Introduction 1
Tips on Taking Tests 1
Business Competency Examinations 4
Electrical Symbols 10
List of Symbols 12
Signaling System Outlets 16
Signaling System Outlets 21
Chapter 1 Review Definitions 51
Chapter 2 Ohm’s Law and Other Electrical Formulas 59
Series Circuits 60
Parallel Circuits 61
Units of Area and Resistance 64
Skin Effect 70
Voltage-Drop Calculations 71
Formulas for Determining Alternating
Current in Alternating-Current Circuits 73
Formulas for Combining Resistance
and Reactance 74
Relative Conductivity 88
Chapter 3 Power and Power Factor 91
Chapter 4 Lighting 105
Chapter 5 Branch Circuits and Feeders 113
Chapter 6 Transformer Principles and Connections 129
Chapter 7 Wiring Design and Protection 149
Chapter 8 Wiring Methods and Materials 167
Introduction
Tips on Taking Tests
It is the author’s experience that, for most electricians, knowing how to take a test is almost as important as knowing the technical information, as far as obtaining a passing grade is concerned. A great number of electricians fear tests more than they fear 480 volts.
Really, there is no good reason why this should be so. After all, if hundreds of thousands of men and women can pass these tests, anyone interested who gives a real effort and pays particular attention to some basic rules can succeed. Some basic rules for taking
tests are these:
1. Know the material being covered.
2. Know the format of the test.
3. Be physically and mentally prepared on the exam day.
4. RELAX!
5. Work the test the smartest way you can.
The first point—knowing the material being covered—is a mandatory prerequisite. Most test failures come from violating this rule. No, it isn’t always easy to learn all the material on a test.
It requires hours, sometimes many hours, of studying when you’d rather be doing other things. It means that you have to make your brain work harder than it wants to, going over the material again and again. Sorry, but unless you have an exceptional aptitude for learning, there are no shortcuts for hard, intense study. A good study guide (like this book) is about as much help as you can get.
The second rule for taking tests is that you need to know the format of the test. Some of the things you need to know are:
How many questions are on the test?
How many questions are open-book?
How many are closed-book?
Do all questions count for the same number of points?
Is there a penalty for wrong answers?
How much time is allowed for each section of the test?
Who wrote the test?
How will the test be graded?
You have to wait 03 seconds.
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Electrical Handbooks