For a parallel axis single reduction gear, what statement is true?

Correct Answer: Option A — The drive pinion is the smaller of the two gears and rotates at a relatively high-speed. The driven gear is the larger of the two gears and rotates at a relatively low-speed.

In parallel axis gearing, the pinion is the smaller gear connected to the high-speed prime mover, while the larger driven gear rotates at a lower speed. This configuration provides the necessary mechanical advantage to reduce rotational speed while increasing torque output for the propeller shaft.