Practice Exam

E6A05

1. How does DC input impedance at the gate of a field-effect transistor (FET) compare with that of a bipolar transistor?

• A. They are both high impedance
• B. An FET has higher input impedance
• C. An FET has lower input impedance
• D. They are both low impedance

E9D07

2. What is an advantage of top loading an electrically short HF vertical antenna?

• A. Lower Q
• B. Higher losses
• C. Greater structural strength
• D. Improved radiation efficiency

E2E02

3. Which of the following synchronizes WSJT-X digital mode transmit/receive timing?

• A. Synchronization of computer clocks
• B. Alignment of frequency shifts
• C. Sync-pulse timing
• D. Sync-field transmission

E6F06

4. Which of these materials is most commonly used to create photoconductive devices?

• A. Argon
• B. Polyphenol acetate
• C. Crystalline semiconductor
• D. All these choices are correct

E8C04

5. What technique minimizes the bandwidth of a PSK31 signal?

• A. Reed-Solomon character encoding
• B. Zero-sum character encoding
• C. Use of linear data pulses
• D. Use of sinusoidal data pulses

E5B02

6. What letter is commonly used to represent susceptance?

• A. X
• B. B
• C. Y
• D. G

E3C09

7. What type of data is reported by amateur radio propagation reporting networks?

• A. Digital-mode and CW signals
• B. Electric field intensity
• C. Solar flux
• D. Magnetic declination

E8B08

8. What describes orthogonal frequency-division multiplexing (OFDM)?

• A. A frequency modulation technique that uses non-harmonically related frequencies
• B. A digital modulation technique using subcarriers at frequencies chosen to avoid intersymbol interference
• C. A digital mode for narrow-band, slow-speed transmissions
• D. A bandwidth compression technique using Fourier transforms

E7H08

9. Which of the following components can be used to reduce thermal drift in crystal oscillators?

• A. Toroidal inductors
• B. Wirewound resistors
• C. Non-inductive resistors
• D. NP0 capacitors

E9F03

10. Why is the electrical length of a coaxial cable longer than its physical length?

• A. Electromagnetic waves move faster in coaxial cable than in air
• B. Skin effect is more pronounced in the coaxial cable
• C. Skin effect is less pronounced in the coaxial cable
• D. Electromagnetic waves move more slowly in a coaxial cable than in air

E6E09

11. Which of the following component package types have the least parasitic effects at frequencies above the HF range?

• A. Axial lead
• B. Radial lead
• C. Surface mount
• D. TO-220

E7B04

12. What is the operating point of a Class A common emitter amplifier?

• A. At a point where the load line intersects the zero bias current curve
• B. Approximately halfway between saturation and cutoff
• C. At a point where the bias resistor equals the load resistor
• D. Approximately halfway between the emitter voltage and the base voltage

E9B07

13. What is the difference in radiated power between a lossless antenna with gain and an isotropic radiator driven by the same power?

• A. They are the same
• B. The power radiated from the directional antenna is increased by the gain of the antenna
• C. The power radiated from the isotropic radiator is 2.15 dB greater than that from the directional antenna
• D. The power radiated from the directional antenna is stronger by its front-to-back ratio

E2C02

14. Which of the following file formats is used for exchanging amateur radio log data?

• A. NEC
• B. ARLD
• C. OCF
• D. ADIF

E5C08

15. What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive, and/or capacitive reactance?

• A. Polar coordinates
• B. Faraday grid
• C. Maidenhead grid
• D. Elliptical coordinates

E8A03

16. Which of the following describes a signal in the time domain?

• A. Frequency at different times
• B. Discrete impulses in time order
• C. Amplitude at different times
• D. Power at intervals of phase

E7E07

17. What is meant by the term "baseband" in radio communications?

• A. The lowest frequency band that the transmitter or receiver covers
• B. The basic oscillator frequency in an FM transmitter that is multiplied to increase the deviation and carrier frequency
• C. The unmodulated bandwidth of the transmitted signal
• D. The frequency range occupied by a message signal prior to modulation

E3B12

18. What is chordal-hop propagation?

• A. Propagation away from the great circle bearing between stations
• B. Propagation across the geomagnetic equator
• C. Signals reflected back toward the transmitting station
• D. Successive ionospheric refractions without an intermediate reflection from the ground

E9A04

19. Which of the following factors affect the feed point impedance of an antenna?

• A. Antenna height
• B. The input power level
• C. The settings of an antenna tuner at the transmitter
• D. Transmission line length

E1B08

20. What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receivers involved are of good engineering design?

• A. The amateur station must avoid transmitting during certain hours on frequencies that cause the interference
• B. The amateur station must cease operation on all frequencies below 30 MHz
• C. The amateur station must cease operation
• D. The amateur station must cease operation on all frequencies above 30 MHz

E6D03

21. Which of the following is an aspect of the piezoelectric effect?

• A. Mechanical deformation of material due to the application of a voltage
• B. Generation of electrical energy in the presence of light
• C. Increased conductivity in the presence of light
• D. Mechanical deformation of material due to the application of a magnetic field

E4A08

22. Which of the following is used to measure SWR?

• A. Antenna analyzer
• B. Vector network analyzer
• C. All these choices are correct
• D. Directional wattmeter

