At 4000 feet, what is the tachometer reading range for the Cessna 152?

The correct tachometer reading range for the Cessna 152 at 4000 feet is 1900-2450 RPM. This range is specified to ensure optimal engine performance during various stages of flight, including takeoff, climb, and cruise. Maintaining the engine RPM within this range helps to prevent overheating and ensures the engine operates efficiently and reliably.

Operating at or below the specified minimum of 1900 RPM helps ensure that the engine is adequately lubricated while also providing enough power for safe flight operations. The upper limit of 2450 RPM is designed to avoid excessive wear and potential damage to the engine.

The other ranges provided do not align with the manufacturer's recommended operating parameters for the Cessna 152 at this altitude. Proper adherence to these specifications is essential for safety and the longevity of the aircraft's engine.