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The tool life in case of a grinding wheel is the time

A. Between two successive regrinds of the wheel

B. Taken for the wheel to be balanced

C. Taken between two successive wheel dressings

D. Taken for a wear of 1 mm on its diameter

Correct Answer : C.


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  1. Which of the following engineering materials is the most suitable candidate for hot chamber die casting?
  2. Continuous chips with built up edge are formed during machining of
  3. In machining metals, surface roughness is due to
  4. A single point tool has
  5. The chamfering is an operation of
  6. The addition of lead, sulphur and phosphorus to low carbon steels, help to
  7. The tool life is affected by
  8. When the cutting edge of the tool is dull, then during machining
  9. Friction at the tool-chip interface can be reduced by
  10. The helix angle of a drill is __________ for drilling brass.
  11. Internal gear cutting operation can be performed by
  12. Trepanning is an operation of
  13. The type of reamer used for reaming operation in a blind hole, is
  14. In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is
  15. In a planer
  16. A process of removing metal by pushing or pulling a cutting tool is called
  17. The angle between the shear plane and __________ is called shear angle.
  18. Which of the following statement is correct for oblique cutting system?
  19. The factor responsible for the formation of discontinuous chips is
  20. In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to…
  21. The tool material, for faster machining, should have
  22. Glazing in grinding wheels can be decreased by
  23. The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
  24. The usual value of the point angle of a drill is
  25. In drilling operation, the metal is removed by
  26. Gear finishing operation is called
  27. The factor considered for evaluation of machinability is
  28. Shrinkage allowance on pattern is provided to compensate for shrinkage when
  29. Which of the following operation is first performed?
  30. The type of reamer used for reaming soft aluminium or copper, is