Technician A says the Sprag-type one-way clutch operates by using two sets of plates known as the friction plates and reaction plates. Technician B says that when used to input the gear set, the hydraulic clutch is called a rotating clutch. Who is correct?

Technician A says the Sprag-type one-way clutch operates by using two sets of plates known as the friction plates and reaction plates. Technician B says that when used to input the gear set, the hydraulic clutch is called a rotating clutch. Who is correct?

• A. Technician A
• B. Technician B
• C. Both Technician A and Technician B
• D. Neither Technician A nor Technician B

Answer: (B)

Sprag-type one-way clutches use sprags (wedges) between inner and outer races to lock in one direction and transfer torque, rather than relying on friction and a stack of friction and reaction plates. So describing a Sprag clutch as using two sets of plates is not accurate. When a hydraulic clutch is used to input the gear set, it carries torque as part of the rotating power flow, so it’s referred to as a rotating clutch—the clutch components rotate with the input shaft and transmit torque into the gear train. This distinguishes it from arrangements that hold parts stationary. Therefore, the correct statement is that the hydraulic clutch input is a rotating clutch.

Sprag-type one-way clutches use sprags (wedges) between inner and outer races to lock in one direction and transfer torque, rather than relying on friction and a stack of friction and reaction plates. So describing a Sprag clutch as using two sets of plates is not accurate.

When a hydraulic clutch is used to input the gear set, it carries torque as part of the rotating power flow, so it’s referred to as a rotating clutch—the clutch components rotate with the input shaft and transmit torque into the gear train. This distinguishes it from arrangements that hold parts stationary. Therefore, the correct statement is that the hydraulic clutch input is a rotating clutch.