Lesson 1

Question 1

What is the primary purpose of pipe welding?

Answer 1

To join two or more pieces of pipe together to create a fluid-tight seal.

Question 2

True or False: Pipe welding can only be done using one specific welding method.

Answer 2

False

Question 3

Which welding process is commonly used for pipe welding?

Answer 3

TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding are commonly used.

Question 4

Fill in the blank: The __________ is a device used to hold the pipe in place during welding.

Answer 4

welding fixture

Question 5

What is a bevel in pipe welding?

Answer 5

A bevel is an angled edge on the pipe that allows for better penetration and fusion during welding.

Question 6

What does the term ‘root pass’ refer to in pipe welding?

Answer 6

The first pass of weld metal deposited in the joint.

Question 7

In pipe welding, what does the abbreviation ‘WPS’ stand for?

Answer 7

Welding Procedure Specification

Question 8

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

Answer 8

C) Corner joint

Question 9

What is the role of a filler material in pipe welding?

Answer 9

To provide additional material to fill the joint and create a strong bond.

Question 10

True or False: Preheating the pipe before welding can help prevent cracking.

Answer 10

True

Question 11

What is the purpose of post-weld heat treatment?

Answer 11

To relieve stresses and reduce the risk of cracking in the weld.

Question 12

Fill in the blank: The __________ is the area where the weld metal and base metal meet.

Answer 12

weld zone

Question 13

What is a common defect found in pipe welds?

Answer 13

Porosity, which are small holes caused by trapped gas.

Question 14

Multiple choice: Which welding technique is best suited for thin-walled pipes?
A) SMAW
B) TIG
C) FCAW
D) SAW

Answer 14

B) TIG

Question 15

What does the term ‘tack weld’ mean?

Answer 15

A temporary weld used to hold pieces in place before final welding.

Question 16

True or False: The diameter of the pipe does not affect the welding technique used.

Answer 16

False

Question 17

What is the significance of the ‘heat-affected zone’ (HAZ) in welding?

Answer 17

It is the area of the base metal that has had its microstructure and properties altered due to the heat of welding.

Question 18

Fill in the blank: The __________ is used to protect the molten weld from contamination.

Answer 18

shielding gas

Question 19

What is the main advantage of using MIG welding for pipe applications?

Answer 19

It allows for faster welding speeds and is easier to learn.

Question 20

Multiple choice: What type of electrode is used in TIG welding?
A) Consumable
B) Non-consumable
C) Solid
D) Flux-cored

Answer 20

B) Non-consumable

Question 21

What is the typical position for pipe welding known as ‘6G’?

Answer 21

A fixed position where the pipe is at an angle of 45 degrees.

Question 22

True or False: All welding processes produce the same amount of heat.

Answer 22

False

Question 23

What does ‘amperage’ refer to in welding?

Answer 23

The amount of electric current used during the welding process.

Question 24

Fill in the blank: A __________ is used to test the integrity of a weld after it has been completed.

Answer 24

weld inspection

Question 25

What is a common method for inspecting welds?

Answer 25

Ultrasonic testing or radiographic testing.

Question 26

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

Answer 26

D) All of the above

Question 27

What does the term 'duty cycle' refer to in welding?

Answer 27

The percentage of time a welder can operate in a given time period without overheating.

Question 28

True or False: The type of material being welded does not affect the welding parameters.

Answer 28

False

Question 29

What is the purpose of a welding rod?

Answer 29

To provide filler material and create the weld joint.

Question 30

Fill in the blank: The __________ method is often used for welding stainless steel pipes.

Answer 30

TIG welding

Question 31

What is meant by the term 'weld penetration'?

Answer 31

The depth to which the weld metal has fused into the base metal.

Question 32

Multiple choice: Which type of pipe requires more stringent welding procedures? A) PVC B) Carbon steel C) Stainless steel D) Copper

Answer 32

C) Stainless steel

Question 33

What is a 'weld map'?

Answer 33

A documentation of the welding process and parameters used for a specific project.

Question 34

True or False: The position of the welder does not affect the quality of the weld.

Answer 34

False

Question 35

What does the term 'slag' refer to in welding?

Answer 35

The impurities that float on top of a weld pool during the welding process.

Question 36

Fill in the blank: A __________ is often used to clean the weld area before starting.

Answer 36

wire brush

Question 37

What is the impact of moisture on welding rods?

Answer 37

Moisture can lead to hydrogen embrittlement and defects in the weld.

Question 38

Multiple choice: Which of the following is a common shielding gas used in TIG welding? A) Argon B) Oxygen C) Nitrogen D) Helium

Answer 38

A) Argon

Question 39

What is the significance of the 'weld joint configuration'?

Answer 39

It affects the strength and integrity of the weld.