Question 9

The Correct Answer is C ### Why Option C ("wrist pin") is correct: The wrist pin (also commonly called a gudgeon pin) is the mechanical component specifically designed to pivotally connect the small end of the connecting rod to the piston. This connection allows the connecting rod to articulate (swing) relative to the piston as the piston moves up and down in the cylinder, converting the linear motion of the piston into the rotational motion needed by the crankshaft. ### Why the other options are incorrect: * **A) crank pin:** The crank pin (or connecting rod journal) is the journal on the crankshaft to which the *large end* of the connecting rod is attached. It handles the conversion of reciprocating motion into rotational motion. * **B) torque bushing:** A torque bushing is a generic term for a type of bearing or isolator used to dampen torsional vibrations, often found in driveline or suspension systems, but it is not the name of the component that connects the piston to the connecting rod. * **D) sliding wedge:** A sliding wedge is a simple machine element used primarily for fastening, adjusting, or lifting. It has no structural role in the pivot connection between the piston and the connecting rod.