In a clutch arrangement where reaction plates are splined to the inside of the case and friction plates to the held component, what is this clutch type called?

In a clutch arrangement where reaction plates are splined to the inside of the case and friction plates to the held component, what is this clutch type called?

• A. Roller- or sprag-type one-way clutch
• B. Sprag-type one-way clutch
• C. Rotating
• D. Stationary

Answer: (D)

The key idea here is which part stays fixed and which part is driven when the clutch is engaged. If the reaction plates are splined to the inside of the case, that surface is fixed to the housing and acts as the stationary reaction for torque. The friction plates are splined to the held component, so when engagement occurs they transmit torque from the case (or input) to that component while the case remains stationary. In this setup, the fixed reaction surface defines a stationary one-way/clutch arrangement. The other options describe different internal mechanisms or the rotating-side configuration, which doesn’t match the described plate-to-case arrangement.

The key idea here is which part stays fixed and which part is driven when the clutch is engaged. If the reaction plates are splined to the inside of the case, that surface is fixed to the housing and acts as the stationary reaction for torque. The friction plates are splined to the held component, so when engagement occurs they transmit torque from the case (or input) to that component while the case remains stationary. In this setup, the fixed reaction surface defines a stationary one-way/clutch arrangement. The other options describe different internal mechanisms or the rotating-side configuration, which doesn’t match the described plate-to-case arrangement.