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Mechanical Engineering :: Manufacturing and Production Technology

  1. A mandrel is used to hold

  2. A.

     An eccentric work

    B.

     A heavy work

    C.

     A thin work

    D.

     None of these


  3. The tool may fail due to

  4. A.

     Cracking at the cutting edge due to thermal stresses

    B.

     Chipping of the cutting edge

    C.

     Plastic deformation of the cutting edge

    D.

     All of these


  5. The chamfering is an essential operation after

  6. A.

     Knurling

    B.

     Rough turning

    C.

     Boring

    D.

     Thread cutting


  7. Tumbler gears in lathe are used to

  8. A.

     Reduce the spindle speed

    B.

     Cut gears

    C.

     Give desired direction of movement to the lathe carriage

    D.

     Drill a workpiece


  9. Hardness of green sand mould increases with

  10. A.

     Increase in moisture content beyond 6 percent

    B.

     Increase in permeability

    C.

     Decrease in permeability

    D.

     Increase in both moisture content and permeability


  11. Green sand mould indicates that

  12. A.

     Polymeric mould has been cured

    B.

     Mould has been totally dried

    C.

     Mould is green in colour

    D.

     Mould contains moisture


  13. What is the type of welding defect caused due to poor deposition of weld rod is called?

  14. A.

     Porosity

    B.

     Undercut

    C.

     Under fill

    D.

     Crack


  15. A single point tool has

  16. A.

     Rake angle

    B.

     Cutting angle

    C.

     Lip angle

    D.

     All of these


  17. A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is

  18. A.

     0.2 mm

    B.

     10 mm

    C.

     20 mm

    D.

     100 mm


  19. An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is

  20. A.

     Cutting speed

    B.

     Feed rate

    C.

     Shear angle

    D.

     Tool geometry