Discussion
Consider the following statements about a hollow versus a solid circular shaft:
1. For the same weight the hollow shaft is stiffer in torsion.
2. Material near the axis contributes little to torsional stiffness.
3. The hollow shaft carries uniform shear stress across its wall.
Which of the statements given above is or are correct?
Answer: D
Correct answer: 1 and 2 only
Statements 1 and 2 are correct and they are the same fact from two sides: shear stress and hence the contribution to stiffness grow with radius, so material near the axis earns little and is better placed at the outside. Statement 3 is an approximation rather than a truth - the stress still varies linearly across the wall, and only for a thin wall is it nearly uniform.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development