A brass bolt (Eb = 15 X 10^6 psi) of 3/8 in. diameter is fitted inside a steel tube (Es = 29 X 10^6 psi) of 7/8-in. outer diameter and 1/8 in. wall thickness. After the nut has been fit snugly, it is tightened a one-quarter full turn. Knowing that the bolt is single-threaded with a 0.1-in. pitch, determine the normal stress in: a. The bolt
b. The tube.

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.

Give heat transfer applications for the following, (i) gas turbines (propulsion) ) gas turbines (power generation). (iii) steam turbines. (iv) combined heat and power (chp). (v) automotive engines

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.