simplified flanged pipe joint for liquid oxygen is pictured below. The internal pressure is 1000psi with an axial tensile load of 800 lbf. If the factor of safety should be at least four, determine the appropriate dimensions for BC, D, L, and the number of bolts and their preload given that ID = 4.026in., WT = 0.237in (4in. Sch.40), and fillet radius of 0.25in. The joint is made of 304L stainless steel and the bolts are to be Grade 8. Ignore any gaskets.

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.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false