Technician exam T6: Electronic Components

All 46 questions in subelement T6. The exam asks 4 of them, one from each group (T6A, T6B, T6C, T6D). Answers are hidden until you open them.

T6A

1. T6A01 What electrical component opposes the flow of current in a DC circuit?

   1. Inductor
   2. Resistor
   3. Inverter
   4. Transformer
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   B. Resistor

2. T6A02 What type of component is often used as an adjustable volume control?

   1. Fixed resistor
   2. Power resistor
   3. Potentiometer
   4. Transformer
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   C. Potentiometer

3. T6A03 What electrical parameter is controlled by a potentiometer?

   1. Inductance
   2. Resistance
   3. Capacitance
   4. Field strength
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   B. Resistance

4. T6A04 What electrical component stores energy in an electric field?

   1. Resistor
   2. Capacitor
   3. Inductor
   4. Diode
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   B. Capacitor

5. T6A05 What type of electrical component consists of conductive surfaces separated by an insulator?

   1. Resistor
   2. Potentiometer
   3. Oscillator
   4. Capacitor
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   D. Capacitor

6. T6A06 What type of electrical component stores energy in a magnetic field?

   1. Resistor
   2. Capacitor
   3. Inductor
   4. Diode
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   C. Inductor

7. T6A07 What electrical component is typically constructed as a coil of wire?

   1. Transistor
   2. Capacitor
   3. Diode
   4. Inductor
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   D. Inductor

8. T6A08 What is the function of an SPDT switch?

   1. A single circuit is opened or closed
   2. Two circuits are opened or closed
   3. A single circuit is switched between one of two other circuits
   4. Two circuits are each switched between one of two other circuits
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   C. A single circuit is switched between one of two other circuits

9. T6A09 What type of switch is represented by component 3 in figure T-2?

   

   1. Single-pole single-throw
   2. Single-pole double-throw
   3. Double-pole single-throw
   4. Double-pole double-throw
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   A. Single-pole single-throw

10. T6A10 Which of the following battery chemistries is rechargeable?

    1. Nickel-metal hydride
    2. Lithium-ion
    3. Lead-acid
    4. All these choices are correct
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    D. All these choices are correct

11. T6A11 Which of the following battery chemistries is not rechargeable?

    1. Nickel-cadmium
    2. Carbon-zinc
    3. Lead-acid
    4. Lithium-ion
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    B. Carbon-zinc

T6B

1. T6B01 Which is true about forward voltage drop in a diode?

   1. It is lower in some diode types than in others
   2. It is proportional to peak inverse voltage
   3. It indicates that the diode is defective
   4. It has no impact on the voltage delivered to the load
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   A. It is lower in some diode types than in others

2. T6B02 What electronic component allows current to flow in only one direction?

   1. Resistor
   2. Fuse
   3. Diode
   4. Driven element
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   C. Diode

3. T6B03 Which of these components can be used as an electronic switch?

   1. Varistor
   2. Potentiometer
   3. Transistor
   4. Thermistor
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   C. Transistor

4. T6B04 Which of the following components can consist of three regions of semiconductor material?

   1. Alternator
   2. Transistor
   3. Triode
   4. Pentode
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   B. Transistor

5. T6B05 What type of transistor has a gate, drain, and source?

   1. Varistor
   2. Field-effect
   3. Hall-effect
   4. Bipolar junction
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   B. Field-effect

6. T6B06 How is the cathode lead of a semiconductor diode often marked on the package?

   1. With the word "cathode"
   2. With a stripe
   3. With the letter C
   4. With the letter K
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   B. With a stripe

7. T6B07 What causes a light-emitting diode (LED) to emit light?

   1. Forward current
   2. Reverse current
   3. Capacitively-coupled RF signal
   4. Inductively-coupled RF signal
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   A. Forward current

8. T6B08 What does the abbreviation FET stand for?

   1. Frequency Emission Transmitter
   2. Fast Electron Transistor
   3. Free Electron Transmitter
   4. Field Effect Transistor
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   D. Field Effect Transistor

9. T6B09 What are the names for the electrodes of a diode?

   1. Plus and minus
   2. Source and drain
   3. Anode and cathode
   4. Gate and base
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   C. Anode and cathode

10. T6B10 Which of the following can provide power gain?

    1. Transformer
    2. Transistor
    3. Reactor
    4. Resistor
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    B. Transistor

11. T6B11 What does the term gain mean in amplifiers?

    1. The output signal voltage relative to the input signal voltage
    2. The output signal current relative to the input signal current
    3. The output signal power relative to the input signal power
    4. All these choices are correct
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    D. All these choices are correct

