For steel, the ultimate shear strength relative to ultimate tensile strength is___________________?
Show answer Hide answer
Answer: E. 2/3
Explanation
According to distortion energy yield theories for ductile steels, ultimate shear strength is approximately two-thirds of tensile strength. Shear failure mechanisms require less principal stress energy than direct tensile tearing in ductile metals. Empirical testing of carbon steels consistently confirms that ultimate shear strength is about 0.6 to 0.7 of tensile strength. Ultimate tensile strength measures the maximum stress a material can withstand while being stretched before breaking. Ultimate shear strength measures resistance to forces acting parallel to the plane of the resisting cross section. Machine design calculations use this two-thirds ratio when analyzing torsional shaft failure and fastener shearing.
Options A, B, C, and D propose incorrect fractions that do not align with established metallurgical test data for steel. Option B one-half and option C one-third underestimate the actual shear capacity of engineering steel alloys. Option E two-thirds is the standard theoretical and empirical ratio used for ductile steel components.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Fatigue strength can be enhanced through__________________?
Show answer Hide answer
Answer: D. hot working
Hot working refines grain structure and heals internal voids, thereby improving mechanical properties and indirectly aiding fatigue resistance.
Q2. A tap bolt is characterized as_____________________?
Show answer Hide answer
Answer: B. has head at one end and other end fits into a tapped hole in the other part o be joined
A tap bolt features a conventional bolt head formed on one extremity of the shank. The threaded body screws directly into a pre-tapped hole located in a machine component. This design eliminates the requirement for a sep...
Q3. Coaxing is a procedure aimed at increasing__________________?
Show answer Hide answer
Answer: D. fatigue limit by overstressing the metal by successively increasing loadings
Coaxing is a metallurgical process aimed at increasing the fatigue limit of a metal. It involves initially subjecting the material to low stress cycles below its normal threshold. Gradually increasing the loading over ti...
Q4. Eye bolts find application for_________________?
Show answer Hide answer
Answer: E. lifting and transportation of machines and cubicles
Eye bolts feature a sturdy threaded shank combined with a forged circular loop head on the end. The looped head provides a secure attachment point for crane hooks, shackles, and heavy lifting slings. This design allows w...
Q5. The spring form coefficient represents_____________________?
Show answer Hide answer
Answer: C. its capability of storing energy
The spring form coefficient relates directly to a mechanical spring's geometric parameters and energy storage. It mathematically describes the spring ability to absorb and store potential energy under applied loads. Spri...
Q6. Applying load W instantaneously to a bar induces a stress equal to___________________?
Show answer Hide answer
Answer: A. be independent of ratio of mass of load W to mass of bar (y)
Instantaneous load application generates dynamic stress equivalent to twice the static loading condition. The resulting stress magnitude depends entirely on stiffness and deflection rather than mass ratios. Mass of the s...