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Drills are usually made of

A. Cermets

B. High speed steel

C. Alloy steel

D. Tungsten carbide

Related Questions

  1. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same…
  2. Powder metallurgy technique is used in the production of __________ tools.
  3. The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.
  4. Which of the following can be manufactured using powder metallurgy techniques?
  5. Which of the following is not the function of a volute casing provided in a centrifugal pump?
  6. A jig is used while __________ a hole.
  7. Otto cycle used in spark ignition petrol engines is also known as the constant __________ cycle.
  8. Normalising of an object does not
  9. The elastic strain in copper is due to the
  10. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________…
  11. Load cells used for the measurement of weight has
  12. Powder metallurgy process does not make metal powder by
  13. CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because…
  14. Fire in fuel gas pipelines is extinguished most effectively by
  15. The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is
  16. Heat transfer by __________ is almost absent in case of fluidised bed drying operation.
  17. Electrolytic reduction cell used for conversion of calcined Al2O3 to Al is a carbon lined furnace operating…
  18. Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
  19. Preheating before welding is done to
  20. The most suitable material for die casting is
  21. A jet engine turbine blade is normally manufactured by
  22. Notched bar test is used for testing the __________ of a material.
  23. Rain drops falling through atmospheric air attain limited terminal velocity, because of
  24. Pick out the wrong statement.
  25. __________ is the trade name assigned to a nonferrous cast alloy composed of cobalt, chromium & tungsten.
  26. __________ iron is produced by the annealing of white cast iron.
  27. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
  28. Corona discharge is related to the operation of a/an
  29. Shaft/rotor speed is most accurately measured by a
  30. Window panes of aeroplanes are normally made of

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