Fatigue strength can be enhanced through__________________?
Show answer Hide answer
Answer: D. hot working
Explanation
Hot working refines grain structure and heals internal voids, thereby improving mechanical properties and indirectly aiding fatigue resistance.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What factors influence kinematic viscosity__________________?
Show answer Hide answer
Answer: E. density
Kinematic viscosity is defined mathematically as dynamic viscosity divided by fluid density. Changes in fluid density directly alter the calculated kinematic viscosity value. Dividing absolute viscosity by mass density y...
Q2. A basic hole is defined as one where_________________?
Show answer Hide answer
Answer: B. whose lower deviation is zero
A basic hole is defined by international ISO tolerance standards as a hole whose lower deviation is zero. This means the minimum allowable limit of the hole size equals its specified basic nominal diameter. All manufactu...
Q3. Endurance or fatigue limit represents the maximum stress a component withstands for infinite load cycles without failure when subjected to________________?
Show answer Hide answer
Answer: D. completely reversed loading
Fatigue limit testing subjects standard metal specimens to continuous, alternating tension and compression loading cycles. Completely reversed loading creates symmetrical stress swings where peak tensile and compressive...
Q4. 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...
Q5. Cap screws are defined as fasteners that___________________?
Show answer Hide answer
Answer: A. similar to’small size tap bolts except that a greater variety of shapes of heads are available
Cap screws resemble small tap bolts but offer a wider variety of specialized head shapes. They are precision threaded fasteners designed to secure machine components tightly together. Various head designs allow cap screw...
Q6. For steel, the ultimate shear strength relative to ultimate tensile strength is___________________?
Show answer Hide answer
Answer: E. 2/3
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...