Practice Exam

E5C12

1. Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?

• A. Point 1
• B. Point 7
• C. Point 8
• D. Point 3

E1B09

2. Which amateur stations may be operated under RACES rules?

• A. Only stations meeting the FCC Part 97 technical standards for operation during an emergency
• B. Any FCC-licensed amateur station except a Technician class
• C. Only those club stations licensed to Amateur Extra class operators
• D. Any FCC-licensed amateur station certified by the responsible civil defense organization for the area served

E6E06

3. What characteristics of MMICs make them a popular choice for VHF through microwave circuits?

• A. Nearly infinite gain, very high input impedance, and very low output impedance
• B. Extremely high Q factor and high stability over a wide temperature range
• C. The ability to retrieve information from a single signal, even in the presence of other strong signals
• D. Controlled gain, low noise figure, and constant input and output impedance over the specified frequency range

E3B08

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

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

E9H03

5. What is receiving directivity factor (RDF)?

• A. Forward gain compared to the gain in the reverse direction
• B. Relative directivity compared to a dipole
• C. Relative directivity compared to isotropic
• D. Peak antenna gain compared to average gain over the hemisphere around and above the antenna

E4C14

6. What is the purpose of the receiver IF Shift control?

• A. To tune in stations slightly off frequency without changing the transmit frequency
• B. To change frequency rapidly
• C. To reduce interference from stations transmitting on adjacent frequencies
• D. To permit listening on a different frequency from the transmitting frequency

E7F08

7. What is the function of decimation?

• A. Converting data to binary-coded decimal form
• B. Removing unnecessary significant digits
• C. Attenuating the signal
• D. Reducing the effective sample rate by removing samples

E2B12

8. What signals SSTV receiving software to begin a new picture line?

• A. A two-tone signal
• B. Specific tone amplitudes
• C. Specific tone frequencies
• D. Elapsed time

E1F09

9. Which of the following cannot be transmitted over an amateur radio mesh network?

• A. Third party traffic
• B. All these choices are correct
• C. Messages encoded to obscure their meaning
• D. Email

E2D07

10. What digital protocol is used by APRS?

• A. AX.25
• B. PACTOR
• C. AMTOR
• D. QAM

E9F01

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

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

E7D11

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

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

E6A11

13. In Figure E6-1, which is the schematic symbol for a P-channel junction FET?

• A. 6
• B. 3
• C. 1
• D. 2

E6C10

14. In Figure E6-3, which is the schematic symbol for a NOR gate?

• A. 2
• B. 1
• C. 4
• D. 3

E4D12

15. What is the link margin in a system with a transmit power level of 10 W (+40 dBm), a system antenna gain of 10 dBi, a cable loss of 3 dB, a path loss of 136 dB, a receiver minimum discernable signal of -103 dBm, and a required signal-to-noise ratio of 6 dB?

• A. +8dB
• B. -14dB
• C. +14dB
• D. -8dB

E1E10

16. What must the administering VEs do after the administration of a successful examination for an amateur operator license?

• A. They must collect and send the documents directly to the FCC
• B. They must submit the application document to the coordinating VEC according to the coordinating VEC instructions
• C. They must collect and submit the documents to the coordinating VEC for grading
• D. They must return the documents to the applicant for submission to the FCC according to the FCC instructions

E8B07

17. Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?

• A. EME
• B. Digital modes
• C. OFDM signals are not allowed on amateur bands
• D. Extremely low-power contacts

E8C12

18. What factors affect the bandwidth of a transmitted CW signal?

• A. Keying speed and shape factor (rise and fall time)
• B. IF bandwidth and Q
• C. All these choices are correct
• D. Modulation index and output power

E1C04

19. What is an IARP?

• A. The internal amateur radio practices policy of the FCC
• B. An indication of increased antenna reflected power
• C. A permit that allows US amateurs to operate in certain countries of the Americas
• D. A forecast of intermittent aurora radio propagation

E6B10

20. In Figure E6-2, which is the schematic symbol for a Schottky diode?

• A. 6
• B. 2
• C. 1
• D. 3

E6D02

21. What is the equivalent circuit of a quartz crystal?

• A. Parallel RLC, where C is the series combination of resonance capacitance of the crystal and electrode and stray capacitance
• B. Series RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance
• C. Series RLC in parallel with a shunt C representing electrode and stray capacitance
• D. Parallel RLC, where C is the parallel combination of resonance capacitance of the crystal and electrode and stray capacitance

E9E03

22. What matching system uses a short length of transmission line connected in parallel with the feed line at or near the feed point?

• A. Stub match
• B. Gamma match
• C. Delta match
• D. T-match

E7H03

23. What is a phase-locked loop?

• A. An electronic circuit also known as a monostable multivibrator
• B. An electronic servo loop consisting of a ratio detector, reactance modulator, and voltage-controlled oscillator
• C. An electronic circuit consisting of a precision push-pull amplifier with a differential phase input
• D. An electronic servo loop consisting of a phase detector, a low-pass filter, a voltage-controlled oscillator, and a stable reference oscillator

E1A03

24. What is the highest legal carrier frequency on the 20-meter band for transmitting a 2.8 kHz wide USB data signal?

• A. 14.1002 MHz
• B. 14.3490 MHz
• C. 14.1472 MHz
• D. 14.0708 MHz

E8D07

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

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

E2A04

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

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

E4A11

27. Which of the following can be measured with an antenna analyzer?

• A. Resonant frequency of a tuned circuit
• B. All these choices are correct
• C. Velocity factor
• D. Cable length

