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The mechanism involved in the removal of metal in drilling operation is by

A. Compression

B. Extrusion

C. Shearing

D. Both 'b' & 'c'

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. The yield point phenomenon observed in annealed low carbon steel is due to the presence of the following…
  2. Which of the following metals is not subjected to electrolytic refining/purification?
  3. Brittleness induced due to the presence of sulphur in steel can be reduced by adding
  4. A dummy activity is used in PERT network to describe the
  5. The malleability of a material is the property by virtue of which it can be rolled or hammered into…
  6. Sudden fall of atmospheric pressure by a large amount is an indication of the
  7. Annealing of white cast iron produces __________ iron.
  8. Coating provided on the electrodes used in the arc welding is not expected to
  9. Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
  10. Which of the following does not discharge the dust collected as a dry solid?
  11. Normalising of a casting does not
  12. Fog is an example of colloidal system of
  13. __________ iron is produced by the annealing of white cast iron.
  14. Mild steel has __________ crystal lattice structure.
  15. The cathode in an electrochemical cell always carries
  16. __________ of air does not increase with increase in temperature.
  17. With increase in compression ratio, the volumetric efficiency of air compressor
  18. Most important property of steels for use in automobile bodies is the
  19. The most commonly used moderator in nuclear power plants is
  20. The elastic strain energy of a unit length of an edge dislocation as compared to that of a screw dislocation…
  21. Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at…
  22. Catalyst used in the catalytic converter employed in automobiles to convert CO into CO2 and for complete…
  23. A polymer is termed as an 'elastomer', if its percentage elongation is more than 100%. An elastomer…
  24. A steam pipe is intended to be insulated with two layers of insulating materials of different thermal…
  25. Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition…
  26. Lead is poured into the joint between two- __________ pipes.
  27. Coarse grained steels have
  28. Pick out the wrong statement.
  29. An atom bomb works on the principle of
  30. In inventory control theory, the economic order quantity (EOQ) is the