A8-in.-diameter steel shaft is to have a press fit with a 16-in-diameter cast iron hub. both the hub and the shaft are 10 in long. using maximum normal stress theorem and appropriate safety factor, it was identified that the maximum allowable circumferential (a. k.a. hoop or tangential) stress in the hub is to be 7.5 ksi. the moduli of elasticity are 30 x 106 psi for steel and 15 x 106 psi for cast iron. the poisson's ratio for both steel and cast iron is 0.3 and coefficient friction for the two materials is 0.12. determine a)-the interference or the original mismatch. b)-the maximum axial force required to press the hub on the shaft.

What precautions should you take to prevent injuries when dealing with heavy loads?

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.