AWS Welding Inspection & Testing 2

Question 1

According to AWS D1.1, what is the minimum preheat temperature required for ASTM A36 steel with a thickness greater than 38 mm (1.5 in.) when using a low-hydrogen process?

Accepted Answer

107°C (225°F)

Answer

AWS D1.1 Table 4.2 requires a minimum preheat and interpass temperature of 107°C (225°F) for A36 steel greater than 38 mm thick when using a low-hydrogen process.

Question 2

Which destructive test is specifically used to evaluate the toughness (notch toughness) of weld metal and HAZ?

Accepted Answer

Charpy V-notch impact test

Answer

The Charpy V-notch (CVN) impact test measures the energy absorbed when a notched specimen is fractured by a swinging pendulum, providing a direct measure of material toughness at a specified temperature.

Question 3

During visual inspection of a completed weld, what measurement tool is used to verify weld size (leg size) of a fillet weld?

Accepted Answer

Fillet weld gauge (weld gauge)

Answer

A fillet weld gauge (such as an AWS fillet weld gauge or bridge cam gauge) is specifically designed to measure the actual leg size of fillet welds quickly and accurately during visual inspection.

Question 4

Which nondestructive testing (NDT) method is most effective for detecting subsurface discontinuities in austenitic stainless steel welds that cannot be detected by UT due to coarse grain structure?

Accepted Answer

Radiographic testing (RT)

Answer

Radiographic testing (RT) uses X-rays or gamma rays that penetrate the weld regardless of grain structure, making it effective for detecting internal voids, porosity, and inclusions in austenitic stainless steel where UT may be unreliable.

Question 5

What does the term 'interpass temperature' mean in welding inspection?

Accepted Answer

The maximum temperature of the weld deposit and surrounding base metal between passes in a multi-pass weld

Answer

Interpass temperature is the temperature of the weld joint area (weld deposit and adjacent base metal) at the time of welding just before each subsequent pass is started in a multi-pass weld.

AWS Practice Test

AWS Practice Test

AWS Welding Inspection & Testing 2