Materials Science and Manufacturing Engineering Miscellaneous


Materials Science and Manufacturing Engineering Miscellaneous

Materials Science and Manufacturing Engineering

  1. Increase in rake angle causes... (A)... in chip thickness and ...(B)... in shear angle









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    Reduction in chip thickness and increase in shear angle. Because FT, thrust force is decreasing in nature.

    Correct Option: A

    Reduction in chip thickness and increase in shear angle. Because FT, thrust force is decreasing in nature.


  1. The base of a brass bracket has to be rough ground to remove the unevenness. The 4 wheels available in the store. The appropriate wheel is









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    Correct Option: A



  1. The base of a brass bracket has to be rough ground to remove the unevenness. The 4 wheels available in the store. The appropriate wheel is









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    Correct Option: A


  1. A milling cutter having 8 teeth is rotating at 100 rpm. The workpiece feed is set at 40 mm/ min the feed per tooth is









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    Z = teeth table feed = 40 mm/ min , N = 100 rpm

    ft =
    F
    =
    40
    = 0.05 mm
    ZN8 × 100

    Correct Option: C

    Z = teeth table feed = 40 mm/ min , N = 100 rpm

    ft =
    F
    =
    40
    = 0.05 mm
    ZN8 × 100



  1. The diameter and rotational speed of a job are 100 m and 500 rpm respectively. The high spots (chatter marks) are found at a spacing of 30 deg on the job surface. The chatter frequency is









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    Chatter in every 30°.
    So 12 chatter mark in one revolution.

    → 500 rpm =
    500
    = 8.33 rps
    60

    ⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)
    ⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)

    Correct Option: C

    Chatter in every 30°.
    So 12 chatter mark in one revolution.

    → 500 rpm =
    500
    = 8.33 rps
    60

    ⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)
    ⇒ Frequency = 12 × 8.33 = 100 Hz (cycle/sec)