Question

Gating system in casting controls:

• A. Cooling rate only
• B. Flow of molten metal
• C. Pouring time
• D. Mold expansion

Hint:

The primary role of the gating system is to control the flow of molten metal, ensuring uniform mold filling and minimizing casting defects.

Answer 1

The Correct Option is B

The gating system in casting plays a crucial role in controlling the flow of molten metal into the mold cavity. The primary purpose of the gating system is to ensure the metal flows evenly into all parts of the mold, preventing turbulence, air entrapment, and other casting defects. By controlling the flow of molten metal, the gating system helps achieve the desired quality of the cast part, such as proper filling of the mold and uniform solidification.
Explanation of other options:
- (1) Cooling rate is influenced by factors like mold material and the surrounding environment but is not directly controlled by the gating system. The gating system's function is more about directing the flow of molten metal
- (3) Pouring time refers to the duration of the pouring process, which is essential for controlling the flow rate but is not the primary function of the gating system itself.
- (4) Mold expansion refers to the physical behavior of the mold material, which may slightly expand as it heats up but is also not directly managed by the gating system.
Thus, the correct answer is (2), as the gating system controls the flow of molten metal into the mold.