Soal Ujian Teknik Pemesinan Gerinda

The given image shows a grinding wheel, which is commonly used for cutting or grinding materials. Therefore, it is suitable for "gerinda potong" or cutting grinding.

The correct answer is "kaca mata" because when operating a grinding machine, there is a risk of flying debris and sparks that can cause eye injuries. Wearing safety glasses or goggles (kaca mata) can protect the operator's eyes from these hazards. While gloves (sarung tangan), a helmet, and an apron are also important safety equipment, they do not specifically address the risk to the eyes in this context.

A portable grinding machine is a type of grinder that can be easily carried and used in different locations. The term "gerinda tangan" translates to "hand grinder" in English, indicating that it is a handheld device that can be operated manually. This type of grinder is convenient for tasks that require mobility and flexibility, allowing the user to grind materials in various positions and angles. On the other hand, "gerinda meja" refers to a table grinder, which is a stationary machine that is mounted on a table or workbench. Therefore, the correct answer is "gerinda tangan" as it is the only option that describes a portable grinding machine.

The correct answer is gerinda datar. This is because the question describes a machine tool that holds the workpiece using a movable magnetic table and cuts it using a rotating cutting tool on its axis. A gerinda datar, or surface grinding machine, fits this description as it is commonly used for precision grinding of flat surfaces.

The correct answer is "untuk lebih menghaluskan permukaan hasil gerinda". This is because the main function of using coolant in grinding processes is not to further smooth the surface of the workpiece, but rather to cool the grinding wheel, prevent the grinding debris from flying into the eyes, and bind and settle the grinding particles.