Twist drills are made of

A. High speed steel

B. Carbon steel

C. Stainless steel

D. Either (A) or (B)

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  1. In electro-discharge machining, dielectric is used to
  2. For turning small taper on long workpiece, the suitable method is
  3. While current is shut down in the welding circuit, what kind of voltage exists between the output terminals…
  4. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen…
  5. The size of a lathe is specified by the
  6. The usual value of the helix angle of a drill is
  7. The cutting speed is maximum while machining __________ with a high speed steel tool.
  8. A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged.
  9. A bottoming tap has
  10. The cutting fluid mostly used for machining alloy steels is
  11. Negative rakes are used for
  12. Internal gear cutting operation can be performed by
  13. The angle between the shear plane and __________ is called shear angle.
  14. The factor which affects the tool life is
  15. The enlarging of an existing circular hole with a rotating single point tool is called
  16. The tail stock set over method of taper turning is preferred for
  17. The angle between the lathe centres is
  18. As tool and work are not in contact in EDM process
  19. Which of the following operation is first performed?
  20. The swing diameter over the bed is ________ the height of the centre measured from the bed of the lathe.
  21. Small nose radius
  22. In which of the following machine, the work remains stationary and the tool is rotated?
  23. The abrasive recommended for grinding materials of high tensile strength is
  24. It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece.…
  25. Which of the following statement is wrong?
  26. The lip angle of a single point tool is usually
  27. The material property which depends only on the basic crystal structure is
  28. The method of grinding used to produce internal cylindrical holes and tapers, is
  29. A better machinable metal is one which gives
  30. The effect of setting a boring tool above centre height leads to