of two distinct fluids to remove existing ice and provide pre-flight protection correctly synthesizes the entire passage. It captures both the de-icing action of Type I fluid and the anti-icing protection of Type IV fluid described across the text.
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Anahtar Kavram
Synthesizing a complete paragraph summary by capturing the central multi-step process rather than isolated details.
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