Where does structural failure occur when a cantilever beam's end load is increased___________________?
Show answer Hide answer
Answer: D. anywhere
Explanation
Structural failure in a loaded cantilever beam can occur anywhere along its span where the bending moment exceeds the material's capacity. While maximum bending moment concentrates at the fixed support, material defects or section reductions can trigger failure elsewhere. Beam failure mechanics depend on localized stress concentrations, cross-sectional geometry, and material strength variations. A cantilever beam is rigidly fixed at one end and free to support loads at the opposite tip. Bending moment diagrams show that internal stresses reach their peak value right at the fixed wall support. Structural engineering design formulas evaluate both maximum shear force and bending moment across the entire span.
Stating failure occurs only at the tip below the load ignores the fact that bending moments increase toward the support. While bending stresses peak at the support, failure can occur elsewhere if manufacturing defects weaken the span. Claiming failure happens only in the middle incorrectly assumes symmetric simply-supported beam loading conditions.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. A body starts from rest at a constant acceleration of 5 m/s². What distance does it cover in 5 seconds_______________?
Show answer Hide answer
Answer: B. 62.5 m
Using the kinematic equation s equals ut plus half at squared calculates distance. Initial velocity is zero since the body starts from rest in the problem statement. Multiplying half of five acceleration by twenty five s...
Q2. Compared to fire tube boilers, water tube boilers generate steam that_________________?
Show answer Hide answer
Answer: A. can be raised rapidly
Water tube boilers contain water inside small tubes surrounded by hot combustion gases. Small water volumes inside heated tubes allow steam to be raised rapidly. Large heating surface areas enable rapid thermal response...
Q3. How does the presence of non-condensable gases affect the actual condensing pressure relative to the required pressure without them ____________________ ?
Show answer Hide answer
Answer: A. will be higher
The presence of non-condensable gases increases the total condensing pressure in a system. Dalton Law of partial pressures states that total pressure equals the sum of individual gas pressures. Trapped air adds its own p...
Q4. What thermodynamic cycle does a steam engine work on_________________?
Show answer Hide answer
Answer: D. brayton cycle
A steam engine works on the Rankine cycle, which involves the expansion of steam through a piston or turbine.
Q5. What curve shape does a cable assume when subjected to a uniform horizontal load distribution_________________?
Show answer Hide answer
Answer: B. parabola
A flexible cable subjected to a uniform horizontal load distribution assumes a parabolic curve. Suspension bridge cables carrying uniform deck loads approximate this exact geometric shape. Mathematical derivation confirm...
Q6. How is steel produced from phosphatic iron classified_________________?
Show answer Hide answer
Answer: A. brittle
High phosphorus content in iron makes the resulting steel cold-short and brittle. Phosphorus dissolves in ferrite and increases hardness while drastically reducing impact toughness. Phosphoric iron creates steel prone to...