GATE Exam > GATE Questions > In a rolling process, a sheet of 25 mm thick...
Start Learning for Free
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?
- a)54.77 m
- b)54.77 mm
- c)5.477 mm
- d)5477 m
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm t...
Initial thickness
h1 = 25 mm
Final thickness
h2 = 20 mm
Roll diameter = 1200 mm
Speed of rolls = 100 RPM
As we know that contact length of roll strip is given by
Where R = roll radius = 1200/2 = 600 mm
And Δh =
h1-h2 = (25 – 20) = 5 mm
Put these values we have
L = 54.77 mm
Most Upvoted Answer
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm t...
Understanding the Rolling Process
In a rolling process, the contact length between the rolls and the material being processed is crucial for understanding the deformation and material flow.
Given Data:
- Initial Thickness (h1): 25 mm
- Final Thickness (h2): 20 mm
- Roll Diameter (D): 1200 mm
- Roll Radius (R): D/2 = 600 mm
- Roll Speed (N): 100 rpm
Contact Length Calculation:
To find the contact length (L) between the roll and the sheet during rolling, we can use the following relationship:
- The contact length can be approximated by the formula:
L = π * R * (h1 - h2) / (h1 + h2)
This formula is derived from the geometry of the rolling process, taking into account the reduction in thickness due to the rolling.
Substituting Values:
1. Calculate the average thickness:
- Average Thickness = (h1 + h2) / 2 = (25 mm + 20 mm) / 2 = 22.5 mm
2. Use the formula for contact length:
- L = π * 600 mm * (25 mm - 20 mm) / (25 mm + 20 mm)
- L = π * 600 mm * (5 mm) / (45 mm)
3. Simplifying this gives:
- L ≈ 54.77 mm
Conclusion:
Thus, the roll strip contact length during the rolling process is approximately 54.77 mm. This means that the correct answer is option 'B'.
In a rolling process, the contact length between the rolls and the material being processed is crucial for understanding the deformation and material flow.
Given Data:
- Initial Thickness (h1): 25 mm
- Final Thickness (h2): 20 mm
- Roll Diameter (D): 1200 mm
- Roll Radius (R): D/2 = 600 mm
- Roll Speed (N): 100 rpm
Contact Length Calculation:
To find the contact length (L) between the roll and the sheet during rolling, we can use the following relationship:
- The contact length can be approximated by the formula:
L = π * R * (h1 - h2) / (h1 + h2)
This formula is derived from the geometry of the rolling process, taking into account the reduction in thickness due to the rolling.
Substituting Values:
1. Calculate the average thickness:
- Average Thickness = (h1 + h2) / 2 = (25 mm + 20 mm) / 2 = 22.5 mm
2. Use the formula for contact length:
- L = π * 600 mm * (25 mm - 20 mm) / (25 mm + 20 mm)
- L = π * 600 mm * (5 mm) / (45 mm)
3. Simplifying this gives:
- L ≈ 54.77 mm
Conclusion:
Thus, the roll strip contact length during the rolling process is approximately 54.77 mm. This means that the correct answer is option 'B'.
|
Explore Courses for GATE exam
|
|
Similar GATE Doubts
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer?
Question Description
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer?.
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer?.
Solutions for In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for GATE.
Download more important topics, notes, lectures and mock test series for GATE Exam by signing up for free.
Here you can find the meaning of In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice In a rolling process, a sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 1200 mm and it rotates at 100 rpm. What is the roll strip contact length?a)54.77 mb)54.77 mmc)5.477 mmd)5477 mCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice GATE tests.
|
|
Explore Courses for GATE exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup