The gear drive torque is ______ the gear ratio.

• A. Directly Proportional To
• B. Inversely Proportional To
• C. Independent Of
• D. Equals

Answer: (A)

Torque in a gear train scales with the gear ratio. In an ideal gear drive, the output torque is proportional to the gear ratio: T_out = T_in × i, where i is the gear ratio (how much the speed is reduced). So, increasing the ratio increases the torque by the same factor (minus real-world losses due to efficiency). This relationship also means speed is reduced as torque increases, reflecting the common speed-torque trade-off in gearing.