12. T6B12 What are the names of the electrodes of a bipolar junction transistor?

    1. Signal, bias, power
    2. Emitter, base, collector
    3. Input, output, supply
    4. Pole one, pole two, output
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    B. Emitter, base, collector

T6C

1. T6C01 What is an electrical diagram using standard component symbols called?

   1. Connection chart
   2. Instrumentation system
   3. Schematic
   4. Flow chart
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   C. Schematic

2. T6C02 What is component 1 in figure T-1?

   

   1. Resistor
   2. Transistor
   3. Battery
   4. Connector
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   A. Resistor

3. T6C03 What is component 2 in figure T-1?

   

   1. Resistor
   2. Transistor
   3. Indicator lamp
   4. Connector
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   B. Transistor

4. T6C04 What is component 3 in figure T-1?

   

   1. Resistor
   2. Transistor
   3. Lamp
   4. Ground symbol
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   C. Lamp

5. T6C05 What is component 4 in figure T-1?

   

   1. Resistor
   2. Transistor
   3. Ground symbol
   4. Battery
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   D. Battery

6. T6C06 What is component 6 in figure T-2?

   

   1. Resistor
   2. Capacitor
   3. Regulator IC
   4. Transistor
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   B. Capacitor

7. T6C07 What is component 8 in figure T-2?

   

   1. Resistor
   2. Inductor
   3. Regulator IC
   4. Light emitting diode
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   D. Light emitting diode

8. T6C08 What is component 9 in figure T-2?

   

   1. Variable capacitor
   2. Variable inductor
   3. Variable resistor
   4. Variable transformer
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   C. Variable resistor

9. T6C09 What is component 4 in figure T-2?

   

   1. Variable inductor
   2. Double-pole switch
   3. Potentiometer
   4. Transformer
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   D. Transformer

10. T6C10 What is component 3 in figure T-3?

    

    1. Connector
    2. Meter
    3. Variable capacitor
    4. Variable inductor
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    D. Variable inductor

11. T6C11 What is component 4 in figure T-3?

    

    1. Antenna
    2. Transmitter
    3. Dummy load
    4. Ground
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    A. Antenna

12. T6C12 Which of the following is accurately represented in electrical schematics?

    1. Wire lengths
    2. Physical appearance of components
    3. Component connections
    4. All these choices are correct
    Show answer

    C. Component connections

T6D

1. T6D01 Which of the following devices or circuits changes an alternating current into a varying direct current signal?

   1. Transformer
   2. Rectifier
   3. Amplifier
   4. Reflector
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   B. Rectifier

2. T6D02 What is a relay?

   1. An electrically-controlled switch
   2. A current-controlled amplifier
   3. An inverting amplifier
   4. A pass transistor
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   A. An electrically-controlled switch

3. T6D03 Which of the following is a reason to use shielded wire?

   1. To decrease the resistance of DC power connections
   2. To increase the current carrying capability of the wire
   3. To prevent coupling of unwanted signals to or from the wire
   4. To reduce receiver overload
   Show answer

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

4. T6D04 Which of the following displays an electrical quantity as a numeric value?

   1. Potentiometer
   2. Transistor
   3. Meter
   4. Relay
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   C. Meter

5. T6D05 What type of circuit controls the amount of voltage from a power supply?

   1. Regulator
   2. Oscillator
   3. Filter
   4. Phase inverter
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   A. Regulator

6. T6D06 What component changes 120 V AC power to a lower AC voltage for other uses?

   1. Variable capacitor
   2. Transformer
   3. Transistor
   4. Diode
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   B. Transformer

7. T6D07 Which of the following is commonly used as a visual indicator?

   1. LED
   2. FET
   3. Zener diode
   4. All these choices are correct
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   A. LED

8. T6D08 Which of the following is combined with an inductor to make a resonant circuit?

   1. Resistor
   2. Zener diode
   3. Potentiometer
   4. Capacitor
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   D. Capacitor

9. T6D09 What is the name of a device that combines several semiconductors and other components into one package?

   1. Transducer
   2. Multi-pole relay
   3. Integrated circuit
   4. Transformer
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   C. Integrated circuit

10. T6D10 What is the function of component 2 in figure T-1?

    

    1. Give off light when current flows through it
    2. Supply electrical energy
    3. Control the flow of current
    4. Convert electrical energy into radio waves
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    C. Control the flow of current

11. T6D11 Which of the following is a resonant or tuned circuit?

    1. An inductor and a capacitor in series or parallel
    2. A linear voltage regulator
    3. A resistor circuit used for reducing standing wave ratio
    4. A circuit designed to provide high-fidelity audio
    Show answer

    A. An inductor and a capacitor in series or parallel

Questions: NCVEC Question Pool Committee (public domain). Pool valid July 1, 2026 – June 30, 2030.