Question 1

The easiest method of protecting the root from atmospheric contamination is to use a(n) ____________________.

Accepted Answer

backing gas

Question 2

Before the joint is assembled, to remove any sources of contamination, clean a ____ inch wide or wider band, both inside and outside of the pipe.

Accepted Answer

A)  ½ 
B)  1 
C)  1 ½ 
D)  2 
A)  ½ 
B)  1 
C)  1 ½ 
D)  2 B

Question 3

Define concave root surface and list its common causes and consequences.

Accepted Answer

A concave root surface (suck back) occurs when the back side of the root weld is concave in shape. Common causes for this condition are when insufficient filler metal is added to the joint, or excessive heat is used in the overhead position. The concavity of the root surface results in reduced thickness (actual throat) of the weld, which in turn causes a lower joint strength.

Question 4

Describe the specifications of the stringer bead used to cap the weld in a cover pass.

Accepted Answer

The stringer bead can be continued to ca

Question 5

The end of the pipe is prepared with a bevel, leaving a root face of ____ inch.

Accepted Answer

A)  1/16 to 1/8 
B)  1/16 to 1/4 
C)  3/32 to 1/8 
D)  1/8 to 1/4 
A)  1/16 to 1/8 
B)  1/16 to 1/4 
C)  3/32 to 1/8 
D)  1/8 to 1/4

Question 6

What welding technique can be used to reduce fatigue, improve torch control, and make longer, high-quality welds?

Accepted Answer

A)  Backhand welding 
B)  Forehand welding 
C)  Cup walking 
D)  No technique; GTA welding is always very tiring. 
A)  Backhand welding 
B)  Forehand welding 
C)  Cup walking 
D)  No technique; GTA welding is always very tiring.

Question 7

____ can result in premature cracking or failure of the weld at a load well under its expected strength.

Accepted Answer

A)  Porosity 
B)  Contamination 
C)  Stress points 
D)  Oxidization 
A)  Porosity 
B)  Contamination 
C)  Stress points 
D)  Oxidization

Question 8

For a similar feel to walking the cup on a V-groove, practice walking a roll of ____________________ w ith a 2 in. by 2 in. (50 x 50 mm) or larger angle iron.

Accepted Answer

The answer of For a similar feel to walking the...

Question 9

Which of the following is a common cause of a concave root surface?

Accepted Answer

A)  Insufficient filler metal 
B)  Insufficient heat 
C)  Poor shielding 
D)  Contamination of the weld surface 
A)  Insufficient filler metal 
B)  Insufficient heat 
C)  Poor shielding 
D)  Contamination of the weld surface

Question 10

The ____________________ of a weld is the deepest point into the joint where fusion between the base metal and the filler metal occurs.

Accepted Answer

The answer of The ____________________ of a weld is the...

Question 11

To contain backing gas in a pipe of small diameter, or short sections of pipe, ____.

Accepted Answer

A)  the ends of the pipe are capped 
B)  the pipe is plugged on either side of the weld 
C)  the pipe is plugged using water-soluble plugs 
D)  the pipe is plugged using soft plastic bags 
A)  the ends of the pipe are capped 
B)  the pipe is plugged on either side of the weld 
C)  the pipe is plugged using water-soluble plugs 
D)  the pipe is plugged using soft plastic bags

Question 12

Why are the ends of tack welds ground to a featheredge?

Accepted Answer

A)  It makes it easier to see as you weld across the tack welds. 
B)  It prevents the shielding gas from becoming turbulent and losing good gas coverage. 
C)  It stops porosity. 
D)  It makes it easier to have 100% penetration at the ending and beginning of the root weld. 
A)  It makes it easier to see as you weld across the tack welds. 
B)  It prevents the shielding gas from becoming turbulent and losing good gas coverage. 
C)  It stops porosity. 
D)  It makes it easier to have 100% penetration at the ending and beginning of the root weld.

Question 13

Explain why the root edge must be removed when preparing a pipe for welding.

Accepted Answer

The root face is the small flat surface

Question 14

After the bevel has been cut, the root face is created by ____.

Accepted Answer

A)  the bevel itself 
B)  grinding or machining the root edge 
C)  cutting a suitable gap in the pipe 
D)  cutting a U-groove 
A)  the bevel itself 
B)  grinding or machining the root edge 
C)  cutting a suitable gap in the pipe 
D)  cutting a U-groove

Question 15

The ____________________ of the root surface results in reduced thickness of the weld.

Accepted Answer

The answer of The ____________________ of the root surface results...

Question 16

Explain how to compute the flow time necessary for backing gas to purge a pipe of air.

