The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from

A. 10 to 20 m/min

B. 18 to 30 m/min

C. 24 to 45 m/min

D. 60 to 90 m/min

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  1. A mandrel is used to hold
  2. The enlarging of an existing circular hole with a rotating single point tool is called
  3. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current,…
  4. The in-feed grinding is used to
  5. In up-cut milling the work piece is fed
  6. The operation in which oil is permeated into the pores of a powder metallurgy product is known as
  7. The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value…
  8. If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill…
  9. While current is shut down in the welding circuit, what kind of voltage exists between the output terminals…
  10. The rake angle required to machine brass by high speed steel tool is
  11. In oblique cutting system, the maximum chip thickness
  12. In which of the following machine, the work rotates and the tool is stationary?
  13. When the tool moves parallel to the lathe axis, the movement is termed as
  14. Which type of motor is not used in axis or spindle drives of CNC machine tools?
  15. In an interchangeable assembly, shafts of size 25.000 -0.0100⁺⁰⁰⁴⁰…
  16. Small nose radius
  17. A lathe with four steps on the cone pulley and with back-gears will have
  18. The velocity of tool along the tool face is known as
  19. Glazing in grinding wheels __________ cutting capacity.
  20. In drilling operation, the metal is removed by
  21. The cutting force in punching and blanking operations mainly depends on
  22. Hot rolling of mild steel is carried out
  23. The percentage of carbon in gray cast iron is in the range of
  24. When the cutting edge of the tool is dull, then during machining
  25. The angle between the lathe centres is
  26. When two main plates are kept in alignment butting each other and riveted with cover plate on both sides…
  27. In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done…
  28. For fast removal of materials during grinding, a _________ grinding wheel is used.
  29. Which of the following statement is correct about hot machining?
  30. What is the method of brazing used to join relatively small assemblies made from materials that either…