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The main purpose of spheroidising treatment is to improve

A. Hardenability of low carbon steels

B. Machinability of low carbon steels

C. Hardenability of high carbon steels

D. Machinability of high carbon steels

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  1. In metal machining, the zone where the heat is generated due to friction between the moving chip and…
  2. In hot machining, the work is heated by
  3. The tail stock set over method of taper turning is preferred for
  4. The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
  5. The average cutting speed for turning brass with a high speed steel tool is
  6. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides…
  7. The operation performed on a shaper is
  8. The ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter…
  9. The in-feed grinding is used to
  10. For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is
  11. In electro discharge machining, tool is made of
  12. Glazing in grinding wheels takes place when the
  13. Slow speed of the spindle is necessary in
  14. Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling…
  15. Internal gear cutting operation can be performed by
  16. If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill…
  17. The stroke of a shaping machine is 250 mm. It makes 30 double strokes per minute. The overall average…
  18. Segmental chips are formed during machining
  19. In down milling, the thickness of chip is
  20. Tumbler gears in lathe are used to
  21. Hardness of green sand mould increases with
  22. A dynamometer is a device used for the measurement of
  23. During normalizing process of steel, the specimen is heated
  24. Which of the following statement is wrong?
  25. Which one among the following welding processes uses nonconsumable electrode?
  26. Hard and tough materials like cast iron should be turned at
  27. Internal or external threads of different pitches can be produced by
  28. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen…
  29. Which of the following statement is correct for orthogonal cutting system?
  30. Quality screw threads are produced by