A flange coupling having 180 mm bolt circle and 19 mm thick uses 12 bolts, 16 mm diameter to connect two shafts. It is used to transmit 80 Hp at 180 rpm. Determine the factor of safety in bearing if yield point in compression is 65 ksi.

A flat belt is required to transmit 35 kw from a pulley of 1.5 m effective diameter running at 300 rpm. The angle of contact spread over 11/24 of the circumference and the coefficient of friction between pulley and belt 0.3. Determine width of belt required. It is given that the belt thickness is 10mm, density of its material is 1.1Mg/m and the related permissible working stress is 2.5 Mpa.

A rigid block is supported by two cables having the same diameter of 4 mm. Cable S1 is made of AISI 1050 cold drawn steel with E=200,000 MPa, Sy=580 MPa, and Sult=690 MPa; cable S2 is made of AISI 1020 cold drawn steel with E=200,000 MPa, Sy=390 MPa, and Sult=470 MPa. Determine the maximum number of cycles n3 due to the following history of P.

HW9 In an engine governor of the Porter type, the upper and lower arms are 300 mm and 350 mm respectively and pivoted on the axis of rotation. The mass of the central load is 17 kg, the mass of each ball is 3 kg and friction of the sleeve together with the resistance of the operating gear is equal to a load of 27 N at the sleeve. If the limiting inclinations of the upper arms to the vertical are 35° and 45°, find, taking friction into account, the range of speed of the governor and Sensitiveness of Governors.