AWS Joint Design & Preparation Flashcards
7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 AWS Joint Design & Preparation flashcards as text
What is the purpose of a backing bar in a groove weld joint?
Answer: To support the molten weld pool and ensure complete joint penetration
A backing bar supports the molten weld pool during root pass welding, ensuring complete joint penetration without burn-through.
When a T-joint is designed with a fillet weld on both sides, what is the primary benefit compared to a single-sided fillet weld?
Answer: It reduces angular distortion and increases load-carrying capacity
Double-sided fillet welds balance thermal stresses, reducing angular distortion while doubling the effective throat area for higher load capacity.
According to AWS standards, what does the term 'effective throat' refer to in a fillet weld?
Answer: The theoretical distance from the root to the hypotenuse of the largest right triangle inscribed in the fillet cross-section
Effective throat is the theoretical distance from the root to the weld face hypotenuse, used to calculate the load-bearing capacity of fillet welds.
Which joint design is most susceptible to lamellar tearing?
Answer: T-joints and corner joints with through-thickness loading on thick plates
T-joints and corner joints subject thick base metal to through-thickness stress, which can cause lamellar tearing along sulfide inclusions in the steel.
What is the function of a weld access hole (also called a rat hole or cope hole) in structural steel connections?
Answer: To allow the welder access to make a continuous weld past a flange-web intersection
Weld access holes are cut into the web at beam-to-column connections to allow full-length continuous welds on flanges without interruption at the web.
In AWS D1.1, what is the minimum preheat temperature requirement for ASTM A36 steel with a thickness greater than 1-1/2 inches when using SMAW?
Answer: 150°F (65°C)
AWS D1.1 Table 3.2 requires a minimum preheat of 150°F for A36 steel over 1-1/2 inch thick to prevent hydrogen-induced cracking.
Which groove weld preparation is typically preferred for joining thick plates (over 3/4 inch) from one side only when back gouging is not possible?
Answer: Single-V groove with a backing strip
A single-V groove with a backing strip ensures complete joint penetration from one side when back gouging or access to the backside is not feasible.