Do wire rope constructions always require a central core________________?
Show answer Hide answer
Answer: A. yes
Explanation
Standard wire rope designs incorporate a central core to support the surrounding outer strands. The core maintains the geometric shape of the rope under heavy tensile loading conditions. Without a central core, individual strands would crush inward and damage each other. Wire ropes are complex machine elements made of multiple steel wires wound into strands. Cores can be constructed from natural fibers, synthetic polymers, or independent wire rope strands. The core also acts as a reservoir for lubricating oil to reduce internal friction.
Wire ropes are essential components in cranes, elevators, suspension bridges, and mining hoists. Selecting the correct core type depends on operational crushing loads and ambient temperature limits. Regular lubrication of the core prevents internal corrosion and extends operational service life. Wire rope constructions never omit a central core because structural stability requires internal support. Claiming ropes sometimes or rarely need a core contradicts established rigging manufacturing standards. Omitting the core would cause the outer steel strands to collapse under minimal working tension.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What factor is applied to carbon steel's flexure endurance limit to find its shear endurance limit____________?
Show answer Hide answer
Answer: E. 0.75
The shear endurance limit of carbon steel is derived by scaling its flexure endurance limit value. Empirical testing shows that torsional shear fatigue strength is lower than bending fatigue strength. Multiplying the fle...
Q2. A turnbuckle mechanism incorporates____________________?
Show answer Hide answer
Answer: C. left hand threads on one end and right hand threads on other end
A turnbuckle is a mechanical device used to adjust tension or length in tie rods and cables easily. It features a central frame body with internal threaded ends matching two opposing tension rods. One end features standa...
Q3. Tightening a threaded nut over a washer places the underlying bolt under which combination of loads___________________?
Show answer Hide answer
Answer: B. tension
Tightening a nut draws the fastener threads together placing the bolt shank under high tensile stress. The washer distributes the clamping force evenly onto the connected structural joint surfaces. This applied axial ten...
Q4. Restoring worn or undersized machine elements that endure cyclic loads via electrodeposition is known as_____________________?
Show answer Hide answer
Answer: A. best method
Electrodeposition is widely considered the best method for restoring worn or undersized machine elements. Electroplating deposits a controlled layer of hard metal onto worn cylindrical journal surfaces. When properly con...
Q5. Which among the following options represents a correct assertion?
Show answer Hide answer
Answer: B. a member made of cast iron will generally be. more rigid than a member of equal load carrying ability made of steel
Steel has a higher modulus of elasticity than cast iron, meaning a steel member is more rigid than a cast iron member of equal load capacity.
Q6. A cantilever beam subjected to a concentrated load W deflects by an amount 8. If its cross-sectional width is reduced by half, the new deflection under W will be________________?
Show answer Hide answer
Answer: C. 48
Deflection in a rectangular cantilever beam is inversely proportional to its cross-sectional width; halving the width doubles the deflection.