SSC JE Mechanical Engineering 2018 Set 1 Paper

Common type of friction clutch are
(i) Disk (Plate) clutch - same as flat collor bearing Torque $\mathit{T}=\frac{2}{3}\mathit{\mu }\mathit{w}\left[\frac{{\mathit{r}}_1^3-{\mathit{r}}_2^3}{{\mathit{r}}_1^2-{\mathit{r}}_2^2}\right]$ (Considering uniform pressure theory)
(ii) Cone clutch - same as trapezoidal conical pivotbearingTorque $\mathit{T}=\frac{2}{3}\mathit{\mu }\mathit{w}\left[\frac{{\mathit{r}}_1^3-{\mathit{r}}_2^3}{{\mathit{r}}_1^2-{\mathit{r}}_2^2}\right]\mathrm{cosec}\mathit{\alpha }$ (Considering uniform pressure theory)