At 10,000 feet with an ambient temperature of -35°C, how does the true altitude compare to the indicated altitude?

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Test your knowledge of pitot-static systems for aviation exams. Study with multiple-choice questions and detailed explanations. Prepare effectively for success on your exam!

Multiple Choice

At 10,000 feet with an ambient temperature of -35°C, how does the true altitude compare to the indicated altitude?

Explanation:
Colder-than-standard temperatures shift pressure surfaces downward, so the atmosphere’s pressure at a given geometric height is lower than the standard model predicts. The altimeter, tuned to that standard model, will therefore indicate a higher altitude than your actual height in these conditions. So at 10,000 ft with an ambient temperature of -35°C, the true altitude is lower than the indicated altitude. (In hot conditions, the opposite effect occurs.)

Colder-than-standard temperatures shift pressure surfaces downward, so the atmosphere’s pressure at a given geometric height is lower than the standard model predicts. The altimeter, tuned to that standard model, will therefore indicate a higher altitude than your actual height in these conditions. So at 10,000 ft with an ambient temperature of -35°C, the true altitude is lower than the indicated altitude. (In hot conditions, the opposite effect occurs.)

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