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  1. The carbide tools operating at very low cutting speeds (below 30 m/min)

  2. A.

     Reduces tool life

    B.

     Increases tool life

    C.

     Have no effect on tool life

    D.

     Spoils the work piece

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  3. The type of reamer used for reaming operation in a blind hole, is

  4. A.

     Straight fluted reamer

    B.

     Left hand spiral fluted reamer

    C.

     Right hand spiral fluted reamer

    D.

     Any one of these

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  5. Stellite preserves hardness up to a temperature of

  6. A.

     350°C

    B.

     500°C

    C.

     900°C

    D.

     1100°C

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  7. High speed steel tools retain their hardness up to a temperature of

  8. A.

     250°C

    B.

     350°C

    C.

     500°C

    D.

     900°C

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  9. For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of

  10. A.

     50°C

    B.

     100°C

    C.

     175°C

    D.

     275°C

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  11. In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to

  12. A.

     Circular interpolation in counter clockwise direction and incremental dimension

    B.

     Circular interpolation in counter clockwise direction and absolute dimension

    C.

     Circular interpolation in clockwise direction and incremental dimension

    D.

     Circular interpolation in clockwise direction and absolute dimension

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  13. In an interchangeable assembly, shafts of size 25.000 -0.0100⁺⁰∙⁰⁴⁰ mm mate with holes of size 25.000 -0.010⁺⁰∙⁰²⁰ mm. The maximum possible clearance in the assembly will be

  14. A.

     10 microns

    B.

     20 microns

    C.

     30 microns

    D.

     60 microns

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  15. In determining the various forces on the chip, Merchant assumed that the

  16. A.

     Cutting edge of the tool is sharp and it does not make any flank contact with the workpiece

    B.

     Only continuous chip without built-up-edge is produced

    C.

     Cutting velocity remains constant

    D.

     All of the above

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  17. In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is

  18. A.

     Depth of cut

    B.

     Cutting speed

    C.

     Feed

    D.

     Tool rake angle

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  19. The factor responsible for the formation of continuous chips with built up edge is

  20. A.

     Low cutting speed and large rake angle

    B.

     Low cutting speed and small rake angle

    C.

     High cutting speed and large rake angle

    D.

     High cutting speed and small rake angle

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