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The Batteries and DC Circuits online electrical course course covers how electrochemical action is used. Covers batteries, electrolytic action, electroplating, characteristics of storage batteries, application and maintenance of lead-acid, nickel-alkaline, and nickel-cadmium batteries, putting batteries into service, charging batteries, maintaining records, fundamentals of DC circuits, and using Ohm's Law to solve problems in DC series, parallel, and series-parallel circuits. This course has no prerequisites. Batteries and DC Circuits is available in online maintenance training and course manual training formats.

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Battery characteristics; Electrolysis; Electroplating; Extracting and refining metals; Electrolytic corrosion; Choosing a battery

– Discuss electrochemical action.

– Explain how battery polarization works.

– State the definition of an electrolyte.

– List the factors to consider in selecting a battery.

Care and maintenance of dry cells; New kinds of primary cells; Secondary cells; Stationary batteries; Storage batteries

– State the characteristics of dry cells.

– Explain how to create a six-volt battery from 1.5 volt dry cells.

– Name the basic kinds of storage cells in use today.

– Explain how to calculate the rating required in a battery for a specific application.

Lesson 3 - Kinds of Batteries

Lead-acid batteries; Lead-calcium batteries; Nickel-iron alkaline cells; Nickel-cadmium alkaline cell

– Explain how plates in a cell are commonly assembled.

– List the advantages of nickel-cadmium battery.

– Discuss the construction of storage cells.

Lesson 4 - Maintaining Lead-Acid Batteries

Placing a new battery in service; Care of dry- and wet-charged batteries; Battery testing; Industrial truck batteries; Battery problems

– Name the three basic methods of charging batteries.

– Explain how to measure a cell's specific gravity.

– List causes of low specific gravity in a cell.

– Tell how to clean a wet, dirty battery cover.

Lesson 5 - Charging Lead-Acid Batteries

Battery charging; Initial and normal charge; Equalizing, trickle, emergency, boost, and freshening charge; Test discharge; Cell failure

– Discuss the different types of battery charges.

– List the common causes of cell failure.

– Explain how to mix electrolyte correctly.

– Explain how to treat both skin and eyes that have been splashed with acid.

Lesson 6 - Solving Problems in DC Circuits

Sources of DC electricity; Ohm's Law; Work; Torque; Power; Efficiency; Branch points and loops

– State the definition of a branch point.

– Solve a problem using the power formula.

– State the definition of Kirchhoff's rules.

– Define work, power, torque, and efficiency.

Lesson 7 - DC Series Circuits

Ohm's Law for series circuits; Current control; Voltage drop; Using equations; Using Kirchhoff's Rules

– Solve for E, I, and R in series circuits.

– State the basic rule you must follow when making changes in an equation.

Lesson 8 - Parallel Circuits

Recognizing parallel circuits; Resistance, voltage drop, and current in parallel circuits; Calculating resistance and power; Conductance

– Explain how to calculate the current in each branch of a parallel circuit.

– Explain how to calculate resistance in a parallel circuit.

– Calculate power in a parallel circuit.

– Find the reciprocal of any value.

Lesson 9 - Series-Parallel Circuits

DC motors and generators; Voltage dividers; Lighting circuits; Three- and four-way switch circuits

– Identify series, parallel, and series-parallel circuits.

– Explain how to calculate resistances in a series-parallel circuit.

– Demonstrate how to trace and simplify a circuit.

Lesson 10 - DC Circuits in Use

AC and DC electricity; AC waveform; Peak-to-peak, average, and effective values; Energy storage; Faraday's Law; Basic circuit concepts

– Demonstrate how to increase and decrease the speed of a dc motor by adding resistors.

– Identify a three-way switch.

– Calculate current and resistance using voltage divider circuits.