Practice Exam

E5D08

1. What is the primary cause of loss in film capacitors at RF?

• A. Inductance
• B. Self-discharge
• C. Skin effect
• D. Dielectric loss

E7G10

2. What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 1,800 ohms and RF is 68 kilohms?

• A. 38
• B. 1
• C. 0.03
• D. 76

E9E06

3. Which of these transmission line impedances would be suitable for constructing a quarter-wave Q-section for matching a 100-ohm feed point impedance to a 50-ohm transmission line?

• A. 90 ohms
• B. 75 ohms
• C. 62 ohms
• D. 50 ohms

E7D11

4. What is the purpose of an inverter connected to a solar panel output?

• A. Reduce AC ripple on the output
• B. Maintain voltage with varying illumination levels
• C. Prevent discharge when panel is not illuminated
• D. Convert the panel's output from DC to AC

E9A06

5. What is the effective radiated power (ERP) of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?

• A. 126 watts
• B. 2,000 watts
• C. 317 watts
• D. 300 watts

E4D03

6. What creates intermodulation interference between two repeaters in close proximity?

• A. The output frequencies are harmonically related
• B. The output signals cause feedback in the final amplifier of one or both transmitters
• C. The input frequencies are harmonically related
• D. The output signals mix in the final amplifier of one or both transmitters

E1E03

7. What is a Volunteer Examiner Coordinator?

• A. An organization that has entered into an agreement with the FCC to coordinate, prepare, and administer amateur operator license examinations
• B. An organization paid by the volunteer examiner team to publicize and schedule examinations
• C. A person who has volunteered to administer amateur operator license examinations
• D. The person who has entered into an agreement with the FCC to be the VE session manager

E6B08

8. Which of the following is a Schottky barrier diode?

• A. Metal-semiconductor junction
• B. Thermionic emission diode
• C. Electrolytic rectifier
• D. PIN junction

E9C01

9. What type of radiation pattern is created by two 1/4-wavelength vertical antennas spaced 1/2- wavelength apart and fed 180 degrees out of phase?

• A. A figure-eight broadside to the axis of the array
• B. Cardioid
• C. A figure-eight oriented along the axis of the array
• D. Omni-directional

E4A07

10. Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge?

• A. Antenna analyzers display a time-varying representation of the modulation envelope
• B. All these choices are correct
• C. Antenna analyzers compute SWR and impedance automatically
• D. Antenna analyzers automatically tune your antenna for resonance

E9D08

11. What happens as the Q of an antenna increases?

• A. SWR bandwidth decreases
• B. SWR bandwidth increases
• C. More common-mode current is present on the feed line
• D. Gain is reduced

E7C09

12. What is a crystal lattice filter?

• A. A filter for low-level signals made using quartz crystals
• B. A filter using lattice-shaped quartz crystals for high-Q performance
• C. A power supply filter made with interlaced quartz crystals
• D. An audio filter made with four quartz crystals that resonate at 1 kHz intervals

E2A04

13. What is meant by the "mode" of an amateur radio satellite?

• A. Whether the satellite is in a polar or equatorial orbit
• B. Whether the satellite is in a low earth or geostationary orbit
• C. The satellite's uplink and downlink frequency bands
• D. The satellite's orientation with respect to the Earth

E5B01

14. What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage or to discharge to 36.8% of its initial voltage?

• A. An exponential rate of one
• B. A time factor of one
• C. One exponential period
• D. One time constant

E5A11

15. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

• A. 315.6 Hz
• B. 23.67 kHz
• C. 157.8 Hz
• D. 47.3 kHz

E2B07

16. Which types of modulation are used for amateur television DVB-T signals?

• A. QAM and QPSK
• B. FM and FSK
• C. AM and OOK
• D. All these choices are correct

E7B10

17. In Figure E7-1, what is the purpose of R1 and R2?

• A. Voltage divider bias
• B. Load resistors
• C. Self bias
• D. Feedback

E6A12

18. What is the purpose of connecting Zener diodes between a MOSFET gate and its source or drain?

• A. To provide a voltage reference for the correct amount of reverse-bias gate voltage
• B. To protect the substrate from excessive voltages
• C. To protect the gate from static damage
• D. To keep the gate voltage within specifications and prevent the device from overheating

