Mock Welding interview in Mechanical Engineering | Questions and answers | Welding engineer job

Here are some interview questions and answers on welding in mechanical engineering:
Question 1: What is welding, and how is it used in mechanical engineering?
Answer: Welding is a fabrication process that joins two metal parts together by applying heat, pressure, or both. In mechanical engineering, welding is used to create structures, machines, and equipment by joining metal components.
Question 2: What are the different types of welding processes?
Answer: There are several types of welding processes, including:
- Shielded Metal Arc Welding (SMAW)
- Gas Metal Arc Welding (GMAW)
- Gas Tungsten Arc Welding (GTAW)
- Flux Cored Arc Welding (FCAW)
- Submerged Arc Welding (SAW)
Question 3: What is the difference between Arc Welding and MIG Welding?
Answer: Arc welding uses a consumable electrode covered in a flux, while MIG (GMAW) welding uses a continuous wire electrode and an inert gas to shield the arc.
Question 4: What is the purpose of welding symbols in engineering drawings?
Answer: Welding symbols provide information about the welding process, such as the type of weld, its location, and the required dimensions.
Question 5: How do you ensure the quality of a weld?
Answer: To ensure the quality of a weld, factors such as the welder's skill level, the cleanliness of the materials, and the proper selection of welding parameters (e.g., voltage, current, and travel speed) are crucial.
Question 6: What is the difference between a butt weld and a lap weld?
Answer: A butt weld joins two ends of metal together, while a lap weld joins two overlapping metal pieces.
Question 7: How does heat affect the properties of metals during welding?
Answer: Heat can alter the microstructure and properties of metals, potentially leading to changes in strength, ductility, and corrosion resistance.
Question 8: What safety precautions should be taken when welding?
Answer: Safety precautions include wearing personal protective equipment (PPE), ensuring proper ventilation, and following safety guidelines for equipment operation and fire prevention.
These questions cover basic concepts, types of welding processes, welding symbols, quality control, and safety considerations. Be prepared to provide specific examples and explanations related to your experience and knowledge of welding in mechanical engineering.