E8D09

23. What is considered an acceptable maximum IMD level for an idling PSK signal?

• A. +15 dB
• B. +5 dB
• C. +10 dB
• D. -30 dB

E1A02

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

E4D07

25. Which of the following reduces the likelihood of receiver desensitization?

• A. Insert attenuation before the first RF stage
• B. Switch from fast AGC to slow AGC
• C. Raise the receiver's IF frequency
• D. Increase the receiver's front-end gain

E2B12

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

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

E1F08

27. Which of the following types of amateur station communications are prohibited?

• A. Communications transmitted for hire or material compensation, except as otherwise provided in the rules
• B. Communications that have religious content
• C. Communications in a language other than English
• D. Communications that have political content, except as allowed by the Fairness Doctrine

E9H09

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

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

E4C12

29. How does a narrow-band roofing filter affect receiver performance?

• A. It improves blocking dynamic range by attenuating strong signals near the receive frequency
• B. It improves intelligibility by using low Q circuitry to reduce ringing
• C. It improves sensitivity by reducing front-end noise
• D. All these choices are correct

E6C05

30. Which of the following digital logic families has the lowest power consumption?

• A. ECL
• B. CMOS
• C. Schottky TTL
• D. NMOS

E5D11

31. How much real power is consumed in a circuit consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?

• A. 70.7 watts
• B. 141.4 watts
• C. 100 watts
• D. 200 watts

E3A07

32. Atmospheric ducts capable of propagating microwave signals often form over what geographic feature?

• A. Nimbus clouds
• B. Mountain ranges
• C. Large bodies of water
• D. Stratocumulus clouds

E1C07

33. What notifications must be given before transmitting on the 630- or 2200-meter bands?

• A. A special endorsement must be requested from the FCC
• B. An environmental impact statement must be filed with the Department of the Interior
• C. Operators must inform the Utilities Technology Council (UTC) of their call sign and coordinates of the station
• D. Operators must inform the FAA of their intent to operate, giving their call sign and distance to the nearest runway

E2D10

34. What does the packet path WIDE3-1 designate?

• A. Three subcarriers are permitted, subcarrier one is being used
• B. Three stations are allowed on frequency, one transmitting at a time
• C. Three digipeater hops are requested with one remaining
• D. Three internet gateway stations may receive one transmission

E2A12

35. What is the purpose of digital store-and-forward functions on an amateur radio satellite?

• A. To hold digital messages in the satellite for later download
• B. To upload operational software for the transponder
• C. To delay download of telemetry between satellites
• D. To relay messages between satellites

E0A03

36. Over what range of frequencies are the FCC human body RF exposure limits most restrictive?

• A. 30 - 300 MHz
• B. 3 - 30 MHz
• C. 300 - 3000 MHz
• D. 300 kHz - 3 MHz

E5A12

37. What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?

• A. 436.6 kHz
• B. 15.7 kHz
• C. 218.3 kHz
• D. 31.4 kHz

E7D08

38. What type of circuit is shown in Figure E7-2?

• A. Common base amplifier
• B. Switching voltage regulator
• C. Linear voltage regulator
• D. Common emitter amplifier

E1D01

39. What is the definition of telemetry?

• A. Two-way transmissions of data
• B. Two-way transmissions in excess of 1000 feet
• C. One-way transmission that initiates, modifies, or terminates the functions of a device at a distance
• D. One-way transmission of measurements at a distance from the measuring instrument

E4E02

40. Which of the following types of noise can often be reduced by a digital noise reduction?

• A. Ignition noise
• B. Broadband white noise
• C. Power line noise
• D. All these choices are correct

E7F14

41. Which of the following would allow a digital signal processing filter to create a sharper filter response?

• A. Double-precision math routines
• B. More taps
• C. Lower Q
• D. Higher data rate

E7A04

42. How many flip-flops are required to divide a signal frequency by 16?

• A. 6
• B. 16
• C. 8
• D. 4

E1E03

43. What is a Volunteer Examiner Coordinator?

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

E7C01

44. How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?

• A. An inductor is connected between the input and ground, another inductor is connected between the output and ground, and a capacitor is connected between the input and output
• B. Two inductors are in series between the input and output, and a capacitor is connected between the two inductors and ground
• C. Two capacitors are in series between the input and output, and an inductor is connected between the two capacitors and ground
• D. A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between the input and output

E4B04

45. Which S parameter represents input port return loss or reflection coefficient (equivalent to VSWR)?

• A. S21
• B. S11
• C. S12
• D. S22

E9G05

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

E9E05

47. What Yagi driven element feed point impedance is required to use a beta or hairpin matching system?

• A. Inductive (driven element electrically longer than 1/2 wavelength)
• B. Purely resistive
• C. Purely reactive
• D. Capacitive (driven element electrically shorter than 1/2 wavelength)

E7G11

48. What absolute voltage gain can be expected from the circuit in Figure E7-3 when R1 is 3,300 ohms and RF is 47 kilohms?

• A. 14
• B. 28
• C. 7
• D. 0.07

E6B05

49. What characteristic of a PIN diode makes it useful as an RF switch?

• A. Low junction capacitance
• B. Ability to dissipate large amounts of power
• C. Reverse bias controls its forward voltage drop
• D. Extremely high reverse breakdown voltage

E9C13

50. How does the radiation pattern of a horizontally polarized antenna vary with increasing height above ground?

• A. The horizontal beamwidth increases
• B. The takeoff angle of the lowest elevation lobe increases
• C. The horizontal beamwidth decreases
• D. The takeoff angle of the lowest elevation lobe decreases