Code Compliance & Standards Flashcards

Under AWS D1.1, which position is designated as '4G'?

Answer: Overhead groove weld

The 4G designation indicates an overhead position groove weld, where welding is performed from underneath the joint.

What is the minimum throat size for a fillet weld on a 3/4-inch base metal per AWS D1.1?

Answer: 3/16 inch

AWS D1.1 Table 5.8 specifies a minimum fillet weld size of 3/16 inch for base metal thickness over 1/2 inch through 3/4 inch.

Which nondestructive testing (NDT) method uses high-frequency sound waves to detect internal weld discontinuities?

Answer: Ultrasonic Testing (UT)

Ultrasonic Testing uses high-frequency sound waves that reflect off internal discontinuities to detect flaws inside a weld.

Per AWS D1.1, what is the maximum allowable porosity in a 1-inch length of weld for a statically loaded structure?

Answer: 3/8 inch aggregate diameter

AWS D1.1 limits aggregate porosity to 3/8 inch in any 1-inch length of weld for statically loaded structures.

What does the acronym 'PWHT' stand for in welding codes?

Answer: Post Weld Heat Treatment

PWHT stands for Post Weld Heat Treatment, a process used to reduce residual stresses and improve mechanical properties after welding.

Under AWS D1.1, who is responsible for ensuring all welding is performed per the approved WPS?

Answer: The contractor

AWS D1.1 places responsibility on the contractor to ensure all welding is performed in accordance with the approved WPS.

Which test method is best suited for detecting surface cracks in ferromagnetic welds?

Answer: Magnetic Particle Testing (MT)

Magnetic Particle Testing is specifically effective for detecting surface and near-surface discontinuities in ferromagnetic materials.