Of the following cutting conditions which one has the greate

Of the following cutting conditions, which one has the greatest effect on tool wear? Cutting speed Depth of cut Feed Materials used Which one of the four types of chip would he expected in a turning operation conducted at low cutting speed on a brittle work material ? continuous continuous with built-up edge discontinuous serrated none Springback in a sheet-metal bending operation is the result of which of the following? elastic modulus of the metal elastic recovery of the metal overbending overstraining yield strength of the metal As sheet-metal stock hardness increases in a blanking operation, the clearance between punch and should be decreased increased remain the same there is no correlation between hardness of the material and clearance of the die The wrinkling of sheet metals increases with decrease in sheet thickness increases with nonuniformity of the thickness of the steels increases with increasing length of the sheet increases with increasing surface area of the sheet All are correct According to the Merchant equation, an increase in rake angle would have which of the follow results, all other factors remaining the same, (two best answers) decrease in friction angle decrease in power requirements decrease in shear plane angle increase in cutting temperature increase in shear plane angle If you cut with a dull tool tip you would expect (three best answers) the force required for cutting to increase the tool temperature to increase improvement of surface finish an increase in tool life the tendency for built up edge formation increases

Solution

1) a

cutting velocity have greatest effect on tool wear.

2) c

Discontinuous chips.

3) b

Spring back action is due to the elastic recovery of metal.

4) b

Clearance blw punch and die is directly proportional to square root of materal shear strenth so clearance increases as hardness increases.

5) e

6) a,e

7) a,b,e