3.2 - Components and Units

T5C02. What is the basic unit of capacitance? A. The farad B. The ohm C. The volt D. The henry

A

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

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

T6B05. Which of the following electronic components can amplify signals? A. Transistor B. Variable resistor C. Electrolytic capacitor D. Multi-cell battery

A

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

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

T6C02. What is component 1 in figure T1? Figure T1 -/\/\/\/- A. Resistor B. Transistor C. Battery D. Connector

A

T6C11. What is component 4 in figure T3? Figure T3 A. Antenna B. Transmitter C. Dummy load D. Ground

A

T6C12. What do the symbols on an electrical schematic represent? A. Electrical components B. Logic states C. Digital codes D. Traffic nodes

A

T6D02. What is a relay? A. An electrically-controlled switch B. A current controlled amplifier C. An optical sensor D. A pass transistor

A

T6D03. What type of switch is represented by component 3 in figure T2? Figure T2 A. Single-pole single-throw B. Single-pole double-throw C. Double-pole single-throw D. Double-pole double-throw

A

T6D07. Which of the following is commonly used as a visual indicator? A. LED B. FET C. Zener diode D. Bipolar transistor

A

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

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

T6A01. What electrical component opposes the flow of current in a DC circuit? A. Inductor B. Resistor C. Voltmeter D. Transformer

B

T6A03. What electrical parameter is controlled by a potentiometer? A. Inductance B. Resistance C. Capacitance D. Field strength

B

T6A04. What electrical component stores energy in an electric field? A. Resistor B. Capacitor C. Inductor D. Diode

B

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

T6B04. Which of the following components can consist of three layers of semiconductor material? A. Alternator B. Transistor C. Triode D. Pentagrid converter

B

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

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

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

T6C03. What is component 2 in figure T1? Figure T1 A. Resistor B. Transistor C. Indicator lamp D. Connector

B

T6C06. What is component 6 in figure T2? Figure T2 A. Resistor B. Capacitor C. Regulator IC D. Transistor

B

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

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

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

T5C04. What is the basic unit of inductance? A. The coulomb B. The farad C. The henry D. The ohm

C

T6A02. What type of component is often used as an adjustable volume control? A. Fixed resistor B. Power resistor C. Potentiometer D. Transformer

C

T6A06. What type of electrical component stores energy in a magnetic field? A. Resistor B. Capacitor C. Inductor D. Diode

C

T6B02. What electronic component allows current to flow in only one direction? A. Resistor B. Fuse C. Diode D. Driven element

C

T6B03. Which of these components can be used as an electronic switch or amplifier? A. Oscillator B. Potentiometer C. Transistor D. Voltmeter

C

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

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

T6C04. What is component 3 in figure T1? Figure T1 A. Resistor B. Transistor C. Lamp D. Ground symbol

C

T6C05. What is component 4 in figure T1? Figure T1 A. Resistor B. Transistor C. Battery D. Ground symbol

C

T6C08. What is component 9 in figure T2? Figure T2 A. Variable capacitor B. Variable inductor C. Variable resistor D. Variable transformer

C

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

T6D04. Which of the following displays an electrical quantity as a numeric value? A. Potentiometer B. Transistor C. Meter D. Relay

C

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

T6D10. What is the function of component 2 in Figure T1? 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

C

T5C01. What is the ability to store energy in an electric field called? A. Inductance B. Resistance C. Tolerance D. Capacitance

D

T5C03. What is the ability to store energy in a magnetic field called? A. Admittance B. Capacitance C. Resistance D. Inductance

D

T5C13. What is a unit of impedance? A. Volts B. Amperes C. Coulombs D. Ohms

D

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

T6A07. What electrical component usually is constructed as a coil of wire? A. Switch B. Capacitor C. Diode D. Inductor

D

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

T6C07. What is component 8 in figure T2? Figure T2 A. Resistor B. Inductor C. Regulator IC D. Light emitting diode

D

T6C09. What is component 4 in figure T2? Figure T2 A. Variable inductor B. Double-pole switch C. Potentiometer D. Transformer

D

T6C10. What is component 3 in figure T3? Figure T3 A. Connector B. Meter C. Variable capacitor D. Variable inductor

D

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