Which word best describes resistance to turning or twisting in mechanical systems, including its use in aviation contexts?

• A. Thrust Line
• B. Torquemeter
• C. Torque
• D. Thrust Aerodynamic Force

Answer: (C)

Torque is the twisting effect a force has about an axis; it represents the resistance to turning in a mechanical system. In aviation contexts, you deal with engine and propeller torque—the twisting load on a shaft that resists or drives rotation. A torquemeter is the instrument used to measure that twisting moment, not the concept itself. Thrust concepts describe linear push along the engine’s axis, not rotation. So torque is the best fit because it directly expresses the rotational effort or resistance around an axis in mechanical and aviation applications.