value of outside radius of the friction lining is A 35.7mm C 97.9mm B 49.5mm D 142.9mm 10. Two helical springs are used in series. Calculate the equivalent spring rate (k eq ), where k 1 = 30 lb/in , k 2 = 60 lb/in A 24 lb/ in C 90 lb/in
B 29 lb/ in D 20 lb/in 11. A band brake consist of lever attached vertically to one end of the band (band connected midpoint of the lever which is 2m long). The other end of the band is fixed to the ground. The wheel has radius of 200 mm and the wrap angle of the band is 270 deg. The braking force applied to the lever is limited to 100N and the coefficient of friction between the band and wheel is 0.5. A 1200N C 3224N B 2110N D 4420N 12. A car travels haft distance between two points at a speed of 40 km/hr abd remaining half at a speed of 60 km/hr Average speed of car would be A 36 km/hr C 28 km/hr B 48 km/hr D 72 km/hr 13. A type of welding flame which has acetylene and oxygen of equal proportions. A neutral flame C reducing flame B oxidizing flame D any of the above 14. A pulley has a net belt pull of 2.5 kN. If a 20 hp motor is used to drive the pulley, determinethe belt speed. A 7.565 m/s C 6.78 m/s B 3.25 m/s D 5.97 m/s 15. A 60 inch diameter steel pipe 3/8 inch thick carries water under pressure head of 550 ft. Determine the hoop stress in steel.