Expert Global Solutions Mechanical Engg. Design Interview Questions, Process, and Tips

There are a total of 14 Geometric Dimensioning and Tolerancing (GD&T) symbols.

• There are 14 GD&T symbols used to define the geometry of mechanical parts.

• These symbols include Position, Concentricity, Symmetry, Circularity, etc.

• Each symbol has a specific meaning and is used to communicate design requirements accurately.

• GD&T symbols help in specifying the allowable variations in form, size, and orientation of

Different types of welding include MIG, TIG, stick, flux-cored, and spot welding.

• MIG welding uses a wire electrode and shielding gas to join metals together.

• TIG welding uses a tungsten electrode and inert gas to create a strong weld.

• Stick welding, also known as shielded metal arc welding, uses a flux-coated electrode.

• Flux-cored welding uses a tubular wire filled with flux to protect the weld.

• Spot welding is commonly us...read more

Welding symbols are graphical representations used in engineering drawings to communicate welding information.

• Welding symbols indicate the type of weld, dimensions, and other important information related to the welding process.

• They help in specifying the welding requirements without the need for lengthy written explanations.

• Common welding symbols include fillet weld, groove weld, plug weld, spot weld, etc.

• Examples of ...read more

Various manufacturing processes include casting, machining, welding, forming, and additive manufacturing.

• Casting: involves pouring molten metal into a mold to create a desired shape (e.g. sand casting, die casting)

• Machining: involves removing material from a workpiece using cutting tools (e.g. milling, turning)

• Welding: involves joining two or more pieces of metal together using heat and/or pressure (e.g. arc welding, s...read more

Surface treatment processes are used to improve the properties of a material's surface for various applications.

• Coating: Applying a thin layer of material to the surface for protection or aesthetic purposes (e.g. painting, anodizing).

• Plating: Depositing a layer of metal onto the surface for corrosion resistance or improved appearance (e.g. electroplating, galvanizing).

• Heat treatment: Altering the material's properties ...read more

Different types of metal joints include welded joints, bolted joints, riveted joints, soldered joints, and adhesive joints.

• Welded joints involve melting and fusing the metal pieces together.

• Bolted joints use bolts and nuts to secure the metal pieces together.

• Riveted joints use rivets to hold the metal pieces together.

• Soldered joints involve melting a filler metal to join the pieces together.

• Adhesive joints use adhesive

First-angle and third-angle projection methods are two different approaches used in engineering drawings to represent a 3D object in 2D.

• First-angle projection method is commonly used in Europe and Asia, where the object is imagined to be in the first quadrant and the views are projected onto the planes of projection from the object's side.

• Third-angle projection method is commonly used in North America, where the object...read more