The rate of change indicator is typically expressed in what unit?

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Multiple Choice

The rate of change indicator is typically expressed in what unit?

Explanation:
The rate of change indicator shows how quickly the aircraft’s altitude is changing, i.e., vertical speed. In aviation, altitude is typically expressed in feet, so the rate is shown in feet per minute. Positive values mean climbing, negative values mean descending. The other units don’t fit because meters per second would be a metric alternative not commonly used here, knots measure horizontal airspeed, and liters per minute is fuel flow, not vertical rate.

The rate of change indicator shows how quickly the aircraft’s altitude is changing, i.e., vertical speed. In aviation, altitude is typically expressed in feet, so the rate is shown in feet per minute. Positive values mean climbing, negative values mean descending. The other units don’t fit because meters per second would be a metric alternative not commonly used here, knots measure horizontal airspeed, and liters per minute is fuel flow, not vertical rate.

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