Question 55 3AE01 - Third Assistant Engineer

The Correct Answer is D **Explanation for D (opening chamber):** The illustration MO-0112 typically refers to the mechanism of a die casting machine or similar machinery where two halves (dies or molds) move apart to release the solidified part. The letter "W" generally indicates the volume or chamber that is created as the moving die half retracts or "opens" away from the fixed die half. This space allows for the part to be extracted or removed, hence it is correctly termed the **opening chamber**. This terminology is standard in the context of molding and die casting machinery. **Explanation for Incorrect Options:** * **A) closing chamber:** This term is typically used to describe the chamber or space associated with the hydraulic or mechanical components responsible for pushing the die halves together (the closing force). It does not describe the volume created when the dies separate. * **B) parting chamber:** While the surface where the two halves meet is called the "parting line" or "parting surface," "parting chamber" is not a standard term for the area "W" which represents the space created *after* the parting occurs and the dies are separated (opened). * **C) upper sliding piston chamber:** This option describes a specific component related to the actuation mechanism (like a hydraulic cylinder or piston assembly) and not the operational volume created between the moving die halves, which is what "W" represents.