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To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is
[PI 2011]
- a)33.336
- b)30.397
- c)29.366
- d)26.397
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
To measure the effective diameter of an external metric thread (includ...
°), follow these steps:
1. Use a caliper to measure the major diameter of the thread (the widest point across the crests of the thread).
2. Subtract the pitch (distance between adjacent threads) from the major diameter to get the minor diameter (the narrowest point across the roots of the thread).
3. Add the pitch to the major diameter to get the effective diameter (the average diameter across the tops of the threads).
4. Alternatively, you can use the following formula to calculate the effective diameter:
Effective diameter = major diameter - 0.6495 x pitch
Example: Let's say you have an external metric thread with a major diameter of 10 mm and a pitch of 1.5 mm.
Minor diameter = major diameter - pitch = 10 - 1.5 = 8.5 mm
Effective diameter = major diameter + pitch = 10 + 1.5 = 11.5 mm
Effective diameter (using formula) = 10 - 0.6495 x 1.5 = 9.625 mm
Therefore, the effective diameter of the external metric thread is approximately 11.5 mm or 9.625 mm.
1. Use a caliper to measure the major diameter of the thread (the widest point across the crests of the thread).
2. Subtract the pitch (distance between adjacent threads) from the major diameter to get the minor diameter (the narrowest point across the roots of the thread).
3. Add the pitch to the major diameter to get the effective diameter (the average diameter across the tops of the threads).
4. Alternatively, you can use the following formula to calculate the effective diameter:
Effective diameter = major diameter - 0.6495 x pitch
Example: Let's say you have an external metric thread with a major diameter of 10 mm and a pitch of 1.5 mm.
Minor diameter = major diameter - pitch = 10 - 1.5 = 8.5 mm
Effective diameter = major diameter + pitch = 10 + 1.5 = 11.5 mm
Effective diameter (using formula) = 10 - 0.6495 x 1.5 = 9.625 mm
Therefore, the effective diameter of the external metric thread is approximately 11.5 mm or 9.625 mm.
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To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. Can you explain this answer?
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To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. 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 To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. 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 To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. Can you explain this answer?.
To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. 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 To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. 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 To measure the effective diameter of an external metric thread (included angle is 60°) of 3.5 mm pitch, a cylindrical standard of 30.5 mm diameter and two wires of 2 mm diameter each are used. The micrometer reading over the standard and over the wires are 16.532 mm and 15.398 mm respectively. The effective diameter (in mm) of the thread is[PI 2011]a)33.336b)30.397c)29.366d)26.397Correct answer is option 'B'. Can you explain this answer?.
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