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Mechanical Engineering :: Manufacturing and Production Technology

  1. The primary purpose of a sprue in a casting mould is to

  2. A.

     Feed the casting at a rate consistent with the rate of solidification

    B.

     Act as a reservoir for molten metal

    C.

     Feed molten metal from the pouring basin to the gate

    D.

     Help feed the casting until all solidification takes place

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  3. A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is

  4. A.

     120

    B.

     170

    C.

     180

    D.

     240

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  5. The lip angle of a single point tool is usually

  6. A.

     20° to 40°

    B.

     40° to 60°

    C.

     60° to 80°

    D.

     None of these

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  7. In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called

  8. A.

     Face

    B.

     Fillet

    C.

     Gash

    D.

     Land

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  9. In drilling operation, the metal is removed by

  10. A.

     Shearing

    B.

     Extrusion

    C.

     Shearing and extrusion

    D.

     Shearing and compression

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  11. In ultrasonic machining, the metal is removed by

  12. A.

     Using abrasive slurry between the tool and work

    B.

     Direct contact of tool with the work

    C.

     Maintaining an electrolyte between the work and tool in a very small gap between the two

    D.

     Erosion caused by rapidly recurring spark discharges between the tool and work

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  13. The rear teeth of a broach

  14. A.

     Perform burnishing operation

    B.

     Remove minimum metal

    C.

     Remove maximum metal

    D.

     Remove no metal

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  15. A drill mainly used in drilling brass, copper or softer materials, is

  16. A.

     Flat drill

    B.

     Straight fluted drill

    C.

     Parallel shank twist drill

    D.

     Tapered shank twist drill

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  17. Crater wear leads to

  18. A.

     Increase in cutting temperature

    B.

     Weakening of tool

    C.

     Friction and cutting forces

    D.

     All of these

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  19. Which of the following parameters influence the axial feed rate in centerless grinding?

  20. A.

     Regulating wheel diameter

    B.

     Speed of the regulating wheel

    C.

     Angle between the axes of grinding and regulating wheels

    D.

     All of the above

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