Correct option is D
In
positive contact clutches, power transmission is achieved by
shear contact, meaning the driving and driven members engage mechanically through interlocking teeth, jaws, or projections. Unlike friction clutches, these clutches
do not rely on friction to transfer power.
Characteristics of Positive Contact Clutches:
·
No slippage – Since engagement is mechanical, power transmission is
100% efficient when engaged.
·
Used in low-speed, high-torque applications – Common in machines where precise engagement is required.
·
Types include:
·
Jaw Clutch – Uses interlocking jaws.
·
Dog Clutch – Uses protruding lugs or dogs.
·
Requires disengagement before shifting – Because of the rigid connection, shifting while in motion can cause damage.
