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Mechanical Engineering :: Manufacturing and Production Technology

  1. The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon

  2. A.

     Work material

    B.

     Tool material

    C.

     Working conditions

    D.

     Type of chip produced


  3. In machining metals, chips break due to __________ of work material.

  4. A.

     Toughness

    B.

     Ductility

    C.

     Elasticity

    D.

     Work hardening


  5. As the cutting speed increases, the tool cutting forces

  6. A.

     Remain constant

    B.

     Increases

    C.

     Decreases

    D.

     First increases and then decreases


  7. In which of the following machine, the work rotates and the tool is stationary?

  8. A.

     Vertical boring machine

    B.

     Horizontal boring machine

    C.

     Precision boring machine

    D.

     Jig boring machine


  9. During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be

  10. A.

     Circular Interpolation − clockwise

    B.

     Circular Interpolation − counter clockwise

    C.

     Linear Interpolation

    D.

     Rapid feed


  11. In order to prevent tool from rubbing the work _________ on tools are provided.

  12. A.

     Rake angles

    B.

     Relief angles

    C.

     Face angles

    D.

     None of these


  13. Carbide tipped tools usually have

  14. A.

     Negative rake angle

    B.

     Positive rake angle

    C.

     Any rake angle

    D.

     No rake angle


  15. The advantage of a broaching operation is that

  16. A.

     Rate of production is very high

    B.

     High accuracy and high class of surface finish is possible

    C.

     Roughing and finishing cuts are completed in one pass of the tool

    D.

     All of the above


  17. Shrinkage allowance on pattern is provided to compensate for shrinkage when

  18. A.

     The temperature of liquid metal drops from pouring to freezing temperature

    B.

     The metal changes from liquid to solid state at freezing temperature

    C.

     The temperature of solid phase drops from freezing to room temperature

    D.

     The temperature of metal drops from pouring to room temperature


  19. Hard and tough materials like cast iron should be turned at

  20. A.

     Slow speed

    B.

     High speed

    C.

     Any speed

    D.

     Certain specific speed