Lesson 1 Flashcards
What is the primary purpose of pipe welding?
To join two or more pieces of pipe together to create a fluid-tight seal.
True or False: Pipe welding can only be done using one specific welding method.
False
Which welding process is commonly used for pipe welding?
TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding are commonly used.
Fill in the blank: The __________ is a device used to hold the pipe in place during welding.
welding fixture
What is a bevel in pipe welding?
A bevel is an angled edge on the pipe that allows for better penetration and fusion during welding.
What does the term ‘root pass’ refer to in pipe welding?
The first pass of weld metal deposited in the joint.
In pipe welding, what does the abbreviation ‘WPS’ stand for?
Welding Procedure Specification
Multiple choice: Which of the following is NOT a type of pipe joint?
A) Butt joint
B) Socket joint
C) Corner joint
D) T-joint
C) Corner joint
What is the role of a filler material in pipe welding?
To provide additional material to fill the joint and create a strong bond.
True or False: Preheating the pipe before welding can help prevent cracking.
True
What is the purpose of post-weld heat treatment?
To relieve stresses and reduce the risk of cracking in the weld.
Fill in the blank: The __________ is the area where the weld metal and base metal meet.
weld zone
What is a common defect found in pipe welds?
Porosity, which are small holes caused by trapped gas.
Multiple choice: Which welding technique is best suited for thin-walled pipes?
A) SMAW
B) TIG
C) FCAW
D) SAW
B) TIG
What does the term ‘tack weld’ mean?
A temporary weld used to hold pieces in place before final welding.
True or False: The diameter of the pipe does not affect the welding technique used.
False
What is the significance of the ‘heat-affected zone’ (HAZ) in welding?
It is the area of the base metal that has had its microstructure and properties altered due to the heat of welding.
Fill in the blank: The __________ is used to protect the molten weld from contamination.
shielding gas
What is the main advantage of using MIG welding for pipe applications?
It allows for faster welding speeds and is easier to learn.
Multiple choice: What type of electrode is used in TIG welding?
A) Consumable
B) Non-consumable
C) Solid
D) Flux-cored
B) Non-consumable
What is the typical position for pipe welding known as ‘6G’?
A fixed position where the pipe is at an angle of 45 degrees.
True or False: All welding processes produce the same amount of heat.
False
What does ‘amperage’ refer to in welding?
The amount of electric current used during the welding process.
Fill in the blank: A __________ is used to test the integrity of a weld after it has been completed.
weld inspection
What is a common method for inspecting welds?
Ultrasonic testing or radiographic testing.
Multiple choice: Which of the following is a safety precaution when pipe welding?
A) Wear gloves
B) Use a welding helmet
C) Ensure proper ventilation
D) All of the above
D) All of the above
What does the term ‘duty cycle’ refer to in welding?
The percentage of time a welder can operate in a given time period without overheating.
True or False: The type of material being welded does not affect the welding parameters.
False
What is the purpose of a welding rod?
To provide filler material and create the weld joint.
Fill in the blank: The __________ method is often used for welding stainless steel pipes.
TIG welding
What is meant by the term ‘weld penetration’?
The depth to which the weld metal has fused into the base metal.
Multiple choice: Which type of pipe requires more stringent welding procedures?
A) PVC
B) Carbon steel
C) Stainless steel
D) Copper
C) Stainless steel
What is a ‘weld map’?
A documentation of the welding process and parameters used for a specific project.
True or False: The position of the welder does not affect the quality of the weld.
False
What does the term ‘slag’ refer to in welding?
The impurities that float on top of a weld pool during the welding process.
Fill in the blank: A __________ is often used to clean the weld area before starting.
wire brush
What is the impact of moisture on welding rods?
Moisture can lead to hydrogen embrittlement and defects in the weld.
Multiple choice: Which of the following is a common shielding gas used in TIG welding?
A) Argon
B) Oxygen
C) Nitrogen
D) Helium
A) Argon
What is the significance of the ‘weld joint configuration’?
It affects the strength and integrity of the weld.
