AWS Welding Inspection, Testing & Quality Control 5

Question 1

What does 'interpass temperature' refer to in a multi-pass weld?

Accepted Answer

The maximum temperature of the weld and adjacent base metal before depositing the next pass

Answer

The preheat temperature applied before welding begins

Answer

The temperature at which the electrode is stored

Answer

The temperature reached during post-weld heat treatment

Question 2

Which weld discontinuity is most commonly associated with improper shielding gas coverage during GMAW?

Accepted Answer

Porosity

Answer

Slag inclusions

Answer

Underfill

Answer

Undercut

Question 3

What is the significance of the 'essential variable' concept in welding procedure qualification?

Accepted Answer

A change to an essential variable requires requalification of the welding procedure

Answer

It defines which tools the welder must use

Answer

It specifies the inspection method required

Answer

It determines the electrode storage temperature

Question 4

Which destructive test method is used to evaluate the hardness distribution across a weld cross-section, including the HAZ?

Accepted Answer

Vickers or Rockwell hardness traverse

Answer

Charpy impact test

Answer

Tensile test

Answer

Bend test

Question 5

In radiographic testing, what is the purpose of a penetrameter (IQI – Image Quality Indicator)?

Accepted Answer

To verify that the radiograph has sufficient sensitivity to detect relevant discontinuities

Answer

To calibrate the X-ray voltage

Answer

To measure the thickness of the weld reinforcement

Answer

To determine correct film development time

Question 6

What does the term 'lamellar tearing' describe in weld quality assessment?

Accepted Answer

Subsurface cracking in the base metal caused by through-thickness stress on material with low short-transverse ductility

Answer

Surface cracking caused by arc strikes

Answer

A crack that runs along the weld centerline

Answer

Cracking in the HAZ due to hydrogen

Question 7

What is the primary criterion used to accept or reject a weld based on visual inspection per AWS D1.1?

Accepted Answer

Comparison of measured weld dimensions and surface conditions against code-specified acceptance criteria

Answer

The weld color and surface oxidation level

Answer

The welder's certification level

Answer

The type of filler metal used