The strap-type end on a steam engine connecting rod is fastened using_________________?
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Answer: A. gib of cotter joint
Explanation
Steam engine connecting rods often utilize strap-type ends to secure bearing brasses around crankpins. A gib and cotter joint assembly locks the strap securely onto the rod end while allowing precise adjustment. Tapered cotter keys driven alongside gibs wedge the components firmly together against operating loads. Cotter joints are mechanical fasteners that connect rods subject to axial tensile or compressive forces. Gibs are parallel-faced shims used alongside tapered cotters to prevent wear on the connected rod ends. Steam engines require adjustable bearing clearances to compensate for normal mechanical wear during operation.
Historical steam engines and large reciprocating pumps relied on strap-type connecting rod ends for maintenance access. Mechanical engineering education uses cotter joints to illustrate classic tapered wedge fastening principles. Industrial historians study strap-end connecting rod designs to understand nineteenth-century power plant machinery. Sleeve and cotter joints connect two coaxial rods rather than securing strap-type connecting rod ends. Spigot socket cotter joints join pipe sections or cylindrical rod ends rather than steam engine straps. Knuckle joints provide a flexible pinned hinge connection rather than a rigid gib and cotter rod assembly.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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