3.2 - Components and Units
T5C12. What is impedance? A.A measure of the opposition to AC current flow in a circuit B.The inverse of resistance C.The Q or Quality Factor of a component D.The power handling capability of a component
A.A measure of the opposition to AC current flow in a circuit
T6D02. What is a relay? A.An electrically-controlled switch B.A current controlled amplifier C.An optical sensor D.A pass transistor
A.An electrically-controlled switch
T6D11. Which of the following is a 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
A.An inductor and a capacitor connected in series or parallel to form a filter
T6C11. What is component 4 in figure T3? https://arrlexamreview.appspot.com/img/T3.gif A.Antenna B.Transmitter C.Dummy load D.Ground
A.Antenna
T6C12. What do the symbols on an electrical schematic represent? A.Electrical components B.Logic states C.Digital codes D.Traffic nodes
A.Electrical components
T6B08. What does the abbreviation FET stand for? A.Field Effect Transistor B.Fast Electron Transistor C.Free Electron Transmitter D.Frequency Emission Transmitter
A.Field Effect Transistor
T6A09. What electrical component is used to protect other circuit components from current overloads? A.Fuse B.Capacitor C.Inductor D.All of these choices are correct
A.Fuse
T6B11. What is the term that describes a device's ability to amplify a signal? A.Gain B.Forward resistance C.Forward voltage drop D.On resistance
A.Gain
T6D07. Which of the following is commonly used as a visual indicator? A.LED B.FET C.Zener diode D.Bipolar transistor
A.LED
T6C02. What is component 1 in figure T1? https://arrlexamreview.appspot.com/img/T1.gif A.Resistor B.Transistor C.Battery D.Connector
A.Resistor
T6D03. What type of switch is represented by component 3 in figure T2? https://arrlexamreview.appspot.com/img/T2.gif A.Single-pole single-throw B.Single-pole double-throw C.Double-pole single-throw D.Double-pole double-throw
A.Single-pole single-throw
T5C02. What is the basic unit of capacitance? A.The farad B.The ohm C.The volt D.The henry
A.The farad
T6B05. Which of the following electronic components can amplify signals? A.Transistor B.Variable resistor C.Electrolytic capacitor D.Multi-cell battery
A.Transistor
T6A04. What electrical component stores energy in an electric field? A.Resistor B.Capacitor C.Inductor D.Diode
B.Capacitor
T6C06. What is component 6 in figure T2? https://arrlexamreview.appspot.com/img/T2.gif A.Resistor B.Capacitor C.Regulator IC D.Transistor
B.Capacitor
T6B07. What does the abbreviation LED stand for? A.Low Emission Diode B.Light Emitting Diode C.Liquid Emission Detector D.Long Echo Delay
B.Light Emitting Diode
T6D01. 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
B.Rectifier
T6A03. What electrical parameter is controlled by a potentiometer? A.Inductance B.Resistance C.Capacitance D.Field strength
B.Resistance
T6A01. What electrical component opposes the flow of current in a DC circuit? A.Inductor B.Resistor C.Voltmeter D.Transformer
B.Resistor
T6A08. What electrical component is used to connect or disconnect electrical circuits? A.Magnetron B.Switch C.Thermistor D.All of these choices are correct
B.Switch
T0A04. What is the purpose of a fuse in an electrical circuit? A.To prevent power supply ripple from damaging a circuit B.To interrupt power in case of overload C.To limit current to prevent shocks D.All of these choices are correct
B.To interrupt power in case of overload
T6D06. 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
B.Transformer
T6B04. Which of the following components can consist of three layers of semiconductor material? A.Alternator B.Transistor C.Triode D.Pentagrid converter
B.Transistor
T6B10. Which of the following could be the primary gain-producing component in an RF power amplifier? A.Transformer B.Transistor C.Reactor D.Resistor
B.Transistor
T6C03. What is component 2 in figure T1? https://arrlexamreview.appspot.com/img/T1.gif A.Resistor B.Transistor C.Indicator lamp D.Connector
B.Transistor
