General Class License Exam Questions

Subelement G7

Practical Circuits

Question Display Options:
Group G7A Power supplies; and schematic symbols
G7A01 What useful feature does a power supply bleeder resistor provide?
G7A02 Which of the following components are used in a power supply filter network?
G7A03 What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?
G7A04 What is the peak-inverse-voltage across the rectifier in a half-wave power supply?
G7A05 What portion of the AC cycle is converted to DC by a half-wave rectifier?
G7A06 What portion of the AC cycle is converted to DC by a full-wave rectifier?
G7A07 What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?
G7A08(C) Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?
G7A09 Which symbol in figure G7-1 represents a field effect transistor?
G7A10 Which symbol in figure G7-1 represents a Zener diode?
G7A11 Which symbol in figure G7-1 represents an NPN junction transistor?
G7A12 Which symbol in Figure G7-1 represents a multiple-winding transformer?
G7A13 Which symbol in Figure G7-1 represents a tapped inductor?
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Group G7B Digital circuits; amplifiers and oscillators
G7B01 Complex digital circuitry can often be replaced by what type of integrated circuit?
G7B02 Which of the following is an advantage of using the binary system when processing digital signals?
G7B03 Which of the following describes the function of a two input AND gate?
G7B04 Which of the following describes the function of a two input NOR gate?
G7B05 How many states does a 3-bit binary counter have?
G7B06 What is a shift register?
G7B07 What are the basic components of virtually all sine wave oscillators?
G7B08 How is the efficiency of an RF power amplifier determined?
G7B09 What determines the frequency of an LC oscillator?
G7B10 Which of the following is a characteristic of a Class A amplifier?
G7B11 For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?
G7B12 Which of these classes of amplifiers has the highest efficiency?
G7B13 What is the reason for neutralizing the final amplifier stage of a transmitter?
G7B14 Which of the following describes a linear amplifier?
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Group G7C Receivers and transmitters; filters, oscillators
G7C01 Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?
G7C02 Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?
G7C03 What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?
G7C04 What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?
G7C05 Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?
G7C06 What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?
G7C07 What is the simplest combination of stages that implement a superheterodyne receiver?
G7C08 What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?
G7C09 Which of the following is needed for a Digital Signal Processor IF filter?
G7C10 How is Digital Signal Processor filtering accomplished?
G7C11 What is meant by the term "software defined radio" (SDR)?
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