In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of_________________?

Related Mcqs:

1. The mechanism involved in the removal of metal in drilling operation is by_________________?

   A. Compression
   B. Extrusion
   C. Shearing
   D. Both B & C

2. In extrusion of metals, which of the following statement is true ?

   A. Speed of the extruded material is same as that of ram speed
   B. Redundant work is a function of the die angle
   C. Relative motion between the billet surface and the container wall is always present
   D. Hollow ram is used for indirect extrusion

3. Hot extrusion of aluminium is done in the temperature range of ________________ °C ?

   A. 550-600
   B. 450-500
   C. 350-400
   D. 250-300

4. Solidification time of a molten metal in a casting is proportional to (where, V = volume of metal & A = its surface area; in the casting) ?

   A. V/A
   B. V/A2
   C. V2/A
   D. V2/A2

5. Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?

   A. Galvanising
   B. Tinning
   C. Sherardizing
   D. None of these

6. The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding _______________ grinding wheel is normally used ?

   A. Hard
   B. Soft
   C. Silicon carbide
   D. Aluminium oxide

7. Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of_________________?

   A. Lumps
   B. Pellets
   C. Briquettes
   D. Sinter

8. Powder metallurgy process does not make metal powder by_________________________?

   A. Atomisation
   B. Grinding/milling
   C. Hammering
   D. Electrolytic deposition

9. ____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?

   A. Lancing
   B. Shot peening
   C. Slugging
   D. Spinning

10. In the acid Bessemer process, the hot metal should have the following composition ?

    A. S < 0.05% and P < 0.05%
    B. S < 0.05% and P < 1.5%
    C. S 1.5%
    D. S > 1.5% and P < 0.05%