Aerial dispersal systems may be wind driven or ____________ powered by the aircraft engine.

Aerial dispersal systems may be wind driven or ____________ powered by the aircraft engine.

• A. Hydraulic
• B. Mechanical
• C. Chemical
• D. A and B

Answer: (D)

Aerial dispersal systems can be driven by the air moving past the aircraft or by the engine itself through hydraulic or mechanical means. When powered from the engine, hydraulic systems use a pump to create fluid pressure that operates the metering and discharge mechanisms, while mechanical systems use a direct drive, shafts or gears to turn the dispersal components. Because both hydraulic and mechanical power are common engine-driven options, the correct choice recognizes both possibilities. The option referring to chemical isn’t a power source for the equipment, so it isn’t applicable.

Aerial dispersal systems can be driven by the air moving past the aircraft or by the engine itself through hydraulic or mechanical means. When powered from the engine, hydraulic systems use a pump to create fluid pressure that operates the metering and discharge mechanisms, while mechanical systems use a direct drive, shafts or gears to turn the dispersal components. Because both hydraulic and mechanical power are common engine-driven options, the correct choice recognizes both possibilities. The option referring to chemical isn’t a power source for the equipment, so it isn’t applicable.