When can aircraft experience icing?

Question

BlackTom AI · Accepted Answer

When evaluating the question about aircraft icing, we need to consider the conditions that lead to icing rather than fixed calendar periods.
Option 1: 'Only during January and February' suggests a strict seasonal window. In reality, icing occurs whenever the combination of temperature, moisture, and supercooled droplets exists, which can happen outside these two months depending on the climate and weather patterns. Therefore this option is too restrictive and inaccurate.
Option 2: '365 days a year' states that icing may occur any day of the year, given the right atmospheric conditions. Since icing is contingent on the presence of supercooled liquid water and low enough temperatures, and those can occur at any time across many regions, this option correctly reflects the non-seasonal possibility of icing.
Option 3: 'Only from September to April' imposes a broad seasonal window that misses periods outside these months when conditions could still yield icing, such as in certain climates during late spring or early autumn or in winter in warmer regions. This makes the statement incorrect.
Option 4: 'Only during summer months' confines icing to a warmer part of the year, which contradicts the physics of icing, as icing typically occurs at colder temperatures when liquid droplets freeze on surfaces, not predominantly in summer. This is a misleading and inaccurate assertion.

In summary, icing is a weather-dependent phenomenon tied to temperature and moisture, and the most accurate among the options is the one that allows icing to occur year-round given suitable conditions, rather than tying it to a specific season.

AT 405 Final Exam - AT405

When can aircraft experience icing?

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