Electrical Components

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

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

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

A. Electrical components

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

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

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

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

A. LED

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

A. Regulator

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

A. Transistor

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

B. Capacitor

Which of the following battery types is not rechargeable? A. Nickel-cadmium B. Carbon-zinc C. Lead-acid D. Lithium-ion

B. Carbon-zinc

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

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

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

B. Resistance

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

B. Resistor

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

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

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

B. Transistor

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

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

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

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

C. Diode

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

C. Inductor

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

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

C. Meter

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

C. Potentiometer

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

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

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

C. To prevent coupling of unwanted signals to or from the wire

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

C. Transistor

Which of the following battery types is rechargeable? A. Nickel-metal hydride B. Lithium-ion C. Lead-acid gel-cell D. All of these choices are correct

D. All of these choices are correct

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

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

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

D. Inductor

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