Practice Exam

E1B07

1. To what type of regulations does PRB-1 apply?

• A. State and local zoning
• B. FAA tower height limits
• C. Use of wireless devices in vehicles
• D. Homeowners associations

E9F08

2. Which of the following is a significant difference between foam dielectric coaxial cable and solid dielectric cable, assuming all other parameters are the same?

• A. Foam dielectric has lower safe operating voltage limits
• B. Foam dielectric has higher velocity factor
• C. All these choices are correct
• D. Foam dielectric has lower loss per unit of length

E1D03

3. What is a space telecommand station?

• A. An amateur station located on the surface of the Earth for communication with other Earth stations by means of Earth satellites
• B. An amateur station located in a satellite or a balloon more than 50 kilometers above the surface of the Earth
• C. An amateur station that receives telemetry from a satellite or balloon more than 50 kilometers above the surface of the Earth
• D. An amateur station that transmits communications to initiate, modify or terminate functions of a space station

E9D11

4. Which of the following conductors would be best for minimizing losses in a station's RF ground system?

• A. Stranded wire
• B. Solid wire
• C. Resistive wire, such as spark plug wire
• D. Wide flat copper strap

E4C02

5. Which of the following receiver circuits can be effective in eliminating interference from strong out-of-band signals?

• A. A narrow IF filter
• B. A front-end filter or pre-selector
• C. A notch filter
• D. A properly adjusted product detector

E1C09

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

• A. 0.5
• B. 3.0
• C. 2.0
• D. 1.0

E5B06

7. What is susceptance?

• A. The imaginary part of admittance
• B. A measure of the efficiency of a transformer
• C. The magnetic impedance of a circuit
• D. The ratio of magnetic field to electric field

E5A03

8. What is the magnitude of the impedance of a series RLC circuit at resonance?

• A. Approximately equal to circuit resistance
• B. High, as compared to the circuit resistance
• C. Approximately equal to inductive reactance
• D. Approximately equal to capacitive reactance

E2E07

9. Which of the following is a possible reason that attempts to initiate contact with a digital station on a clear frequency are unsuccessful?

• A. The protocol version you are using is not supported by the digital station
• B. All these choices are correct
• C. Another station you are unable to hear is using the frequency
• D. Your transmit frequency is incorrect

E7D01

10. How does a linear electronic voltage regulator work?

• A. It eliminates the need for a pass transistor
• B. The control element duty cycle is proportional to the line or load conditions
• C. The conduction of a control element is varied to maintain a constant output voltage
• D. It has a ramp voltage as its output

E7H03

11. How is positive feedback supplied in a Hartley oscillator?

• A. Through a tapped coil
• B. Through a neutralizing capacitor
• C. Through a capacitive divider
• D. Through link coupling

E4B03

12. Which S parameter is equivalent to forward gain?

• A. S22
• B. S12
• C. S11
• D. S21

E1E03

13. 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. The person who has entered into an agreement with the FCC to be the VE session manager
• D. A person who has volunteered to prepare amateur operator license examinations

E9E10

14. Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?

• A. Insert a 1/2 wavelength piece of 300-ohm twinlead in series between the antenna terminals and the 50-ohm feed cable
• B. Insert a 1/4-wavelength piece of 75-ohm coaxial cable transmission line in series between the antenna terminals and the 50-ohm feed cable
• C. Connect a 1/2 wavelength shorted stub of 75-ohm cable in parallel with the 50-ohm cable where it attaches to the antenna
• D. Connect a 1/4-wavelength open stub of 300-ohm twinlead in parallel with the coaxial feed line where it connects to the antenna

E8A03

15. What type of wave does a Fourier analysis show to be made up of sine waves of a given fundamental frequency plus all its harmonics?

• A. A sine wave
• B. A sawtooth wave
• C. A cosine wave
• D. A square wave

E9C05

16. Which of the following is a type of OCFD antenna?

• A. A folded dipole center-fed with 300-ohm transmission line
• B. A dipole fed approximately 1/3 the way from one end with a 4:1 balun to provide multiband operation
• C. A multiband dipole antenna using one-way circular polarization for frequency diversity
• D. A remotely tunable dipole antenna using orthogonally controlled frequency diversity

E9B02

17. In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?

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

E5C12

18. 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 8
• B. Point 7
• C. Point 1
• D. Point 3

E6D04

19. Which materials are commonly used as a core in an inductor?

• A. Teflon and Delrin
• B. Cobalt and aluminum
• C. Ferrite and brass
• D. Polystyrene and polyethylene

E5D01

20. What is the result of skin effect?

• A. Thermal effects on the surface of the conductor decrease the impedance
• B. Thermal effects on the surface of the conductor increase the impedance
• C. As frequency decreases, RF current flows in a thinner layer of the conductor, closer to the surface
• D. As frequency increases, RF current flows in a thinner layer of the conductor, closer to the surface

E8B01

21. What is the modulation index of an FM signal?

• A. The ratio of frequency deviation to modulating signal frequency
• B. The ratio of modulating signal amplitude to frequency deviation
• C. The type of modulation used by the transmitter
• D. The bandwidth of the transmitted signal divided by the modulating signal frequency

E6C08

22. In Figure E6-3, what is the schematic symbol for a NAND gate?

• A. 3
• B. 4
• C. 2
• D. 1

E4A01

23. Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?

