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
The Question Pool
editQuestion 1
edit- 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
edit- 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
edit
- 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
edit- 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
edit- 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
edit- 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
edit- 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
edit- 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
edit- 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
edit
- 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
edit- 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
edit- 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.