Electronic and Electrical Components

Question 1

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

Answer 1

B. Resistor

Question 2

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

Answer 2

C. Potentiometer

Question 3

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

Answer 3

B. Resistance

Question 4

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

Answer 4

B. Capacitor

Question 5

What type of electrical component consists of conductive surfaces separated by an insulator?
A. Resistor
B. Potentiometer
C. Oscillator
D. Capacitor

Answer 5

D. Capacitor

Question 6

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

Answer 6

C. Inductor

Question 7

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

Answer 7

D. Inductor

Question 8

What is the function of an SPDT switch?
A. A single circuit is opened or closed
B. Two circuits are opened or closed
C. A single circuit is switched between one of two other circuits
D. Two circuits are each switched between one of two other circuits

Answer 8

C. A single circuit is switched between one of two other circuits

A Single Pole Double Throw (SPDT) switch is a switch that only has a single input and can connect to and switch between 2 outputs. This means it has one input terminal and two output terminals.

Question 9

What electrical component is used to protect other circuit components from current overloads?
A. Fuse
B. Thyratron
C. Varactor
D. All these choices are correct

Answer 9

A. Fuse

Question 10

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

Answer 10

D. All these choices are correct

Question 11

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

Answer 11

B. Carbon-zinc

Question 12

What type of switch is represented by component 3 in figure T-2?
A. Single-pole single-throw
B. Single-pole double-throw
C. Double-pole single-throw
D. Double-pole double-throw

Answer 12

A. Single-pole single-throw

Question 13

Which is true about forward voltage drop in a diode?
A. It is lower in some diode types than in others
B. It is proportional to peak inverse voltage
C. It indicates that the diode is defective
D. It has no impact on the voltage delivered to the load

Answer 13

A. It is lower in some diode types than in others

Question 14

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

Answer 14

C. Diode

A diode is a two-terminal electronic component that conducts current primarily in one direction (asymmetric conductance). It has low (ideally zero) resistance in one direction and high (ideally infinite) resistance in the other.

Question 15

Which of these components can be used as an electronic switch?
A. Varistor
B. Potentiometer
C. Transistor
D. Thermistor

Answer 15

C. Transistor

A transistor is a semiconductor device used to amplify or switch electrical signals and power.

Question 16

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

Answer 16

B. Transistor

Question 17

What type of transistor has a gate, drain, and source?
A. Varistor
B. Field-effect
C. Tesla-effect
D. Bipolar junction

Answer 17

B. Field-effect

Question 18

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

Answer 18

B. With a stripe

Question 19

What causes a light-emitting diode (LED) to emit light?
A. Forward current
B. Reverse current
C. Capacitively-coupled RF signal
D. Inductively-coupled RF signal

Answer 19

A. Forward current

Question 20

What does the abbreviation FET stand for?
A. Frequency Emission Transmitter
B. Fast Electron Transistor
C. Free Electron Transmitter
D. Field Effect Transistor

Answer 20

D. Field Effect Transistor

The field-effect transistor (FET) is a type of transistor that uses an electric field to control the flow of current in a semiconductor. It comes in two types: junction FET (JFET) and metal-oxide-semiconductor FET (MOSFET). FETs have three terminals: source, gate, and drain. FETs control the flow of current by the application of a voltage to the gate, which in turn alters the conductivity between the drain and source.

Question 21

What are the names for the electrodes of a diode?
A. Plus and minus
B. Source and drain
C. Anode and cathode
D. Gate and base

Answer 21

C. Anode and cathode

Question 22

Which of the following can provide power gain?
A. Transformer
B. Transistor
C. Reactor
D. Resistor

Answer 22

B. Transistor

A transistor is a semiconductor device used to amplify or switch electrical signals and power.

Question 23

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

Answer 23

A. Gain

Question 24

What are the names of the electrodes of a bipolar junction transistor?
A. Signal, bias, power
B. Emitter, base, collector
C. Input, output, supply
D. Pole one, pole two, output

Answer 24

B. Emitter, base, collector

Question 25

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

Answer 25

C. Schematic

Question 26

What is component 1 in figure T-1? A. Resistor B. Transistor C. Battery D. Connector

Answer 26

A. Resistor A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.

Question 27

What is component 2 in figure T-1? A. Resistor B. Transistor C. Indicator lamp D. Connector

Answer 27

B. Transistor A transistor is a semiconductor device used to amplify or switch electrical signals and power. It is one of the basic building blocks of modern electronics.

Question 28

What is component 3 in figure T-1? A. Resistor B. Transistor C. Lamp D. Ground symbol

Answer 28

C. Lamp

Question 29

What is component 4 in figure T-1? A. Resistor B. Transistor C. Ground symbol D. Battery

Answer 29

D. Battery

Question 30

What is component 6 in figure T-2? A. Resistor B. Capacitor C. Regulator IC D. Transistor

Answer 30

B. Capacitor

Question 31

What is component 8 in figure T-2? A. Resistor B. Inductor C. Regulator IC D. Light emitting diode

Answer 31

D. Light emitting diode

Question 32

What is component 9 in figure T-2? A. Variable capacitor B. Variable inductor C. Variable resistor D. Variable transformer

Answer 32

C. Variable resistor

Question 33

What is component 4 in figure T-2? A. Variable inductor B. Double-pole switch C. Potentiometer D. Transformer

Answer 33

D. Transformer

Question 34

What is component 3 in figure T-3? A. Connector B. Meter C. Variable capacitor D. Variable inductor

Answer 34

D. Variable inductor

Question 35

What is component 4 in figure T-3? A. Antenna B. Transmitter C. Dummy load D. Ground

Answer 35

A. Antenna

Question 36

Which of the following is accurately represented in electrical schematics? A. Wire lengths B. Physical appearance of components C. Component connections D. All these choices are correct

Answer 36

C. Component connections

Question 37

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

Answer 37

B. Rectifier

Question 38

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

Answer 38

A. An electrically-controlled switch

Question 39

Which of the following is a 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

Answer 39

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

Question 40

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

Answer 40

C. Meter

Question 41

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

Answer 41

A. Regulator

Question 42

What component changes 120 V AC power to a lower AC voltage for other uses? A. Variable capacitor B. Transformer C. Transistor D. Diode

Answer 42

B. Transformer

Question 43

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

Answer 43

A. LED

Question 44

Which of the following is combined with an inductor to make a resonant circuit? A. Resistor B. Zener diode C. Potentiometer D. Capacitor

Answer 44

D. Capacitor

Question 45

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

Answer 45

C. Integrated circuit

Question 46

What is the function of component 2 in figure T-1? 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

Answer 46

C. Control the flow of current

Question 47

Which of the following is a resonant or tuned circuit? A. An inductor and a capacitor in series or parallel B. A linear voltage regulator C. A resistor circuit used for reducing standing wave ratio D. A circuit designed to provide high-fidelity audio

Answer 47

A. An inductor and a capacitor in series or parallel