A90 mm diameter cylindrical part is turned on a lathe at 600 rpm. if the depth of cut is 5 mm, feed rate is 0.2 mm/rev, and specific energy of the workpiece material is 3.5 w? s/mm3, calculate the minimum power of the lathe.

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.