Learners examine the basic types of dimensioning including unidirectional and aligned systems, and linear, aligned, angled, arrowless, chain, datum, chart, tabular, radius, diameter, typical, and reference dimensions.

The learner will define indirect measurement, identify common indirect measuring tools, and select the proper measuring tool for the situation.

In this interactive and animated object, learners examine orthographic projection and the Glass Box Theory. Front, side, and top view development is demonstrated with pictorial views of each object to help develop 2D to 3D visualization skills.

Learners examine the formulas for calculating work in ft-lb units and power in ft-lb/min. units.

In this animated activity, learners observe how pressure values throughout a hydraulic system are developed based on pump pressure and the size of the load.

Learners review guidelines for the proper use of a dial caliper. Illustrations appear throughout the learning object.

Learners follow a methodical approach for the dc analysis of series-parallel circuits.

In this interactive object, learners review how to read a caliper. They then test their skills with eight practice questions.

The superposition theorem is explained as it relates to dc circuit analysis. Examples are given.

Learners study the fundamental operation of a triac, particularly how it is turned on and off. A brief quiz completes the activity.

In this learning activity you'll determine what happens to current flow in a series circuit when the resistance is changed.

Learners study an animation of a spring-and diaphragm actuator controlling the opening of a flow valve.

In this interactive object, students explore the basic elements and common terms associated with dimensions and leaders. A quiz completes the activity.

Learners examine the drawing symbols used for counterbore, countersink, spotface, radius, diameter, and depth. In the quiz that completes the activity, they associate these symbols with machining applications.

In this learning activity you'll review how a short affects current flow and voltage in a series circuit.

Learners use this interactive and animated object to examine the use of binary numbers in a programmable logic controller. A brief quiz completes the activity.

In this interactive object, learners read an introduction to Class 1, Class 2, and Class 3 levers and then take a quiz.

In this animated activity, learners examine the three main segments of a hydraulic system: power supply, control, and output. A brief quiz completes the learning object.

Learners study the types of information letters and numbers placed inside general piping and instrumentation diagram symbols.

In this animated activity, a drill-and-clamp machine is used to show an application of a pressure-reducing valve. Recommendations on how to properly make pressure adjustments are also provided.

Learners examine the operation of a DC Shunt motor and its characteristics. A quiz completes the activity.

This interactive object is designed to help learners memorize schematic symbols used in pneumatic diagrams. Learners quiz themselves using electronic flashcards.

In this animated activity, learners view the seven steps that are used to calculate voltage and current values throughout a common-emitter transistor amplifier.

In this learning activity you'll examine how a sine bar is used to measure angles.

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.