An item has constant failure rate 0.0005 hr. when the item fails, it is repaired to an "as good as new" condition. the associated mean downtime is 6 item is supposed to be in (a) find the average availability aav of the item. (b) how many hours per year will the item on average be out of operation?

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

The higher the astm grain size number, the finer the gran is. a)-true b)-false

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.