• A. Amount of memory
• B. Sampling rate of the analog-to-digital converter
• C. Q of the circuit
• D. All these choices are correct

E9H04

24. What is an advantage of placing a grounded electrostatic shield around a small loop direction-finding antenna?

• A. It adds capacitive loading, increasing the bandwidth of the antenna
• B. It eliminates tracking errors caused by strong out-of-band signals
• C. It increases signal strength by providing a better match to the feed line
• D. It eliminates unbalanced capacitive coupling to the surroundings, improving the nulls

E2C08

25. Which of the following contacts may be confirmed through the U.S. QSL bureau system?

• A. Repeater contacts between U.S. club members
• B. Special event contacts between stations in the U.S.
• C. Contacts using tactical call signs
• D. Contacts between a U.S. station and a non-U.S. station

E1F02

26. What privileges are authorized in the U.S. to persons holding an amateur service license granted by the government of Canada?

• A. The operating terms and conditions of the Canadian amateur service license, not to exceed U.S. Amateur Extra Class license privileges
• B. None, they must obtain a U.S. license
• C. All privileges of the Amateur Extra Class license
• D. Full privileges, up to and including those of the Amateur Extra Class license, on the 80, 40, 20, 15, and 10 meter bands

E6E09

27. Which of the following component package types would be most suitable for use at frequencies above the HF range?

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

E6A01

28. In what application is gallium arsenide used as a semiconductor material?

• A. In high-power audio circuits
• B. In high-current rectifier circuits
• C. In microwave circuits
• D. In very low-frequency RF circuits

E7G09

29. What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?

• A. 2.3 volts
• B. -2.3 volts
• C. -0.23 volts
• D. 0.23 volts

E8D04

30. What is the primary effect of extremely short rise or fall time on a CW signal?

• A. Limits data speed
• B. More difficult to copy
• C. The generation of RF harmonics
• D. The generation of key clicks

E3A11

31. What is a typical range for tropospheric propagation of microwave signals?

• A. 100 miles to 300 miles
• B. 10 miles to 50 miles
• C. 1200 miles
• D. 2500 miles

E9G10

32. What do the arcs on a Smith chart represent?

• A. SWR
• B. Points with constant resistance
• C. Frequency
• D. Points with constant reactance

E3B09

33. At what time of year is sporadic E propagation most likely to occur?

• A. Around the equinoxes, especially the spring equinox
• B. Around the equinoxes, especially the fall equinox
• C. Around the solstices, especially the winter solstice
• D. Around the solstices, especially the summer solstice

E7A06

34. What is a characteristic of a monostable multivibrator?

• A. It produces a continuous square wave oscillating between 1 and 0
• B. It stores one bit of data in either a 0 or 1 state
• C. It switches momentarily to the opposite binary state and then returns to its original state after a set time
• D. It maintains a constant output voltage, regardless of variations in the input voltage

E3C11

35. What does VOACAP software model?

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

E6F03

36. What is the most common configuration of an optoisolator or optocoupler?

• A. An LED and a phototransistor
• B. A lens and a photomultiplier
• C. An amplitude modulated helium-neon laser
• D. A frequency modulated helium-neon laser

E2B01

37. How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

• A. 60
• B. 30
• C. 120
• D. 90

E1A03

38. What is the maximum legal carrier frequency on the 20 meter band for transmitting USB AFSK digital signals having a 1 kHz bandwidth?

• A. 14.149 MHz
• B. 14.349 MHz
• C. 14.100 MHz
• D. 14.070 MHz

E2D07

39. What digital protocol is used by APRS?

• A. 802.11
• B. AX.25
• C. AMTOR
• D. PACTOR

E7C07

40. Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50-ohm unbalanced output?

• A. A Phase Inverter Load network
• B. A Pi-network with an additional series inductor on the output
• C. A network with only three discrete parts
• D. A matching network in which all components are isolated from ground

E8C09

41. Which digital code allows only one bit to change between sequential code values?

• A. Excess 3 code
• B. Binary Coded Decimal Code
• C. Gray code
• D. Extended Binary Coded Decimal Interchange Code

E7E08

42. What are the principal frequencies that appear at the output of a mixer circuit?

• A. The square root of the product of input frequencies
• B. Two and four times the original frequency
• C. 1.414 and 0.707 times the input frequency
• D. The two input frequencies along with their sum and difference frequencies

E2A04

43. What is meant by the term "mode" as applied to an amateur radio satellite?

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

E9A03

44. What is the radiation resistance of an antenna?

• A. The specific impedance of the antenna
• B. The resistance in the atmosphere that an antenna must overcome to be able to radiate a signal
• C. The combined losses of the antenna elements and feed line
• D. The value of a resistance that would dissipate the same amount of power as that radiated from an antenna

E7B18

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

• A. Low input impedance
• B. Low bandwidth
• C. High power gain
• D. High filament voltage

E7F14

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

• A. More taps
• B. Complex phasor representations
• C. Higher data rate
• D. Double-precision math routines

E4D07

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

• A. Decrease the RF bandwidth of the receiver
• B. Raise the receiver IF frequency
• C. Switch from fast AGC to slow AGC
• D. Increase the receiver front end gain

E6B11

48. What is used to control the attenuation of RF signals by a PIN diode?

• A. Forward DC bias current
• B. Capacitance of an RF coupling capacitor
• C. Reverse voltage larger than the RF signal
• D. A sub-harmonic pump signal

E4E01

49. 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. Received CW signals will appear to be modulated at the DSP clock frequency
• C. Removal of the CW signal as well as the interfering carrier
• D. Ringing in the DSP filter will completely remove the spaces between the CW characters

E0A10

50. What toxic material may be present in some electronic components such as high voltage capacitors and transformers?

• A. Polymorphic silicon
• B. Polytetrafluoroethylene
• C. Polyethylene
• D. Polychlorinated biphenyls