Discussion
Statement I: The airspeed indicator does not read true airspeed except in specific conditions.
Statement II: It responds to dynamic pressure, which depends on air density as well as speed.
In the light of the above statements, choose the correct answer.
Answer: C
Correct answer: Both Statement I and Statement II are correct
Both are true and the second explains the first. The instrument measures the difference between total and static pressure, which is dynamic pressure, and dynamic pressure depends on the product of density and the square of the speed. Since the dial is graduated assuming sea level standard density, the reading equals true airspeed only when the air actually is at that density.
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