T6B06. How is the cathode lead of a semiconductor diode often marked on the package? A.With the word 'cathode' B.With a stripe C.With the letter C D.With the letter K
B.With a stripe
T6B09. What are the names of the two electrodes of a diode? A.Plus and minus B.Source and drain C.Anode and cathode D.Gate and base
C.Anode and cathode
T6C05. What is component 4 in figure T1? https://arrlexamreview.appspot.com/img/T1.gif A.Resistor B.Transistor C.Battery D.Ground symbol
C.Battery
T6D10. What is the function of component 2 in Figure T1? https://arrlexamreview.appspot.com/img/T1.gif 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
C.Control the flow of current
T6B02. What electronic component allows current to flow in only one direction? A.Resistor B.Fuse C.Diode D.Driven element
C.Diode
T0A05. Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse? A.The larger fuse would be likely to blow because it is rated for higher current B.The power supply ripple would greatly increase C.Excessive current could cause a fire D.All of these choices are correct
C.Excessive current could cause a fire
T6A06. What type of electrical component stores energy in a magnetic field? A.Resistor B.Capacitor C.Inductor D.Diode
C.Inductor
T6D09. 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
C.Integrated circuit
T6C04. What is component 3 in figure T1? https://arrlexamreview.appspot.com/img/T1.gif A.Resistor B.Transistor C.Lamp D.Ground symbol
C.Lamp
T6D04. Which of the following displays an electrical quantity as a numeric value? A.Potentiometer B.Transistor C.Meter D.Relay
C.Meter
T6A02. What type of component is often used as an adjustable volume control? A.Fixed resistor B.Power resistor C.Potentiometer D.Transformer
C.Potentiometer
T6C01. What is the name of an electrical wiring diagram that uses standard component symbols? A.Bill of materials B.Connector pinout C.Schematic D.Flow chart
C.Schematic
T5C04. What is the basic unit of inductance? A.The coulomb B.The farad C.The henry D.The ohm
C.The henry
T6C13. Which of the following is accurately represented in electrical schematics? A.Wire lengths B.Physical appearance of components C.The way components are interconnected D.All of these choices are correct
C.The way components are interconnected
T6B03. Which of these components can be used as an electronic switch or amplifier? A.Oscillator B.Potentiometer C.Transistor D.Voltmeter
C.Transistor
T6C08. What is component 9 in figure T2? https://arrlexamreview.appspot.com/img/T2.gif A.Variable capacitor B.Variable inductor C.Variable resistor D.Variable transformer
C.Variable resistor
T5C01. What is the ability to store energy in an electric field called? A.Inductance B.Resistance C.Tolerance D.Capacitance
D.Capacitance
T6A05. What type of electrical component consists of two or more conductive surfaces separated by an insulator? A.Resistor B.Potentiometer C.Oscillator D.Capacitor
D.Capacitor
T6D08. Which of the following is combined with an inductor to make a tuned circuit? A.Resistor B.Zener diode C.Potentiometer D.Capacitor
D.Capacitor
T5C03. What is the ability to store energy in a magnetic field called? A.Admittance B.Capacitance C.Resistance D.Inductance
D.Inductance
T6A07. What electrical component usually is constructed as a coil of wire? A.Switch B.Capacitor C.Diode D.Inductor
D.Inductor
T6C07. What is component 8 in figure T2? https://arrlexamreview.appspot.com/img/T2.gif A.Resistor B.Inductor C.Regulator IC D.Light emitting diode
D.Light emitting diode
T5C13. What is a unit of impedance? A.Volts B.Amperes C.Coulombs D.Ohms
D.Ohms
T6C09. What is component 4 in figure T2? https://arrlexamreview.appspot.com/img/T2.gif A.Variable inductor B.Double-pole switch C.Potentiometer D.Transformer
D.Transformer
T6B01. What class of electronic components uses a voltage or current signal to control current flow? A.Capacitors B.Inductors C.Resistors D.Transistors
D.Transistors
T6C10. What is component 3 in figure T3? https://arrlexamreview.appspot.com/img/T3.gif A.Connector B.Meter C.Variable capacitor D.Variable inductor
D.Variable inductor