SAW Metallurgy & Weld Quality Inspection

Question 1

What is the primary reason for performing weld inspections?

Accepted Answer

To ensure weld meets quality standards

Answer

To verify filler metal color

Answer

To identify the welder

Answer

To measure material thickness

Question 2

What metallurgical change can result from excessive heat input?

Accepted Answer

Grain coarsening

Answer

Grain refinement

Answer

Cold cracking

Answer

Martensitic transformation

Question 3

Which defect occurs when there is incomplete fusion between weld metal and base metal?

Accepted Answer

Lack of fusion

Answer

Crater crack

Answer

Porosity

Answer

Undercut

Question 4

Which non-destructive test is commonly used to detect internal weld defects?

Accepted Answer

Radiographic testing

Answer

Visual testing

Answer

Tape measure inspection

Answer

Hardness testing

Question 5

What role does the heat-affected zone (HAZ) play in weld quality?

Accepted Answer

It undergoes structural and property changes

Answer

It remains unaffected by welding

Answer

It acts as filler material

Answer

It increases weld dilution

Question 6

Which defect is characterized by trapped gas pockets in the weld metal?

Accepted Answer

Porosity

Answer

Undercut

Answer

Overlap

Answer

Crater crack

Question 7

Which element is often added to improve weld metal toughness?

Accepted Answer

Manganese

Answer

Sulfur

Answer

Phosphorus

Answer

Lead

Question 8

What is the main visual indication of undercut in a weld?

Accepted Answer

Groove along the weld edge

Answer

Raised bead

Answer

Weld overlap

Answer

Porous surface

Question 9

What is the function of post-weld heat treatment (PWHT)?

Accepted Answer

Improves residual stress and toughness

Answer

Increases weld cooling rate

Answer

Hardens the weld metal

Answer

Reduces filler metal usage