Analysis of Disc Clutch

Q. A clutch has outer and inner diameter $100mm$ and $40mm$ respectively. Assuming a uniform pressure of $2MPa$ and coefficient of friction of the material is $0.4$, the torque carrying capacity of the clutch is

1. $148Nm$
2. $196Nm$
3. $372Nm$
4. $490Nm$

Q. A disk clutch is required to transmit 5 kW at 2000 rpm. The disk has a friction lining with coefficient of friction equal to 0.25. Bore radius of the friction lining is equal to 25 mm. Assume uniform contact pressure of 1 MPa. The value of outside radius of the friction lining is

1. 39.4 mm
2. 49.5 mm
3. 97.9 mm
4. 142.9 mm