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Mechanical Engineering :: Production Engineering

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

  2. A.
    remain constant
    B.
    increases
    C.
    decreases
    D.
    first increases and then decreases

  3. Crater wear leads to

  4. A.
    increase in cutting temperature
    B.
    weakening of tool
    C.
    friction and cutting forces
    D.
    all of these

  5. The addition of lead, sulphur and phosphorus to low carbon steels, help to

  6. A.
    reduce built up edge
    B.
    break up chips
    C.
    improve machinability
    D.
    all of these

  7. The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant)

  8. A.
    VnT = C
    B.
    VTn = C
    C.
    Vn/T = C
    D.
    V/Tn = C

  9. The width of cutting edge of a parting-off tool varies from

  10. A.
    3 to 12 mm
    B.
    5 to 20 mm
    C.
    8 to 30 mm
    D.
    15 to 40 mm

  11. The grinding of long, slender shafts or bars is usually done by

  12. A.
    infeed grinding
    B.
    through feed grinding
    C.
    endfeed grinding
    D.
    any one of these

  13. In centreless grinding, work place centre will be

  14. A.
    above the line joining the two wheel centres
    B.
    below the line joining the two wheel centres
    C.
    on the line joining the two wheel centres
    D.
    at the intersection of the line joining the wheel centres with the work place plane

  15. Tool life is measured by the

  16. A.
    number of pieces machined between tool sharpenings
    B.
    time the tool is in contact with the job
    C.
    volume of material removed between tool sharpenings
    D.
    all of the above

  17. Soft materials can not be economically ground due to

  18. A.
    high temperature involved
    B.
    frequent wheel clogging
    C.
    rapid wheel wear
    D.
    low work piece stiffness

  19. The process of removing metal by a cutter which is rotated in the same direction of travel of workpiece, is called

  20. A.
    up milling
    B.
    down milling
    C.
    face milling
    D.
    end milling