If a drive gear is required to rotate a driven gear in the same direction of rotation,which of the following is a requirement?

A) drive gear must be larger in diameter than the driven gear
B) drive gear must double the number of teeth on the driven gear
C) idler gear is required between the drive and driven gears
D) two tooth-meshed gears always turn in the same direction

Idler Gear

An Idler Gear is a gear positioned between two other gears to transmit motion from one to the other, often used to change the direction of rotation or to adjust the spacing between driving and driven gears.

Direction Of Rotation

The clockwise or counterclockwise movement of a mechanical component or system as seen from a specific vantage point.

Drive Gear

Any gear that drives another.