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General exam G6: Circuit Components

All 23 questions in subelement G6. The exam asks 2 of them, one from each group (G6A, G6B). Answers are hidden until you open them.

Drill these 23 questions Full practice exam

G6A

  1. G6A01 What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

    1. 6 volts
    2. 8.5 volts
    3. 10.5 volts
    4. 12 volts
    Show answer

    C. 10.5 volts

  2. G6A02 What is an advantage of batteries with low internal resistance?

    1. Long life
    2. High discharge current
    3. High voltage
    4. Rapid recharge
    Show answer

    B. High discharge current

  3. G6A03 What is the approximate forward threshold voltage of a germanium diode?

    1. 0.1 volt
    2. 0.3 volts
    3. 0.7 volts
    4. 1.0 volts
    Show answer

    B. 0.3 volts

  4. G6A04 Which of the following is characteristic of an electrolytic capacitor?

    1. Tight tolerance
    2. Much less leakage than any other type
    3. High capacitance for a given volume
    4. Inexpensive RF capacitor
    Show answer

    C. High capacitance for a given volume

  5. G6A05 What is the approximate forward threshold voltage of a silicon junction diode?

    1. 0.1 volt
    2. 0.3 volts
    3. 0.7 volts
    4. 1.0 volts
    Show answer

    C. 0.7 volts

  6. G6A06 Why should wire-wound resistors not be used in RF circuits?

    1. The resistor’s tolerance value would not be adequate
    2. The resistor’s inductance could make circuit performance unpredictable
    3. The resistor could overheat
    4. The resistor’s internal capacitance would detune the circuit
    Show answer

    B. The resistor’s inductance could make circuit performance unpredictable

  7. G6A07 What are the operating points for a bipolar transistor used as a switch?

    1. Saturation and cutoff
    2. The active region (between cutoff and saturation)
    3. Peak and valley current points
    4. Enhancement and depletion modes
    Show answer

    A. Saturation and cutoff

  8. G6A08 Which of the following is characteristic of low voltage ceramic capacitors?

    1. Tight tolerance
    2. High stability
    3. High capacitance for given volume
    4. Comparatively low cost
    Show answer

    D. Comparatively low cost

  9. G6A09 Which of the following describes MOSFET construction?

    1. The gate is formed by a back-biased junction
    2. The gate is separated from the channel by a thin insulating layer
    3. The source is separated from the drain by a thin insulating layer
    4. The source is formed by depositing metal on silicon
    Show answer

    B. The gate is separated from the channel by a thin insulating layer

  10. G6A10 Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

    1. Control grid
    2. Suppressor grid
    3. Screen grid
    4. Trigger electrode
    Show answer

    A. Control grid

  11. G6A11 What happens when an inductor is operated above its self-resonant frequency?

    1. Its reactance increases
    2. Harmonics are generated
    3. It becomes capacitive
    4. Catastrophic failure is likely
    Show answer

    C. It becomes capacitive

  12. G6A12 What is the primary purpose of a screen grid in a vacuum tube?

    1. To reduce grid-to-plate capacitance
    2. To increase efficiency
    3. To increase the control grid resistance
    4. To decrease plate resistance
    Show answer

    A. To reduce grid-to-plate capacitance

G6B

  1. G6B01 What determines the performance of a ferrite core at different frequencies?

    1. Its conductivity
    2. Its thickness
    3. The composition, or “mix,” of materials used
    4. The ratio of outer diameter to inner diameter
    Show answer

    C. The composition, or “mix,” of materials used

  2. G6B02 What is meant by the term MMIC?

    1. Multi-Mode Integrated Circuit
    2. Monolithic Microwave Integrated Circuit
    3. Metal Monolayer Integrated Circuit
    4. Mode Modulated Integrated Circuit
    Show answer

    B. Monolithic Microwave Integrated Circuit

  3. G6B03 Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

    1. Low power consumption
    2. High power handling capability
    3. Better suited for RF amplification
    4. Better suited for power supply regulation
    Show answer

    A. Low power consumption

  4. G6B04 What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

    1. 50 MHz
    2. 500 MHz
    3. 4 GHz
    4. 40 GHz
    Show answer

    C. 4 GHz

  5. G6B05 What is an advantage of using a ferrite core toroidal inductor?

    1. Large values of inductance may be obtained
    2. The magnetic properties of the core may be optimized for a specific range of frequencies
    3. Most of the magnetic field is contained in the core
    4. All these choices are correct
    Show answer

    D. All these choices are correct

  6. G6B06 What kind of device is an integrated circuit operational amplifier?

    1. Digital
    2. MMIC
    3. Programmable Logic
    4. Analog
    Show answer

    D. Analog

  7. G6B07 Which of the following describes a type N connector?

    1. A moisture-resistant RF connector useful to 10 GHz
    2. A small bayonet connector used for data circuits
    3. A low noise figure VHF connector
    4. A nickel plated version of the PL-259
    Show answer

    A. A moisture-resistant RF connector useful to 10 GHz

  8. G6B08 How is an LED biased when emitting light?

    1. In the tunnel-effect region
    2. At the Zener voltage
    3. Reverse biased
    4. Forward biased
    Show answer

    D. Forward biased

  9. G6B10 How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

    1. By creating an impedance in the current’s path
    2. It converts common-mode current to differential mode current
    3. By creating an out-of-phase current to cancel the common-mode current
    4. Ferrites expel magnetic fields
    Show answer

    A. By creating an impedance in the current’s path

  10. G6B11 What is an SMA connector?

    1. A type-S to type-M adaptor
    2. A small threaded connector suitable for signals up to several GHz
    3. A connector designed for serial multiple access signals
    4. A type of push-on connector intended for high-voltage applications
    Show answer

    B. A small threaded connector suitable for signals up to several GHz

  11. G6B12 Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

    1. PL-259
    2. BNC
    3. RCA Phono
    4. Type N
    Show answer

    C. RCA Phono

Questions: NCVEC Question Pool Committee (public domain). Pool valid July 1, 2023 – June 30, 2027.