E1C09

19. What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?

• A. 3.0
• B. 1.0
• C. 2.0
• D. 0.5

E3C07

20. Which of the following indicates the greatest solar flare intensity?

• A. Class Z
• B. Class M
• C. Class X
• D. Class A

E9G05

21. Which of the following is a common use for a Smith chart?

• A. Determine the length and position of an impedance matching stub
• B. Determine the impedance of a transmission line, given the physical dimensions
• C. Determine the gain of an antenna given the physical and electrical parameters
• D. Determine the loss/100 feet of a transmission line, given the velocity factor and conductor materials

E7H05

22. How is positive feedback supplied in a Pierce oscillator?

• A. Through link coupling
• B. Through a quartz crystal
• C. Through a tapped coil
• D. Through a neutralizing capacitor

E5C09

23. When using rectangular coordinates to graph the impedance of a circuit, what do the axes represent?

• A. The X axis represents the magnitude, and the Y axis represents the phase angle
• B. The X axis represents the phase angle, and the Y axis represents the magnitude
• C. The X axis represents the resistive component, and the Y axis represents the reactive component
• D. The X axis represents the reactive component, and the Y axis represents the resistive component

E3B08

24. How does the maximum range of ground-wave propagation change when the signal frequency is increased?

• A. It decreases
• B. It peaks at roughly 8 MHz
• C. It increases
• D. It stays the same

E7A07

25. What logical operation does a NAND gate perform?

• A. It produces a 0 at its output if some but not all inputs are 1
• B. It produces a 0 at its output only if all inputs are 0
• C. It produces a 0 at its output only if all inputs are 1
• D. It produces a 1 at its output only if all inputs are 1

E7F02

26. What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal?

• A. An adaptive filter
• B. A phase-inverting filter
• C. A crystal-lattice filter
• D. A Hilbert-transform filter

E1F10

27. Who may be the control operator of an auxiliary station?

• A. Any licensed amateur operator
• B. Only General, Advanced, or Amateur Extra class operators
• C. Only Technician, General, Advanced, or Amateur Extra class operators
• D. Only Amateur Extra class operators

E9H09

28. What type of radiation pattern is created by a single-turn, terminated loop such as a pennant antenna?

• A. Cardioid
• B. Bidirectional
• C. Hyperbolic
• D. Omnidirectional

E7E02

29. What is the function of a reactance modulator?

• A. Produce PM or FM signals by varying a capacitance
• B. Produce AM signals by varying a resistance
• C. Produce PM or FM signals by varying a resistance
• D. Produce AM signals by varying an inductance

E4B08

30. Which of the following can be used to determine the Q of a series-tuned circuit?

• A. The resonant frequency of the circuit
• B. The bandwidth of the circuit's frequency response
• C. The frequency shift
• D. The ratio of inductive reactance to capacitive reactance

E8D07

31. What is a common cause of overmodulation of AFSK signals?

• A. Bit errors in the modem
• B. Excessive frequency deviation
• C. Excessive transmit audio levels
• D. Excessive numbers of retries

E6E03

32. Which of the following materials supports the highest frequency of operation when used in MMICs?

• A. Silicon nitride
• B. Silicon dioxide
• C. Gallium nitride
• D. Silicon

E3A08

33. When a meteor strikes the Earth's atmosphere, a linear ionized region is formed at what region of the ionosphere?

• A. The F2 region
• B. The F1 region
• C. The E region
• D. The D region

E6C02

34. What happens when the level of a comparator's input signal crosses the threshold voltage?

• A. The reference level appears at the output
• B. The comparator changes its output state
• C. The IC input can be damaged
• D. The feedback loop becomes unstable

E9B02

35. What is the front-to-back ratio of the antenna radiation pattern shown in Figure E9-1?

• A. 18 dB
• B. 24 dB
• C. 36 dB
• D. 14 dB

E4E01

36. What problem can occur when using an automatic notch filter (ANF) to remove interfering carriers while receiving CW signals?

