Students review the functions of the keys on the Starrett HB400 Optical Comparator controller.

After a brief review, the student solves five practical shop problems using right angle trigonometry.

In this learning activity you'll test your knowledge of angular measurement in this 10-question quiz.

In this video, you’ll learn how to set up a long piece of tubing using a steady rest, so that you can bore the ends for a bearing.

In this interactive object, the learner reads an explanation of how various shielding gases are used in GMAW and FCAW. An exercise completes the activity.

Students view a video that shows the correct methods for starting a GTAW weld pool and adding filler. It focuses on the two problems that many students have – adding filler too soon and angling the torch so that the filler melts prematurely on the filler rod. Note: This activity is 3.6 mb.

In this animated and interactive object, learners follow steps that begin with choosing the correct drive roll and include feeding the electrode wire from the spool to the welding gun.

In this interactive object, learners read an explanation of the electrodes used for welding with the GMAW and FCAW processes. In two matching exercises, students test their knowledge of classification and specification numbers.

Learners view wire feed power sources ranging from 110-volt, single phase units to 460-volt, three-phase units. A description and photos of each are provided.

You'll practice identifying and explaining safe practices for grinding

Review the concepts of safety for Welding