Question 1

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 B

Question 2

A concave root surface is sometimes known as ____________________.

Accepted Answer

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

Question 3

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 4

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 5

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.

Question 6

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

Question 7

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

Accepted Answer

backing gas

Question 8

____ 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

Question 9

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

Question 10

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

Question 11

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 12

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 13

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

Question 14

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

Question 15

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.

Question 16

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 17

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.

Question 18

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 19

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

Accepted Answer

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

Question 20

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...

Exam 18: Gas Tungsten Arc Welding of Pipe

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.

Correct Answer
verified
B

A concave root surface is sometimes known as ____________________.

Correct Answer
verified

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

Correct Answer
verified
The root face is the small flat surface ...
View Answer

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

Correct Answer
verified
First, estimate the interior volume of t...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
backing gas

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified
The stringer bead can be continued to ca...
View Answer

Exam 18: Gas Tungsten Arc Welding of Pipe

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.

Correct AnswerverifiedB

A concave root surface is sometimes known as ____________________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe root face is the small flat surface ...View AnswerShow Answer

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

Correct AnswerverifiedFirst, estimate the interior volume of t...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedbacking gas

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe stringer bead can be continued to ca...View AnswerShow Answer

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified
The root face is the small flat surface ...
View Answer

Correct Answer
verified
First, estimate the interior volume of t...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
backing gas

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The stringer bead can be continued to ca...
View Answer