Liquid Penetrant Testing Level 2 (PT-2) Practice Exam

Which type of casting involves the use of a metal mould?

1. Investment casting

2. Sand casting

3. Die casting

4. Lost wax process

The correct answer is: Die casting

The answer is based on the fact that die casting specifically utilizes a metal mold, also known as a die, to shape molten metal into the desired form. This process is characterized by forcing molten metal into the mold under high pressure, which allows for high precision and excellent surface finish in the final casting. In contrast, investment casting and lost wax processes involve creating a mold from a wax pattern that is later removed, leading to a more complex setup during the initial stages, but they do not primarily rely on metal molds for the entire casting process. Sand casting uses a sand-based mixture to create the mold, which is much less durable than metal molds used in die casting and typically offers lower precision. Therefore, when considering these different casting methods, die casting stands out for employing a robust metal mold directly in the production process.