The ductile materials, during machining, produce

A. Continuous chips

B. Discontinuous chips

C. Continuous chips with built up edge

D. Either (A) or (C)

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  1. What is the type of welding defect is caused due to stresses on heating and cooling called?
  2. Relief angles on high speed steel tools usually vary from
  3. An expendable pattern is used in
  4. In drilling aluminium, a drill with
  5. The tool may fail due to
  6. The tool made of cemented carbide wear out faster at
  7. A right hand tool on a lathe cuts most efficiently when it travels
  8. The obtuse angle, included between the chisel edge and the lip as viewed from the end of a drill, is…
  9. Slow speed of the spindle is necessary in
  10. The abrasive recommended for grinding materials of high tensile strength is
  11. The usual value of the helix angle of a drill is
  12. If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill…
  13. The size of abrasive grain required in a grinding wheel depends upon the
  14. In a plain milling machine, the table can be moved
  15. The percentage of carbon in gray cast iron is in the range of
  16. The tool life in case of a grinding wheel is the time
  17. Discontinuous chips are formed during machining of
  18. The hardness of a grinding wheel is determined by the
  19. In drilling operation, the metal is removed by
  20. Which of the following parameters govern the value of shear angle in continuous chip formation?
  21. Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm…
  22. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen…
  23. Trepanning is an operation of
  24. The cutting force in up milling __________ per tooth movement of the cutter.
  25. In order to grind soft material
  26. A drill mainly used in drilling brass, copper or softer materials, is
  27. In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to…
  28. The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions…
  29. Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known…
  30. The addition of lead, sulphur and phosphorus to low carbon steels, help to