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Mechanical Engineering :: Manufacturing and Production Technology

  1. The lathe centres are provided with standard taper known as

  2. A.

     Morse taper

    B.

     Seller's taper

    C.

     Chapman taper

    D.

     Brown and Sharpe taper

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  3. In ECM, the material removal is due to

  4. A.

     Corrosion

    B.

     Erosion

    C.

     Fusion

    D.

     Ion displacement

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  5. The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are

  6. A.

     1, 2, 2

    B.

     1, 2, 4

    C.

     2, 3, 4

    D.

     2, 4, 4

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  7. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

  8. A.

     Increases continuously

    B.

     Decreases continuously

    C.

     Decreases becomes stable and then increases

    D.

     Increases, becomes stable and then decreases

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  9. Twist drills are made of

  10. A.

     High speed steel

    B.

     Carbon steel

    C.

     Stainless steel

    D.

     Either (A) or (B)

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

  12. 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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  13. The cutting speed for drilling copper with high speed steel drills varies from

  14. 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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  15. Discontinuous chips are formed during machining of

  16. A.

     Brittle metals

    B.

     Ductile metals

    C.

     Hard metals

    D.

     Soft metals

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  17. Continuous chips with built up edge are formed during machining of

  18. A.

     Brittle metals

    B.

     Ductile metals

    C.

     Hard metals

    D.

     Soft metals

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  19. The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called

  20. A.

     Profile milling

    B.

     Gang milling

    C.

     Saw milling

    D.

     Helical milling

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