Q1. Alligatoring is the defect arises in the process:
(a) Extrusion (b) Rolling (c) Drawing (d) Punching
Q2. Which of the following is the smallest rolled product:
(a) Ingot (b) Bloom (c) Billet (d) Slab
Q3. The velocity of ram used in simulation of rolling process is:
(a) 0.5 mm/sec, 1 mm/sec, 1.5 mm/sec (b) 1 mm/sec, 1.5 mm/sec, 2 mm/sec (c) 1 mm/sec, 2 mm/sec, 3 mm/sec (d) 1 mm/sec, 5 mm/sec, 10 mm/sec
Q4. The material which is not used in simulation for rolling operation is:
(a) Aluminium (b) Copper (c) Steel (d) Zinc
Q5. The direction of rotation of upper and lower rollers in roller operation is:
(a) Same direction (b) Opposite direction (c) Both direction (d) No direction
Q6. In order to get uniform thickness of plate by rolling process, one provides:
(a) Chamber on rolls (b) Hardening of the rolls (c) Offset on the rolls (d) Anti-friction bearing
Q7. The property of a material by which it can be rolled into sheets is called:
(a) Elasticity (b) Plasticity (c) Ductility (d) Malleability
Q8. Hot rolling of mild steel is carried out:
(a) At Re-crystallisation Temperature (b) Between 100oC and 150oC (c) Above Re-crystallisation Remperature (d) Below Re-crystallisation Temperature
Q9. The number of steps involved in making a rod from a 100 mm × 100 mm billet are:
(a) 1 (b) 4 (c) 6 (d) 10
Q10. In metals subjected to cold working, strain hardening effect is due to the mechanism of:
(a) Slip (b) Twinning (c) Dislocation (d) Fracture