In metal machining, the work-tool contact zone is a zone where heat is generated due to

A. Plastic deformation of metal

B. Burnishing friction

C. Friction between the moving chip and the tool face

D. None of the above

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  1. In a centre lathe, the cutting tool is fed in _________ with reference to the lathe axis.
  2. In order to obtain a surface finish in the range of 0.75 μm to 1.25 μm , the operation used…
  3. The tool material, for faster machining, should have
  4. The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value…
  5. Gear burnishing is a process for
  6. The relief or clearance at the cutting edge of a flat drill varies from
  7. A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2mm depth by a cutter of…
  8. For generating a Coons surface we require
  9. What is the type of welding defect caused due to poor deposition of weld rod is called?
  10. Climb milling is chosen while machining because
  11. In ECM, the material removal is due to
  12. The cutting speed is minimum while machining _________ with a high speed steel tool.
  13. Soft materials can not be economically ground due to
  14. The high cutting speed and large rake angle of the tool will result in the formation of
  15. Ceramic tools are fixed to tool body by
  16. In which of the following machine, the work remains stationary and the tool is rotated?
  17. The broaching operation in which the work moves past the stationary tool is called
  18. Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm…
  19. In order to have interference fit, it is essential that the lower limit of the shaft should be
  20. In a shaper, the metal is removed during
  21. The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
  22. Threading is an operation of
  23. In lapping operation, the amount of metal removed is
  24. The advantage of a broaching operation is that
  25. A drill mainly used in drilling brass, copper or softer materials, is
  26. Which of the following statement is correct for oblique cutting system?
  27. When the cutting edge of the tool is dull, then during machining
  28. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current,…
  29. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
  30. The taper on the lathe spindle is