Mechanical Metallurgy Mock Test 10

1. If the drawing ratio of the cup is 1.5 and the final diameter of the workpiece is 120 mm, find the diameter of the blank?

2. For the significant reduction in the rod diameter or the commercial application reduction, the nature of longitudinal stress on the surface is __________ and _________ in the center axis.

3. The maximum stress/force that can be applied on the billet is more in indirect extrusion compared to direct extrusion.

4. The stretcher-strain marks is the defect associated with which of the following metal forming process?

5. The velocity of the sheet in the rolling machine keeps on increasing from entering to exit from the rolls.

6. The patenting heat treatment is given to every batch and every kind of wire.

7. If the material is elongated 30% in length and 40% in width, find the normal anisotropy of the material?

8. If the effective flow stress for extrusion is 100 MPa and the extrusion ratio is 4, then find the ideal extrusion pressure for the process?

9. For the reduction pass around one percent, the circumferential residual stress on the surface of rod is ___________ and _________ at axis.

10. A steel sheet of thickness 25 mm is sheared with a knife, and the fracture length is 50 mm. Find the shear force required, if the tensile strength of steel is 250 MPa?