Which airspeed range is indicated by the green arc?

The indicated airspeed range represented by the green arc on an airspeed indicator signifies the normal operating range for the aircraft. This range indicates the speeds at which the aircraft can fly safely and efficiently without risking structural damage or stalling under normal operations.

In general, the green arc is designed to show the speeds that are safe for taking off, cruising, and landing, allowing pilots to maintain proper control and performance. For the Cessna 152, the range typically falls between 40 KIAS and 111 KIAS, making this option the correct choice. This range is crucial during various phases of flight, including takeoff and landing, where specific airspeeds must be observed for safe maneuvering.

The values below and above this spectrum represent different flight conditions; speeds below the green arc can lead to stall conditions, while speeds above it may increase the risk of structural failure or loss of control. Recognizing this range is essential for new pilots to ensure safety and adherence to operating procedures during flight.