A grinding wheel becomes glazed (i.e. cutting edge takes a glasslike appearance) due to

A. Wear of bond

B. Breaking of abrasive grains

C. Wear of abrasive grains

D. Cracks on grinding wheel

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  1. Allowance in limits and fits refers to
  2. The operation performed on a shaper is
  3. The tap used to cut threads in a blind hole is
  4. For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
  5. In centreless grinding, work place centre will be
  6. The average cutting speed for turning mild steel with a high speed steel tool is
  7. Crater wear occurs mainly on the
  8. Hot rolling of mild steel is carried out
  9. Stellite preserves hardness upto a temperature of
  10. Match the items of List-I (Equipment) with the items of List-II (Process) and select the correct answer…
  11. The cutting angle of a flat drill varies from
  12. The tail stock set over method of taper turning is preferred for
  13. The material property which depends only on the basic crystal structure is
  14. The tailstock set over required to turn a taper on the entire length of a workpiece having diameters…
  15. A lathe with four steps on the cone pulley and with back-gears will have
  16. Trepanning is performed for
  17. The correct sequence of tool materials in increasing order of their ability to retain their hot hardness…
  18. With the same tool life, the maximum material per minute is removed by
  19. Which of the following statement is correct about nose radius?
  20. The vector sum of cutting velocity and chip velocity is __________ shear velocity.
  21. When the shear angle is small
  22. A single point tool has
  23. In drilling aluminium, a drill with
  24. In hot machining, tool is made of
  25. The usual value of the helix angle of a drill is
  26. Gear burnishing is a process for
  27. Trepanning is an operation of
  28. In transverse grinding
  29. The angle formed by the leading edge of the land with a plane having the axis of the drill, is called
  30. The type of tool used on milling machine and broaching machine is