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Mechanical Engineering :: Manufacturing and Production Technology

  1. The silicon carbide abrasive is chiefly used for grinding

  2. A.

     Cemented carbide

    B.

     Ceramic

    C.

     Cast iron

    D.

     All of these

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  3. Relief angles on high speed steel tools usually vary from

  4. A.

     0° to 3°

    B.

     3° to 10°

    C.

     10° to 20°

    D.

     20° to 30°

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  5. Which of the following statement is correct about EDM machining?

  6. A.

     It can machine hardest materials

    B.

     It produces high degree of surface finish

    C.

     The tool and work are never in contact with each other

    D.

     All of these

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  7. Which of the following statement is correct about hot machining?

  8. A.

     It requires less power than machining metals at room temperature.

    B.

     The rate of tool wear is lower.

    C.

     It is used for machining high strength and high temperature resistant materials.

    D.

     All of the above

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  9. With the same tool life, the maximum material per minute is removed by

  10. A.

     Increasing the cutting speed

    B.

     Decreasing the cutting speed

    C.

     Increasing the depth of cut

    D.

     Increasing the feed rate

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  11. Larger than 15° side cutting edge angle

  12. A.

     Increases tool life

    B.

     Decreases tool life

    C.

     Produces chipping and decreases tool life

    D.

     Results in excessive stress concentration and greater heat generation

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  13. The parameter which completely defines the chip formation in a metal cutting process is

  14. A.

     Shear angle

    B.

     Chip-tool contact length

    C.

     Both (A) and (B)

    D.

     None of these

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  15. The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service is known as?

  16. A.

     Weldment

    B.

     Weld tab

    C.

     Weldability

    D.

     Tack weld

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  17. The tool life in case of a grinding wheel is the time

  18. A.

     Between two successive regrinds of the wheel

    B.

     Taken for the wheel to be balanced

    C.

     Taken between two successive wheel dressings

    D.

     Taken for a wear of 1 mm on its diameter

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  19. A dense structure of a grinding wheel is used for

  20. A.

     Hard materials

    B.

     Brittle materials

    C.

     Finishing cuts

    D.

     All of these

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