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A copper strip of 200mm width and 30mm thickness is to be rolled to a thickness of 25mm. The roll of radius 300mm rotates at 100rpm. The average shear strength of the work material is 180Mpa. The roll strip contact length and the roll force are
  • a)
    15.8mm & 0.569MN
  • b)
    18.97mm & 0.683MN
  • c)
    38.73mm & 1.395MN
  • d)
    38.73mm & 2.09MN
Correct answer is option 'C'. Can you explain this answer?
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To find the roll strip contact length, we can use the formula:

Contact Length = π * (Roll Radius + Thickness of Strip) * (Roll Radius - Thickness of Strip)

Substituting the given values:

Contact Length = π * (300mm + 30mm) * (300mm - 30mm)
Contact Length = π * 330mm * 270mm
Contact Length ≈ 279,252mm ≈ 279.25mm (rounded to two decimal places)

To find the roll force area, we can use the formula:

Roll Force Area = Contact Length * Strip Width

Substituting the given values:

Roll Force Area = 279.25mm * 200mm
Roll Force Area = 55,850mm² ≈ 55.85cm² (rounded to two decimal places)
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A copper strip of 200mm width and 30mm thickness is to be rolled to a thickness of 25mm. The roll of radius 300mm rotates at 100rpm. The average shear strength of the work material is 180Mpa. The roll strip contact length and the roll force area)15.8mm & 0.569MNb)18.97mm & 0.683MNc)38.73mm & 1.395MNd)38.73mm & 2.09MNCorrect answer is option 'C'. Can you explain this answer?
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A copper strip of 200mm width and 30mm thickness is to be rolled to a thickness of 25mm. The roll of radius 300mm rotates at 100rpm. The average shear strength of the work material is 180Mpa. The roll strip contact length and the roll force area)15.8mm & 0.569MNb)18.97mm & 0.683MNc)38.73mm & 1.395MNd)38.73mm & 2.09MNCorrect answer is option 'C'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about A copper strip of 200mm width and 30mm thickness is to be rolled to a thickness of 25mm. The roll of radius 300mm rotates at 100rpm. The average shear strength of the work material is 180Mpa. The roll strip contact length and the roll force area)15.8mm & 0.569MNb)18.97mm & 0.683MNc)38.73mm & 1.395MNd)38.73mm & 2.09MNCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A copper strip of 200mm width and 30mm thickness is to be rolled to a thickness of 25mm. The roll of radius 300mm rotates at 100rpm. The average shear strength of the work material is 180Mpa. The roll strip contact length and the roll force area)15.8mm & 0.569MNb)18.97mm & 0.683MNc)38.73mm & 1.395MNd)38.73mm & 2.09MNCorrect answer is option 'C'. Can you explain this answer?.
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