Which description corresponds to the hazard associated with the propeller plane of rotation?

Which description corresponds to the hazard associated with the propeller plane of rotation?

• A. Spins the blades: out a spinning propeller
• B. Remains stationary
• C. Driven by turbine
• D. Operates only during takeoff

Answer: (A)

The key idea is the danger zone created by a rotating propeller. When the blades spin, they sweep a circular path—the plane of rotation—and anything in that arc can be struck by a moving blade. That’s why the description that fits best is the one stating that the blades are spinning. It directly communicates the hazardous condition created by the propeller’s motion. The other descriptions don’t describe the hazard of rotation: remaining stationary doesn’t convey motion or the risk from moving blades; being driven by a turbine describes the propulsion source rather than the danger in the propeller’s rotation; and operating only during takeoff wrongly limits when the hazard exists, since rotating propellers pose risk whenever they’re turning, not just at takeoff.

The key idea is the danger zone created by a rotating propeller. When the blades spin, they sweep a circular path—the plane of rotation—and anything in that arc can be struck by a moving blade. That’s why the description that fits best is the one stating that the blades are spinning. It directly communicates the hazardous condition created by the propeller’s motion.

The other descriptions don’t describe the hazard of rotation: remaining stationary doesn’t convey motion or the risk from moving blades; being driven by a turbine describes the propulsion source rather than the danger in the propeller’s rotation; and operating only during takeoff wrongly limits when the hazard exists, since rotating propellers pose risk whenever they’re turning, not just at takeoff.