Exam 18: Gas Tungsten Arc Welding of Pipe

Uneven buildup and burnthrough are sometimes referred to as ____________________.

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

____ help to reduce the number of repairs or rejections when welding under less than ideal conditions, such as in a limited space.

Excessive root reinforcement can cause reduced material flow, result in clogged pipes, or form ____________________ that will result in premature weld failure.

What is the most commonly used groove shape for pipe?

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

To purge the air out of a 10-foot section of 6-inch diameter pipe, if the flow rate is 20 cfh, the flow time will be approximately ____.

Which of the following is a cause of contamination of the back side of the molten weld pool?

____ result(s) from excessive heat, temperature, and filler metal during welding.

Most codes and standards for GTA pipe welding require no more than ____ inch of root reinforcement.

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

Which of the following is a measure of root reinforcement?

In preparing the pipe for welding, the pipe should be tack welded together with a root opening of ____ inch.

The amount of concavity in a root surface can be given as ____.

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

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

Incomplete fusion can be detected by ____.

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

What might affect the selection of the type of groove preparation on the end of a pipe?

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