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Assertion (A): Single start threads are used for fastening purposes.
Reason (R): Single start threads are easier to produce in a lathe.
Reason (R): Single start threads are easier to produce in a lathe.
[PI 1990]
- a)Both A and R are true and R is the correct explanation of A
- b)Both A and R are true but R is not a correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'B'. Can you explain this answer?
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Assertion (A): Single start threads are used for fastening purposes.Re...
Single start thread on be made by single point cutting tool.
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Assertion (A): Single start threads are used for fastening purposes.Re...
Assertion (A): Single start threads are used for fastening purposes.
Reason (R): Single start threads are easier to produce in a lathe.
The correct answer is option 'B' - Both A and R are true but R is not a correct explanation of A.
Explanation:
Single Start Threads for Fastening Purposes:
- A single start thread refers to a thread that starts from the beginning and runs to the end of the threaded part in a single continuous helical path.
- Single start threads are commonly used for fastening purposes, such as in screws, bolts, and nuts.
- These threads provide a secure and strong connection between two components when fastened together.
- The single start thread design ensures efficient transfer of force and torque, making it suitable for applications where fastening is required.
Ease of Production in a Lathe:
- A lathe is a machine tool that is commonly used for machining cylindrical workpieces.
- Threads can be produced on a lathe using various methods, such as thread cutting, thread chasing, and thread milling.
- Single start threads are relatively easier to produce in a lathe compared to multi-start threads.
- The process of cutting single start threads involves setting up the lathe with the appropriate cutting tool, selecting the correct pitch, and controlling the feed and depth of cut to achieve the desired thread geometry.
- The simplicity of producing single start threads in a lathe makes it a preferred choice for many manufacturing processes.
Explanation of the Correct Answer:
- Both Assertion (A) and Reason (R) are true.
- Single start threads are indeed used for fastening purposes, as explained above.
- The Reason (R), stating that single start threads are easier to produce in a lathe, is also true.
- However, the Reason (R) is not a correct explanation of Assertion (A).
- While it is true that single start threads are easier to produce in a lathe, it does not directly explain why they are used for fastening purposes.
- The use of single start threads for fastening purposes is primarily based on their mechanical characteristics and suitability for creating secure connections.
- Therefore, both statements are true, but the Reason does not provide a correct explanation for the Assertion.
Reason (R): Single start threads are easier to produce in a lathe.
The correct answer is option 'B' - Both A and R are true but R is not a correct explanation of A.
Explanation:
Single Start Threads for Fastening Purposes:
- A single start thread refers to a thread that starts from the beginning and runs to the end of the threaded part in a single continuous helical path.
- Single start threads are commonly used for fastening purposes, such as in screws, bolts, and nuts.
- These threads provide a secure and strong connection between two components when fastened together.
- The single start thread design ensures efficient transfer of force and torque, making it suitable for applications where fastening is required.
Ease of Production in a Lathe:
- A lathe is a machine tool that is commonly used for machining cylindrical workpieces.
- Threads can be produced on a lathe using various methods, such as thread cutting, thread chasing, and thread milling.
- Single start threads are relatively easier to produce in a lathe compared to multi-start threads.
- The process of cutting single start threads involves setting up the lathe with the appropriate cutting tool, selecting the correct pitch, and controlling the feed and depth of cut to achieve the desired thread geometry.
- The simplicity of producing single start threads in a lathe makes it a preferred choice for many manufacturing processes.
Explanation of the Correct Answer:
- Both Assertion (A) and Reason (R) are true.
- Single start threads are indeed used for fastening purposes, as explained above.
- The Reason (R), stating that single start threads are easier to produce in a lathe, is also true.
- However, the Reason (R) is not a correct explanation of Assertion (A).
- While it is true that single start threads are easier to produce in a lathe, it does not directly explain why they are used for fastening purposes.
- The use of single start threads for fastening purposes is primarily based on their mechanical characteristics and suitability for creating secure connections.
- Therefore, both statements are true, but the Reason does not provide a correct explanation for the Assertion.
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Assertion (A): Single start threads are used for fastening purposes.Reason (R): Single start threads are easier to produce in a lathe.[PI 1990]a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?
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Assertion (A): Single start threads are used for fastening purposes.Reason (R): Single start threads are easier to produce in a lathe.[PI 1990]a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect 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 Assertion (A): Single start threads are used for fastening purposes.Reason (R): Single start threads are easier to produce in a lathe.[PI 1990]a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect 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 Assertion (A): Single start threads are used for fastening purposes.Reason (R): Single start threads are easier to produce in a lathe.[PI 1990]a)Both A and R are true and R is the correct explanation of Ab)Both A and R are true but R is not a correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?.
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