In a planetary gear set , Technician A says the output gear member always moves in the opposite direction to the planet carrier when the planet carrier is the input. Technician B says the planet carrier always follows the direction of the input member when the planet carrier is the output. Who is correct?
A)A only
B)B only
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct. In a planetary gear set, when the planet carrier is the input, the output gear member always moves in the opposite direction to the planet carrier. This is because the planet gears have to rotate and orbit around the sun gear, which causes the output member to rotate in the opposite direction.

Technician B is incorrect. The planet carrier does not always follow the direction of the input member when the planet carrier is the output. The planet carrier can rotate in the same direction as the input member, but at a different speed, depending on the gear ratio and configuration of the planetary gear set.

In a Planetary Gear Set , Technician a Says the Output