CRI Welding Processes & Techniques 2

Question 1

Which welding process uses a non-consumable tungsten electrode and an inert shielding gas to produce a weld?

Accepted Answer

GTAW

Answer

Gas Tungsten Arc Welding (GTAW), also known as TIG welding, uses a non-consumable tungsten electrode with inert shielding gas such as argon or helium.

Question 2

In Submerged Arc Welding (SAW), what covers the arc and molten weld pool to protect it from atmospheric contamination?

Accepted Answer

Granular flux

Answer

In SAW, a granular flux blanket completely submerges the arc and weld pool, providing both shielding and metallurgical benefits.

Question 3

What type of weld joint is formed when two members are positioned at an angle greater than 30° but less than 135° to each other?

Accepted Answer

Corner joint

Answer

A corner joint is formed when two members meet at a corner, typically at approximately 90°, forming an L-shape.

Question 4

Which welding discontinuity is most commonly associated with insufficient heat input during the Submerged Arc Welding process?

Accepted Answer

Incomplete fusion

Answer

Insufficient heat input in SAW leads to incomplete fusion because the base metal does not reach the required temperature to bond with the weld metal.

Question 5

What is the primary purpose of preheat in welding?

Accepted Answer

Reduce the risk of hydrogen-induced cracking

Answer

Preheat slows the cooling rate of the weld and heat-affected zone, reducing the risk of hydrogen-induced (cold) cracking, especially in hardenable steels.

(CRI) Certified Radiographic Interpreter Practice Test

(CRI) Certified Radiographic Interpreter Practice Test

CRI Welding Processes & Techniques 2