State Qualifying Exam Preparation Guide

Electronics Technology

(ET)

Exams developed in partnership with Cengage Learning.

Book Information

Electronics for Electricians Author: Stephen L. Herman ISBN-13: 9781111127800 6th Edition ©2012 Published

Exam Topics

I. The Oscilloscope.

II. Semiconductors.

III. Power Rating and Heat Sinking Components.

IV. Junction Diodes.

V. Light-Emitting-Diodes (LEDs) and Photodiodes.

VI. Single-Phase Rectifiers.

VII. The Polyphase Rectifier.

VIII. Filters.

IX. Special Diodes.

X. The Transistor.

XI. The Transistor Switch.

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XII. The Transistor Amplifier.

XIII. The Darlington Amplifier.

XIV. Field Effect Transistors.

XV. Current Generators.

XVI. The Unijunction Transistor.

XVII. The SCR in a DC Circuit.

XVIII. The SCR in an AC Current.

XIX. Phase Shifting an SCR.

XX. UJT Phase Shifting for an SCR.

XXI. SCR Control of a Full-Wave Rectifier.

XXII. A Solid-State Alarm with Battery Backup.

XXIII. The Diac and Silicon Bilateral Switch.

XXIV. The Triac.

XXV. Phase Shifting the Triac.

XXVI. Other Methods of AC Voltage Control.

XXVII. The Solid-State Relay.

XXVIII. The Oscillator.

XXIX. The DC to DC Voltage Double.

XXX. The Off-Delay Timer.

XXXI. The On-Delay Timer.

XXXII. The Pulse Timer.

XXXIII. The 555 Timer.

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XXXIV. The 555 Timer Used as an Oscillator.

XXXV. The 555 On-Delay Timer.

XXXVI. The 555 Pulse Timer.

XXXVII. Above and Below-Ground Power Supplies.

XXXVIII. The Operational Amplifier.

XXXIX. The 741 Op Amp Level Detector.

XL. The 741 Operational Amplifier Used as an Oscillator.

XLI. Voltage Regulators.

XLII. Digital Logic.

XLIII. The Bounceless Switches. Circuit Applications.

XLIV. Design of Circuit #1 (Photodetector).

XLV. Design of Circuit #2 (Animal Feeder).

XLVI. Design of Circuit #3 (Solid-State Pushbutton Control).

XLVII. Design of Circuit #4 (Electronic Locks).

XLVIII. Design of Circuit #5 (Solid-State Thermostat). Sample Questions

1. Gold is the best natural conductor of electricity, followed by copper, silver, & aluminum. a. True b. False

2. Using thermal compound when heat sinking components is not a necessity.

a. True b. False

3. Power supplies designed to deliver a larger current generally do not use a choke input filter.

a. True b. False

4. An SCR must be phase shifted to gain complete control of the AC waveform supplied to it.

a. True b. False

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5. Solid-state relays can be used to control either a DC or an AC load. a. True b. False

6. A ____ clock is used in some electronic timers that must be very accurate.

a. quartz b. neon c. argon d. silicon

7. An inductor or ____ is used to filter the current.

a. choke b. sink c. capacitor d. transformer

8. The DC voltage doubler requires a(n) _____ to be connected before the load.

a. capacitor filter b. rectifier c. oscillator d. resistor

9. When using the oscilloscope, remember that the display is the product of ____.

a. voltage and current b. voltage and resistance c. voltage and time d. resistance and time

10. A millivolt difference between the two inputs is enough to drive the amplifier’s output

from one state to the other and it can be corrected with the addition of a ____. a. distress loop b. bridge loop c. hampered loop d. hysteresis loop