Adiesel engine with cr= 20 has inlet at 520r, a maximum pressure of 920 psia and maximum temperature of 3200 r. with cold air properties find the cutoff ratio, the expansion ratio v4/v3, and the exhaust temperature.

Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.