Question 14 AEL01 - Assistant Engineer - Limited

The Correct Answer is A **Explanation for Option A ("7"):** In the standard technical illustration (MO-0122) depicting a piston and connecting rod assembly, the component labeled **"7"** specifically indicates the **wrist pin** (also known as the piston pin). The wrist pin is the hardened steel shaft that connects the piston to the small end of the connecting rod, allowing the necessary articulation and transfer of force during the engine cycle. **Explanation of Why Other Options Are Incorrect:** * **Option B ("17"):** Component "17" typically refers to another part of the assembly, such as the connecting rod itself or possibly a part of the piston structure (like the skirt or a land), but it is not the wrist pin. * **Option C ("G"):** The letter designation "G" usually points to a specific feature, groove, or location on the piston, such as a piston ring groove or a cooling channel, rather than a major separate component like the wrist pin. * **Option D ("S"):** The letter designation "S" generally refers to a peripheral component or a surface feature. It may indicate a piston ring (like an oil control ring) or perhaps a retaining clip (circlip) used to secure the wrist pin, but it is not the wrist pin itself.