Welding Stress and Distortion Quiz

What does stress refer to in materials?

• External force applied to a material

• Internal force acting within a material

• Temperature change in a material

• Weight of the material

What is residual stress?

• Stress that remains after external load is removed

• Stress caused by temperature changes

• Stress that occurs during welding

• Stress that is uniform throughout the material

Which type of residual stress occurs when metal expands but is restricted?

• Tensile stress

• Bending stress

• Compressive stress

• Shear stress

What is one method to control residual stress in welding?

• Using a jig or clamp

• Using thicker materials

• Increasing the cooling rate

• Welding from one side only

What does PWHT stand for?

• Permanent Weld Heat Treatment

• Pressure Weld Heat Treatment

• Pre Weld Heat Treatment

• Post Weld Heat Treatment

What is the purpose of post weld heat treatment?

• To reduce residual stress

• To increase the weight of the material

• To cool the material quickly

• To change the color of the material

What is one effect of uneven heating and cooling during welding?

• Decreased hardness

• Uniform expansion

• Increased ductility

• Residual stress

What type of distortion occurs when a material bends at a certain angle?

• Longitudinal distortion

• Radial distortion

• Angular distortion

• Transverse distortion

What is a common solution for correcting distortion after welding?

• Using lighter materials

• Adding more weld material

• Heating the material

• Cold straightening

Which factor does NOT influence residual stress in welding?

• Type of metal

• Thickness of metal

• Color of the metal

• Welding technique