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The operation of smoothing and squaring the surface around a hole is known as

A. Counter-sinking

B. Counter-boring

C. Trepanning

D. Spot facing

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  1. During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion…
  2. The cutting speed is minimum while machining _________ with a high speed steel tool.
  3. In up milling, the thickness of chip is
  4. In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
  5. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides…
  6. The percentage of carbon in gray cast iron is in the range of
  7. The type of tool used on lathe, shaper and planer is
  8. In ECM, the material removal is due to
  9. The tool material, for faster machining, should have
  10. A mandrel is used to hold
  11. Which of the following statement is correct regarding grinding of high carbon steel?
  12. If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten…
  13. Hard and tough materials like cast iron should be turned at
  14. Crater wear is mainly due to the phenomenon known as
  15. Hardness of green sand mould increases with
  16. In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to…
  17. Which of the following statement is wrong?
  18. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen…
  19. The lead screw of a lathe has _________ threads.
  20. The chuck used for setting up of heavy and irregular shaped work should be
  21. A drill considered as a cutting tool having zero rake, is known as a
  22. Ceramic tools are fixed to tool body by
  23. The relief or clearance at the cutting edge of a flat drill varies from
  24. Cast iron during machining produces
  25. In lapping operation, the amount of metal removed is
  26. Chip breakers are used to
  27. The negative rake is usually provided on
  28. In electro-discharge machining, dielectric is used to
  29. The parameter which completely defines the chip formation in a metal cutting process is
  30. Soft materials can not be economically ground due to