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# GATE 2022 ME: Machine Design Quiz - 4

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Question 1

In a band brake, a rope is wrapped on a drum with angle θ = 150o and μ = 0.4. Tension in tight side is 5 kN and radius of drum is 80 mm. Frictional torque in brake-

Question 2

A disk clutch is required to transmit 10 kW at 1000 rpm. Coefficient of friction lining is 0.2. Outside radius of friction lining is 60 mm. If uniform contact pressure is 1.2 MPa, then the bore radius of friction lining is _____ mm.

Question 3

A single plate clutch is subjected to an axial force of 4 kN. The inside radius of the contact surface is 50 mm and the outside radius is 100mm. Assuming the uniform wear theory, the ratio of the average pressure to minimum pressure is______.

Question 4

The ratio of the inside diameter to the outside diameter for maximum torque transmitting capacity for old brake

Question 5

In case of a multiple disc clutch, if n1 are the number of discs on the driving shaft and n2 are the number of the discs on the drive shaft, then the number of pairs of contact surfaces will be

Question 6

A car of mass 1000 kg is moving down the hill at a slope of 1: 4 at 108 km/hr. The braking torque(in Nm) to be applied to stop the vehicle in a distance of 100 m, is _______ . Diameter of tyre is 0.5m (Neglect all the frictional energy except for the brake)
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