# Batteries and DC Circuits

**Course Number: 722.1**

The Batteries and DC Circuits textbook 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.

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This textbook has been ** recently updated ** to include topics lists, objectives, & key terms for every chapter.

**Recommended Contact Hours – 15**

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## Table of Contents

### Chapter 1: Electrochemical Action

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

**Learning Objectives: **

- State the difference between a primary cell and a secondary cell.
- Discuss electrochemical action.
- Explain how battery polarization works.
- State the definition of an electrolyte.
- List the factors to consider in selecting a battery.

### Chapter 2: Battery Characteristics

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

**Learning Objectives: **

- List advantages of dry cells.
- 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.

### Chapter 3: Kinds of Batteries

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

**Learning Objectives: **

- List advantages of dry cells.
- 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.

### Chapter 4: Maintaining Lead-Acid Batteries

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

**Learning Objectives: **

- List the steps in placing a new dry-charged battery in service.
- 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.

### Chapter 5: Charging Lead-Acid Batteries

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

**Learning Objectives: **

- Explain how to conduct an initial charge.
- 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.

### Chapter 6: Solving Problems in DC Circuits

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

**Learning Objectives: **

- Define Ohm's Law and use it to solve a problem.
- 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.

### Chapter 7: DC Series Circuits

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

**Learning Objectives: **

- Describe a series circuit.
- Solve for E, I, and R in series circuits.
- State the basic rule you must follow when making changes in an equation.

### Chapter 8: Parallel Circuits

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

**Learning Objectives: **

- State the definition of a parallel circuit.
- 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.

### Chapter 9: Series-Parallel Circuits

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

**Learning Objectives: **

- State the definition of a series-parallel circuit.
- 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.

### Chapter 10: DC Circuits in Use

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

**Learning Objectives: **

- Explain how the three types of dc motors differ.
- 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.

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