Which of the following is NOT a responsibility of a grip?

The role of a grip on a film set primarily involves tasks related to lighting and rigging, excluding sound equipment handling. Grips are responsible for setting up lighting fixtures (though they don't operate the lights themselves—this is the role of the gaffer) and working with various rigging systems to ensure that lights and cameras are properly positioned.

Moving camera equipment is also a typical part of a grip's responsibilities, as they often assist with rigging gear that supports camera movement. Operating rigs and dollies fall under their duties as well, as grips work to facilitate camera movements, ensuring smooth shots.

Handling sound equipment is not part of the grip's responsibilities. Sound equipment is typically the domain of the sound department, which is responsible for capturing and managing audio during production. Therefore, identifying the handling of sound equipment as NOT a responsibility of a grip accurately reflects the distinct roles within the film production crew.