What three actions are needed to preflight the megaphone?

The correct answer involves the specific actions needed to ensure that the megaphone is functioning properly before it is used in an emergency or for communication purposes. Squeezing the handle allows the user to activate the device, while listening for sound confirms that the megaphone is operational and has sufficient volume. Finally, verifying that the megaphone is securely in its bracket ensures that it is safely stowed and easily accessible for use.

Each of these steps is crucial for confirming functionality and safety, as they collectively assure that the megaphone is ready to be used effectively. Maintaining regular checks on such equipment is part of proper safety protocol in aviation settings.

Other suggested choices focus on somewhat related aspects but do not encompass the essential preflight actions: testing battery levels and checking for physical integrity may be involved in some contexts but don't specifically address the operational readiness indicated in the correct choice.