D1.1 Practice Exam Questions And

AWS Certified Welder Structural Steel (D1.1) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• What is the primary purpose of preheating before welding carbon

steel?

• To clean the metal surface
• To reduce welding fumes
• To reduce the risk of cracking
• To improve weld appearance

Preheating slows the cooling rate of the weld and base metal, reducing the risk of hydrogen-induced cracking.

• What does the "D1.1" designation represent?
• A type of filler metal 1 / 4

• AWS Structural Welding Code – Steel
• A welding process
• A welder qualification test level

D1.1 is the AWS code governing welding of structural steel.

• Which electrode classification is commonly used for SMAW of

structural steel?

A. E6010

B. E6011

C. E7018

D. E7024

E7018 is a low-hydrogen electrode commonly used for structural steel to provide high-strength welds and good crack resistance.

• What is the recommended interpass temperature for welding carbon

steel?

A. 50–100°F

• Below 350°F

C. 400–500°F

• Above 600°F

Maintaining interpass temperature below 350°F helps prevent excessive hardness and cracking.

• What is the minimum preheat requirement for A36 steel thicker than
• inches when using low-hydrogen electrodes?

A. 50°F 2 / 4

B. 100°F

C. 150°F

D. 200°F

AWS D1.1 specifies minimum preheat for thicker sections to prevent cracking in high-carbon steels.

• Which welding position is most difficult according to AWS?
• Flat
• Horizontal
• Vertical
• Overhead

Overhead welding is most difficult due to gravity affecting the molten weld pool.

• What is the primary purpose of a welding procedure specification

(WPS)?

• To train new welders
• To inspect welds
• To provide specific welding parameters to ensure quality
• To list filler metals

A WPS documents welding parameters like current, voltage, and travel speed to ensure consistent weld quality.

• Which defect occurs due to rapid cooling of weld metal?
• Porosity
• Undercut 3 / 4

• Cracking
• Lack of fusion

Rapid cooling increases hardness and brittleness, which can lead to cracking.

• Which NDT method is most commonly required for structural steel

welds?

• Ultrasonic Testing
• Magnetic Particle Testing
• Radiographic Testing
• Visual Inspection

AWS D1.1 emphasizes visual inspection as the primary NDT method, supplemented by other methods if required.

• What is the function of a backing bar?
• To prevent porosity
• To support the electrode
• To support molten weld metal and ensure complete penetration
• To prevent spatter

Backing bars provide support for the weld pool and help achieve full penetration.

• What is the recommended technique for welding in the vertical-

up position?

• Drag technique
• Weave or zigzag with short arc
• / 4