Exam 18: Gas Tungsten Arc Welding of Pipe

​What can be done to make it easier to set the root opening for tack welding?

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

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

Explain how to use a hot pass to correct incomplete fusion.

Concavity of the root surface is detected by ____.

____________________ are preplaced filler metal used for the root pass when consistent, high-quality welds are required.

The ____________________ is the next weld layer(s) to be made after the hot pass.

The end of the pipe is prepared with a ____ bevel.

The ____________________ is the distance between the original surface of the joint and the deepest point of fusion.

____ can lead to faster corrosion, oxide flaking, weld brittleness, leaks, stress points, or all of these.

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

Uneven buildup and burn-through are sometimes referred to as ____________________.

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

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

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

​What is the weld pass that can correct some of the problems with the root pass?

____ can be used to back any type of pipe if a welder is unsure about a less expensive substitution.

​What is the most commonly used groove shape for pipe?

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

Which of the following is a measure of root reinforcement?