CRI Welding Processes & Techniques 3

Question 1

What radiographic indication would most likely result from a weld made with excessive travel speed in GMAW?

Accepted Answer

Incomplete fusion

Answer

Excessive travel speed reduces heat input, leading to inadequate melting of the base metal and resulting in incomplete fusion between weld passes or at the fusion line.

Question 2

Which AWS welding symbol element indicates the size of a fillet weld?

Accepted Answer

Number to the left of the weld symbol

Answer

The fillet weld size is placed to the left of the fillet weld symbol on the welding symbol, indicating the leg size.

Question 3

Electroslag Welding (ESW) is primarily used for welding which of the following?

Accepted Answer

Thick plates in the vertical position

Answer

ESW is designed for welding thick plates (typically over 1 inch) in a single pass in the vertical position, making it efficient for heavy structural applications.

Question 4

What is the term for the unmelted base metal region adjacent to the fusion zone that has been altered by the heat of welding?

Accepted Answer

Heat-affected zone (HAZ)

Answer

The Heat-Affected Zone (HAZ) is the region of base metal not melted during welding but whose microstructure and properties have been altered by the welding heat.

Question 5

In resistance spot welding, what primarily causes the formation of a weld nugget?

Accepted Answer

Resistance heating at the faying surfaces

Answer

In resistance spot welding, electrical current passing through the resistance at the faying surfaces generates heat that melts the metal and forms the weld nugget.

(CRI) Certified Radiographic Interpreter Practice Test

(CRI) Certified Radiographic Interpreter Practice Test

CRI Welding Processes & Techniques 3