E6F04

28. What is the photovoltaic effect?

• A. The effect that causes a photodiode to emit light when a voltage is applied
• B. The conversion of light to electrical energy
• C. The conversion of voltage to current when exposed to light
• D. The effect that causes a phototransistor's beta to decrease when exposed to light

E7E05

29. What is added to an FM speech channel to boost the higher audio frequencies?

• A. A pre-emphasis network
• B. A heterodyne enhancer
• C. A harmonic enhancer
• D. A de-emphasis network

E1D11

30. Which amateur stations are eligible to operate as Earth stations?

• A. Only those of Amateur Extra class operators
• B. Only those of General, Advanced or Amateur Extra class operators
• C. Any amateur licensee who has successfully completed the AMSAT space communications course
• D. Any amateur station, subject to the privileges of the class of operator license held by the control operator

E2C07

31. What is the Cabrillo format?

• A. A method of exchanging information during a contest QSO
• B. A digital protocol specifically designed for rapid contest exchanges
• C. The most common set of contest rules
• D. A standard for submission of electronic contest logs

E7G08

32. How does the gain of an ideal operational amplifier vary with frequency?

• A. It decreases linearly with increasing frequency
• B. It does not vary with frequency
• C. It decreases logarithmically with increasing frequency
• D. It increases linearly with increasing frequency

E4B06

33. How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

• A. 112.5 watts
• B. 125 watts
• C. 75 watts
• D. 100 watts

E2E03

34. To what does the "4" in FT4 refer?

• A. Four-tone continuous-phase frequency shift keying
• B. All these choices are correct
• C. Four transmit/receive cycles per minute
• D. Multiples of 4 bits of user information

E4E06

35. What type of electrical interference can be caused by computer network equipment?

• A. A whining-type noise that continually pulses off and on
• B. A clicking noise at intervals of a few seconds
• C. A loud AC hum in the audio output of your station's receiver
• D. The appearance of unstable modulated or unmodulated signals at specific frequencies

E9G06

36. On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

• A. Polar axis
• B. Impedance axis
• C. Reactance axis
• D. Prime axis

E8A11

37. Which of the following is a measure of the quality of an analog-to-digital converter?

• A. Reciprocal mixing
• B. Peak envelope power
• C. Total harmonic distortion
• D. Power factor

E9B01

38. What is the 3 dB beamwidth of the antenna radiation pattern shown in Figure E9-1?

• A. 50 degrees
• B. 30 degrees
• C. 75 degrees
• D. 25 degrees

E9A07

39. What is the effective isotropic radiated power (EIRP) of a repeater station with 200 watts transmitter power output, 2 dB feed line loss, 2.8 dB duplexer loss, 1.2 dB circulator loss, and 7 dBi antenna gain?

• A. 159 watts
• B. 632 watts
• C. 252 watts
• D. 63.2 watts

E7C02

40. What is the frequency response of a T-network with series capacitors and a shunt inductor?

• A. Low-pass
• B. Band-pass
• C. Notch
• D. High-pass

E9D06

41. What happens to SWR bandwidth when one or more loading coils are used to resonate an electrically short antenna?

• A. It is increased
• B. It is unchanged if the loading coil is located at a voltage maximum point
• C. It is unchanged if the loading coil is located at the feed point
• D. It is decreased

E7A11

42. What does "positive logic" mean in reference to logic devices?

• A. The logic devices have high noise immunity
• B. High voltage represents a 1, low voltage a 0
• C. The logic circuit is in the "true" condition
• D. 1s and 0s are defined as different positive voltage levels

E5A10

43. What is the resonant frequency of an RLC circuit if R is 33 ohms, L is 50 microhenries, and C is 10 picofarads?

• A. 7.12 MHz
• B. 23.5 kHz
• C. 23.5 MHz
• D. 7.12 kHz

E7B06

44. What is a characteristic of a grounded-grid amplifier?

• A. High power gain
• B. Low bandwidth
• C. High electrostatic damage protection
• D. Low input impedance

E3A14

45. What are circularly polarized electromagnetic waves?

• A. Waves produced by a loop antenna
• B. Waves that circle Earth
• C. Waves with rotating electric and magnetic fields
• D. Waves with an electric field bent into a circular shape

E3C11

46. What does VOACAP software model?

• A. AC voltage and impedance
• B. HF propagation
• C. AC current and impedance
• D. VHF radio propagation

E5B09

47. What is the relationship between the AC current through a capacitor and the voltage across a capacitor?

• A. Current leads voltage by 90 degrees
• B. Voltage and current are 180 degrees out of phase
• C. Voltage leads current by 90 degrees
• D. Voltage and current are in phase

E9C05

48. What is the purpose of feeding an off-center-fed dipole (OCFD) between the center and one end instead of at the midpoint?

• A. To suppress off-center lobes at higher frequencies
• B. To resonate the antenna across a wider range of frequencies
• C. To create a similar feed point impedance on multiple bands
• D. To reduce common-mode current coupling on the feed line shield

E5D12

49. What is reactive power?

• A. Power consumed in circuit Q
• B. Power consumed by an inductor's wire resistance
• C. Wattless, nonproductive power
• D. The power consumed in inductors and capacitors

E0A01

50. What is the primary function of an external earth connection or ground rod?

• A. Prevent static build up on power lines
• B. Lightning charge dissipation
• C. Protect breaker panel from power surges
• D. Reduce RF current flow between pieces of equipment