Home / Mechanical Engineering / Manufacturing and Production Technology :: section-1

Mechanical Engineering :: Manufacturing and Production Technology

  1. In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.

  2. A.

     Conventional milling

    B.

     Climb milling

    C.

     Face milling

    D.

     End milling


  3. Which of the following statement is correct for oblique cutting system?

  4. A.

     The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool

    B.

     Frequently, more than one cutting edges are in action

    C.

     The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge

    D.

     All of the above


  5. The depth of cut in drilling is __________ the drill diameter.

  6. A.

     Equal to

    B.

     One-fourth

    C.

     One-half

    D.

     Double


  7. In Oxyacetylene gas welding, temperature at the inner cone of the flame is around

  8. A.

     3500°C

    B.

     3200°C

    C.

     2900°C

    D.

     2550°C


  9. In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is

  10. A.

     Cylindrical grinder

    B.

     Internal grinder

    C.

     Surface grinder

    D.

     Tool and cutter grinder


  11. In a shaper, the length of stroke is increased by

  12. A.

     Increasing the centre distance of bull gear and crank pin

    B.

     Decreasing the centre distance of bull gear and crank pin

    C.

     Increasing the length of the arm

    D.

     Decreasing the length of the slot in the slotted lever


  13. Slow speed of the spindle is necessary in

  14. A.

     Thread cutting

    B.

     Turning a work of larger diameter

    C.

     Turning a hard or tough material

    D.

     All of these


  15. The crystal structure of austenite is

  16. A.

     Body centered cubic

    B.

     Face centered cubic

    C.

     Hexagonal closed packed

    D.

     Body centered tetragonal


  17. The correct sequence of the following parameters in order of their maximum to minimum influence on tool life is

  18. A.

     Feed rate, depth of cut, cutting speed

    B.

     Depth of cut, cutting speed, feed rate

    C.

     Cutting speed, feed rate, depth of cut

    D.

     Feed rate, cutting speed, depth of cut


  19. Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 μm and current flow time of 0.2 second, heat generated during the process will be

  20. A.

     0.2 Joule

    B.

     1 Joule

    C.

     5 Joule

    D.

     1000 Joule