Accepted Answer

First, estimate the interior volume of t

Question 17

A concave root surface is sometimes known as ____________________.

Accepted Answer

The answer of A concave root surface is sometimes known...

Question 18

Both the ____ and the ____ can be easily flame cut or ground, which makes them the most frequently used groove joints for training.

Accepted Answer

A)  single V-groove, single U-groove 
B)  single U-groove, single bevel-groove 
C)  single V-groove, single bevel-groove 
D)  single J-groove, single U-groove 
A)  single V-groove, single U-groove 
B)  single U-groove, single bevel-groove 
C)  single V-groove, single bevel-groove 
D)  single J-groove, single U-groove

Question 19

The ____________________ is the amount of metal deposited on the back side of a welded joint.

Accepted Answer

The answer of The ____________________ is the amount of metal...

Question 20

What is an advantage of bending the welding rod to the radius of the pipe?

Accepted Answer

A)  It makes the rod easier to hold and less likely to slip in the welder's gloved hand. 
B)  That way when the weld is stopped it is easier to see which end of the rod might be hot. 
C)  It allows the rod to be held at a closer angle to the pipe to minimize contamination. 
D)  It covers the joint to help to prevent incomplete fusion caused by the loss of the backing gas. 
A)  It makes the rod easier to hold and less likely to slip in the welder's gloved hand. 
B)  That way when the weld is stopped it is easier to see which end of the rod might be hot. 
C)  It allows the rod to be held at a closer angle to the pipe to minimize contamination. 
D)  It covers the joint to help to prevent incomplete fusion caused by the loss of the backing gas.

Exam 18: Gas Tungsten Arc Welding of Pipe

The easiest method of protecting the root from atmospheric contamination is to use a(n) ____________________.

Before the joint is assembled, to remove any sources of contamination, clean a ____ inch wide or wider band, both inside and outside of the pipe.

Define concave root surface and list its common causes and consequences.

Describe the specifications of the stringer bead used to cap the weld in a cover pass.

The end of the pipe is prepared with a bevel, leaving a root face of ____ inch.

What welding technique can be used to reduce fatigue, improve torch control, and make longer, high-quality welds?

____ can result in premature cracking or failure of the weld at a load well under its expected strength.

For a similar feel to walking the cup on a V-groove, practice walking a roll of ____________________ w ith a 2 in. by 2 in. (50 x 50 mm) or larger angle iron.

Which of the following is a common cause of a concave root surface?

The ____________________ of a weld is the deepest point into the joint where fusion between the base metal and the filler metal occurs.

To contain backing gas in a pipe of small diameter, or short sections of pipe, ____.

Why are the ends of tack welds ground to a featheredge?

Explain why the root edge must be removed when preparing a pipe for welding.

After the bevel has been cut, the root face is created by ____.

The ____________________ of the root surface results in reduced thickness of the weld.

Explain how to compute the flow time necessary for backing gas to purge a pipe of air.

A concave root surface is sometimes known as ____________________.

Both the ____ and the ____ can be easily flame cut or ground, which makes them the most frequently used groove joints for training.

The ____________________ is the amount of metal deposited on the back side of a welded joint.

What is an advantage of bending the welding rod to the radius of the pipe?

Introduction to Welding

Safety in Welding

Shielded Metal Arc Equipment, Setup, and Operation

Shielded Metal Arc Welding of Plate

Shielded Metal Arc Welding of Pipe

Shielded Metal Arc Welding Aws Sense Certification

Flame Cutting Equipment, Setup, and Operation

Plasma Arc Cutting Equipment, Setup, and Operation

Related Cutting Processes

Gas Metal Arc Welding Equipment, Setup, and Operation

Gas Metal Arc Welding

Flux Cored Arc Welding Equipment, Setup, and Operation

Flux Cored Arc Welding

Gas Metal Arc and Flux Cored Arc Welding of Pipe

Gas Metal Arc and Flux Cored Arc Welding Aws Sense Certification

Gas Tungsten Arc Welding Equipment, Setup, and Operation

Gas Tungsten Arc Welding of Plate

Gas Tungsten Arc Welding Plate and Pipe Aws Sense Certification

Shop Math and Weld Cost

Reading Technical Drawings

Welding Joint Design and Welding Symbols

Fabricating Techniques and Practices

Welding Codes and Standards

Testing and Inspection

Welding Metallurgy

Weldability of Metals

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding Equipment, Setup, and Operation

Oxyacetylene Welding and Brazing, Braze Welding, and Soldering

Filters

Both the and the can be easily flame cut or ground, which makes them the most frequently used groove joints for training.