FCC Technician Class Exam Study Guide - 2014-2018/Subelement T6 Group D

Component functions: rectification; switches; indicators; power supply components; resonant circuit; shielding; power transformers; integrated circuits

Question 1

 * Which of the following devices or circuits changes an alternating current into a varying direct current signal?
 * A. Transformer
 * B. Rectifier
 * C. Amplifier
 * D. Reflector

The correct answer is B.

Question 2

 * What best describes a relay?
 * A. A switch controlled by an electromagnet
 * B. A current controlled amplifier
 * C. An optical sensor
 * D. A pass transistor

The correct answer is A.

Question 3

 * What type of switch is represented by component 3 in figure T2?
 * A. Single-pole single-throw
 * B. Single-pole double-throw
 * C. Double-pole single-throw
 * D. Double-pole double-throw

The correct answer is A.

Question 4

 * Which of the following can be used to display signal strength on a numeric scale?
 * A. Potentiometer
 * B. Transistor
 * C. Meter
 * D. Relay

The correct answer is C.

Question 5

 * What type of circuit controls the amount of voltage from a power supply?
 * A. Regulator
 * B. Oscillator
 * C. Filter
 * D. Phase inverter

The correct answer is A.

Question 6

 * What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
 * A. Variable capacitor
 * B. Transformer
 * C. Transistor
 * D. Diode

The correct answer is B.

Question 7

 * Which of the following is commonly used as a visual indicator?
 * A. LED
 * B. FET
 * C. Zener diode
 * D. Bipolar transistor

The correct answer is A.

Question 8

 * Which of the following is used together with an inductor to make a tuned circuit?
 * A. Resistor
 * B. Zener diode
 * C. Potentiometer
 * D. Capacitor

The correct answer is D.

Question 9

 * What is the name of a device that combines several semiconductors and other components into one package?
 * A. Transducer
 * B. Multi-pole relay
 * C. Integrated circuit
 * D. Transformer

The correct answer is C.

Question 10

 * What is the function of component 2 in Figure T1?
 * A. Give off light when current flows through it
 * B. Supply electrical energy
 * C. Control the flow of current
 * D. Convert electrical energy into radio waves

The correct answer is C.

Question 11

 * What is a simple resonant or tuned circuit?
 * A. An inductor and a capacitor connected in series or parallel to form a filter
 * B. A type of voltage regulator
 * C. A resistor circuit used for reducing standing wave ratio
 * D. A circuit designed to provide high fidelity audio

The correct answer is A.

Question 12

 * Which of the following is a common reason to use shielded wire?
 * A. To decrease the resistance of DC power connections
 * B. To increase the current carrying capability of the wire
 * C. To prevent coupling of unwanted signals to or from the wire
 * D. To couple the wire to other signals

The correct answer is C.