In drilling Bakelite and fibrous plastics, the point angle of a drill is

A. 90°

B. 118°

C. 135°

D. 150°

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  1. In centreless grinders, the regulating wheel is inclined at
  2. Larger than 15° side cutting edge angle
  3. Tumbler gears in lathe are used to
  4. The surface finish is improved by the increase in
  5. For harder alloy steel, the point angle of the drill is kept
  6. The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
  7. The cutting angle of a flat drill varies from
  8. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness…
  9. The chuck used for setting up of heavy and irregular shaped work should be
  10. An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability…
  11. The factor responsible for the formation of discontinuous chips is
  12. Flank wear depends upon the
  13. Hot rolling of mild steel is carried out
  14. The broaching operation in which either the work or the tool moves across the other, is known as
  15. In which of the following milling machine, the table can be tilted in a vertical plane by providing…
  16. Lathe bed is made of
  17. If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch…
  18. The cutting force in up milling __________ per tooth movement of the cutter.
  19. In a shaper, the length of stroke is increased by
  20. The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably…
  21. The method of centre less grinding used to produce taper is
  22. Cold working of steel is defined as working
  23. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is…
  24. The operation in which oil is permeated into the pores of a powder metallurgy product is known as
  25. The type of reamer used for reaming soft aluminium or copper, is
  26. The chuck preferred for quick setting and accurate centering of a job is
  27. In reaming process
  28. Which type of motor is not used in axis or spindle drives of CNC machine tools?
  29. Negative rakes are used for
  30. The tailstock set over required to turn a taper on the entire length of a workpiece having diameters…