In this learning activity you'll explore the operation of frequency division using several different types of counters.

The student takes a quiz concerning lathe cutting tools.

The learner will identify components of a welding robot and determine if the robot is set up correctly to avoid singularity.

Students view the formula for determining twist drill speeds in metal. Exercises complete the activity.

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.

Learners read a description of the wiring configuration of a residential Edison Wire System, which consists of a transformer secondary circuit. The circuit supplies two 115-volt sources and one 230-volt source.

Learners take a close look at the Edison Wire System and observe how the current values through the two lines and the neutral of the system change as the loads vary.

Learners view the waveforms and voltages of an Edison Three-Wire System and read a description of the polarities across the secondary of the center-tap transformer. This transformer supplies power to residential homes.

Routing protocols and troubleshooting

You'll practice identifying and explaining safe practices for grinding

Review the concepts of safety for Welding