In a thrust bearing, the external and the intermal diameters of the contacting surfaces are 320 mm and 200 mm respectively. The total axial load is 80 kN and the intensity of pressure is 350 kN/m?. The shaft rotates atę Op rpm. Taking the coefficient of friction as 0.os, calculate the power lost in overcoming the friction. Also, find the number of collars required for the bearing.

100 mm 200 mm GIVEN: Coefficient of static friction at A = 0.4 Collar at B is smooth and exerts horizontal force on pipe Mass of bracket is negligible ASK What is minimum distance x so bracket can support cylinder at any mass without slipping?

Q3-a/ What are the characteristics of material which used for lining friction surfaces of a clutch? (5Marks) b/ An engine developing 45 kW at 1000 r.p.m. is fitted with a cone clutch built inside the flywheel. The cone has a face angle of 12.5° and a maximum mean diameter of 500 mm. The coefficient of friction is 0.2. The normal pressure on the clutch face is not to exceed (0.1 N/mm2). Determine: 1. The face width required, and 2. The axial spring force necessary to engage the clutch Answer question 4 or 5 (15 Marks) 15 Q4/ The areas of the turning moment diagram for one revolution of a multi-cylinder engine with reference to the mean turning moment, below and above the line, are - 32, + 408,-267, +333,-310, +226,- 374, + 260 and 244 mm². The scale for abscissa and ordinate are: 1 mm = 2.4° and 1 mm = 650 N-m respectively. The mean speed is 300 r.p.m. with a percentage speed fluctuation of± 1.5%. If the hoop stress in the material of the rim is not to exceed 5.6 MPa, determine the…