• A. Any nearby signal passing through the DSP system will overwhelm the desired signal
• B. Excessive ringing
• C. Removal of the CW signal as well as the interfering carrier
• D. All these choices are correct

E4C10

37. What is an advantage of having a variety of receiver bandwidths from which to select?

• A. Receiver power consumption can be reduced when wider bandwidth is not required
• B. Receive bandwidth can be set to match the modulation bandwidth, maximizing signal-to-noise ratio and minimizing interference
• C. The noise figure of the RF amplifier can be adjusted to match the modulation type, thus increasing receiver sensitivity
• D. Multiple frequencies can be received simultaneously if desired

E6D11

38. Which type of core material decreases inductance when inserted into a coil?

• A. Brass
• B. Ferrite
• C. Ceramic
• D. Aluminum

E1D06

39. What is the maximum permitted transmitter output power when operating a model craft by telecommand?

• A. 100 watts
• B. 5 watts
• C. 1 watt
• D. 2 watts

E8C08

40. How does ARQ accomplish error correction?

• A. Special binary codes provide automatic correction
• B. If errors are detected, a retransmission is requested
• C. Special polynomial codes provide automatic correction
• D. If errors are detected, redundant data is substituted

E2C09

41. What type of equipment is commonly used to implement an amateur radio mesh network?

• A. A wireless router running custom firmware
• B. A 440 MHz transceiver with a 9,600-baud modem
• C. A computer running EchoLink to provide interface from the radio to the internet
• D. A 2-meter VHF transceiver with a 1,200-baud modem

E8B06

42. What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 7.5 kHz if the highest modulation frequency is 3.5 kHz?

• A. 0.214
• B. 0.47
• C. 2.14
• D. 47

E0A06

43. Why are there separate electric (E) and magnetic (H) MPE limits at frequencies below 300 MHz?

• A. E field and H field radiation intensity peaks can occur at different locations
• B. All these choices are correct
• C. The body reacts to electromagnetic radiation from both the E and H fields
• D. Ground reflections and scattering cause the field strength to vary with location

E2E01

44. Which of the following types of modulation is used for data emissions below 30 MHz?

• A. DTMF tones modulating an FM signal
• B. Spread spectrum
• C. Pulse modulation
• D. FSK

E2D01

45. Which of the following digital modes is designed for meteor scatter communications?

• A. Hellschreiber
• B. APRS
• C. WSPR
• D. MSK144

E9F01

46. What is the velocity factor of a transmission line?

• A. The velocity of a wave in the transmission line divided by the velocity of light in a vacuum
• B. The ratio of its characteristic impedance to its termination impedance
• C. The velocity of a wave in the transmission line multiplied by the velocity of light in a vacuum
• D. The ratio of its termination impedance to its characteristic impedance

E6F05

47. Which of the following describes an optical shaft encoder?

• A. An optical computing device in which light is coupled between devices by fiber optics
• B. A device for generating RTTY signals by means of a rotating light source
• C. A device that measures the strength of a beam of light using analog-to-digital conversion
• D. A device that detects rotation by interrupting a light source with a patterned wheel

E1A02

48. When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?

• A. 3 kHz above the lower band edge
• B. The exact lower band edge
• C. 1 kHz above the lower band edge
• D. 300 Hz above the lower band edge

E1B10

49. What frequencies are authorized to an amateur station operating under RACES rules?

• A. Specific segments in the amateur service MF, HF, VHF, and UHF bands
• B. Specific local government channels
• C. All amateur service frequencies authorized to the control operator
• D. All these choices are correct

E8A05

50. What is the benefit of making voltage measurements with a true-RMS calculating meter?

• A. RMS is measured for both sinusoidal and non-sinusoidal signals
• B. The signal's RMS noise factor is also calculated
• C. An inverse Fourier transform can be used
• D. The calculated RMS value can be converted directly into phasor form