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 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 thumb|Figure T2 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 thumb|Figure T1 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.