If takeoff is commenced with a completely blocked pitot tube, the airspeed indicator will show a reading that is

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Multiple Choice

If takeoff is commenced with a completely blocked pitot tube, the airspeed indicator will show a reading that is

Explanation:
The airspeed indicator measures dynamic pressure, which is the difference between the pitot (total) pressure and the static pressure. If the pitot tube is completely blocked, the instrument no longer receives changes in pitot pressure as airspeed changes. The pressure on the pitot side remains fixed at whatever value it was at the moment of blockage, while the static pressure on the other side changes only slowly with altitude. Because the dynamic pressure signal can’t vary, the indicator needle stays at a constant value. So the reading appears steady during takeoff.

The airspeed indicator measures dynamic pressure, which is the difference between the pitot (total) pressure and the static pressure. If the pitot tube is completely blocked, the instrument no longer receives changes in pitot pressure as airspeed changes. The pressure on the pitot side remains fixed at whatever value it was at the moment of blockage, while the static pressure on the other side changes only slowly with altitude. Because the dynamic pressure signal can’t vary, the indicator needle stays at a constant value. So the reading appears steady during takeoff.

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