It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be

A. 10 r.p.m.

B. 20 r.p.m.

C. 120 r.p.m.

D. 180 r.p.m.

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Broaching is applied for machining
  2. The angle between the lathe centres is
  3. Internal gear cutting operation can be performed by
  4. The tailstock set over required to turn a taper on the entire length of a workpiece having diameters…
  5. Cutting fluids are used to
  6. The tool made of cemented carbide wear out faster at
  7. What is the type of joining process called, where the parts to be welded are kept in contact and rotated…
  8. An open structure of a grinding wheel is used for
  9. Cold working of steel is defined as working
  10. Carbide tipped tools usually have
  11. If the helix angle of the drill is made _________ 30°, then the torque required to drive the drill…
  12. Chemical milling operation is performed
  13. The snag grinding is done
  14. The type of reamer used for reaming soft aluminium or copper, is
  15. The operation performed on a shaper is
  16. The thrust force will increase with the increase in
  17. In order to prevent tool from rubbing the work _________ on tools are provided.
  18. Side rake angle of a single point cutting tool is the angle
  19. The cutting speed is minimum while machining _________ with a high speed steel tool.
  20. A feed gear box for a screw cutting lathe is designed on the basis of
  21. The hardness of a grinding wheel is specified by
  22. The enlarging of an existing circular hole with a rotating single point tool is called
  23. The actual feed in centerless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions…
  24. The grinding wheel speed (surface speed in m/min) usually varies from
  25. High speed steel cutting tools operate at cutting speeds _________ than carbon steel tools.
  26. The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called
  27. The vector sum of cutting velocity and chip velocity is __________ shear velocity.
  28. An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability…
  29. A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen…
  30. The operation of machining several surfaces of a workpiece simultaneously is called