Practice Exam

E7E05

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

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

E3A13

2. Which of these emission modes is best for auroral propagation?

• A. RTTY
• B. CW
• C. FM
• D. SSB

E6C07

3. What best describes a pull-up or pull-down resistor?

• A. A resistor connected to an op-amp output that prevents signals from exceeding the power supply voltage
• B. A resistor that ensures that an oscillator frequency does not drift
• C. A resistor connected to the positive or negative supply used to establish a voltage when an input or output is an open circuit
• D. A resistor in a keying circuit used to reduce key clicks

E4B09

4. Which of the following can be measured by a two-port vector network analyzer?

• A. Pulse rise time
• B. Forward power
• C. Phase noise
• D. Filter frequency response

E8D03

5. Which describes spread spectrum frequency hopping?

• A. A binary bit stream is used to shift the phase of an RF carrier very rapidly in a pseudorandom sequence
• B. If interference is detected by the receiver, it will signal the transmitter to change frequencies
• C. Rapidly varying the frequency of a transmitted signal according to a pseudorandom sequence
• D. RF signals are clipped to generate a wide band of harmonics which provides redundancy to correct errors

E2E12

6. How do ALE stations establish contact?

• A. ALE constantly scans a list of frequencies, activating the radio when the designated call sign is received
• B. ALE radios send a constant tone code to establish a frequency for future use
• C. ALE radios activate when they hear their signal echoed by back scatter
• D. ALE radios monitor an internet site for the frequency they are being paged on

E7H06

7. Which of these functions can be performed by a phase-locked loop?

• A. Photovoltaic conversion and optical coupling
• B. Wide-band AF and RF power amplification
• C. Frequency synthesis and FM demodulation
• D. Comparison of two digital input signals and digital pulse counting

E1F03

8. Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?

• A. The equipment dealer assembled it from a kit
• B. It was manufactured and certificated in a country which has a reciprocal certification agreement with the FCC
• C. The amplifier is constructed or modified by an amateur radio operator for use at an amateur station
• D. Gain is less than 23 dB when driven by power of 10 watts or less

E7A03

9. Which of the following can divide the frequency of a pulse train by 2?

• A. An OR gate
• B. A multiplexer
• C. An XOR gate
• D. A flip-flop

E5C07

10. Where is the impedance of a pure resistance plotted on rectangular coordinates?

• A. On a horizontal line, offset vertically above the horizontal axis
• B. On the horizontal axis
• C. On a line through the origin, slanted at 45 degrees
• D. On the vertical axis

E9G01

11. Which of the following can be calculated using a Smith chart?

• A. Radiation resistance
• B. Impedance along transmission lines
• C. Antenna radiation pattern
• D. Radio propagation

E1C12

12. In what portion of the 630-meter band are phone emissions permitted?

• A. None
• B. Only the bottom 3 kHz
• C. The entire band
• D. Only the top 3 kHz

E1D08

13. Which VHF amateur bands have frequencies authorized for space stations?

• A. 2 meters
• B. 6 meters, 2 meters, and 1.25 meters
• C. 6 meters and 2 meters
• D. 2 meters and 1.25 meters

E1E11

14. What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?

• A. Photocopy all examination documents and forward them to the FCC for processing
• B. Issue the examinee the new or upgrade license
• C. All these choices are correct
• D. Three VEs must certify that the examinee is qualified for the license grant and that they have complied with the administering VE requirements

E2D06

15. Which of the following is a method for establishing EME contacts?

• A. Judging optimum transmission times by monitoring beacons reflected from the moon
• B. Time-synchronous transmissions alternating between stations
• C. Storing and forwarding digital messages
• D. High-speed CW identification to avoid fading

E5D09

16. What happens to reactive power in ideal inductors and capacitors?

• A. Energy is stored in magnetic or electric fields, but power is not dissipated
• B. It is dissipated as heat in the circuit
• C. It is dissipated in the formation of inductive and capacitive fields
• D. It is canceled by Coulomb forces in the capacitor and inductor

E4A05

17. What is the purpose of using a prescaler with a frequency counter?

• A. Reduce the signal frequency to within the counter's operating range
• B. Prevent oscillation in a low-frequency counter circuit
• C. Amplify low-level signals for more accurate counting
• D. Multiply a higher frequency signal so a low-frequency counter can display the operating frequency

E0A11

18. To what should lanyards be attached while climbing?

• A. Tower rungs
• B. Antenna mast
• C. Guy brackets
• D. Tower legs

E2C08

19. Which of the following contacts may be confirmed through the Logbook of The World (LoTW)?

• A. Contacts for Worked All States credit
• B. Contacts between a US station and a non-US station
• C. Special event contacts between stations in the US
• D. All these choices are correct

E4D14

20. What power level does a receiver minimum discernible signal of -100 dBm represent?

• A. 0.1 microwatt
• B. 0.001 microwatts
• C. 100 microwatts
• D. 0.1 picowatts

E9D05

21. Approximately how long is a Yagi's driven element?

• A. 1/2 wavelength
• B. 234 divided by frequency in MHz
• C. 1005 divided by frequency in MHz
• D. 1/4 wavelength

E9E01

22. Which matching system for Yagi antennas requires the driven element to be insulated from the boom?

• A. Shunt-fed
• B. Gamma
• C. T-match
• D. Beta or hairpin

E9B11

23. What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?

• A. The antenna will become mechanically unstable
• B. Ground conductivity will not be accurately modeled
• C. The resulting design will favor radiation of harmonic energy
• D. The computed feed point impedance may be incorrect

E8B09

24. What is deviation ratio?

• A. The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency
• B. The ratio of the highest audio modulating frequency to the average audio modulating frequency
• C. The ratio of the audio modulating frequency to the center carrier frequency
• D. The ratio of the carrier center frequency to the audio modulating frequency

E9H05

25. What challenge is presented by a small wire-loop antenna for direction finding?

• A. It does not have a clearly defined null
• B. All these choices are correct
• C. It has a bidirectional null pattern
• D. It is practical for use only on VHF and higher bands

E5A04

26. What is the magnitude of the impedance of a parallel RLC circuit at resonance?

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

E7F11

27. What sets the minimum detectable signal level for a direct-sampling software defined receiver in the absence of atmospheric or thermal noise?

• A. Sample clock phase noise
• B. Reference voltage level and sample width in bits
• C. Data storage transfer rate
• D. Missing codes and jitter

E7D12

28. What is the dropout voltage of a linear voltage regulator?

• A. Minimum input voltage for rated power dissipation
• B. Maximum output voltage drop when the input voltage is varied over its specified range
• C. Minimum input-to-output voltage required to maintain regulation
• D. Maximum that the output voltage may decrease at rated load

E6B10

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

• A. 3
• B. 1
• C. 6
• D. 2

E1B07

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

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

E2A05

31. What do the letters in a satellite's mode designator specify?

• A. The location of the ground control station
• B. The polarization of uplink and downlink signals
• C. Power limits for uplink and downlink transmissions
• D. The uplink and downlink frequency ranges

E2B04

32. How is color information sent in analog SSTV?

• A. Color is sent in a color burst at the end of each line
• B. Color information is sent on a 2.8 kHz subcarrier
• C. Color lines are sent sequentially
• D. Color is amplitude modulated on the frequency modulated intensity signal

E4E13

33. Where should a station AC surge protector be installed?

• A. At an AC outlet
• B. On a ground rod outside the station
• C. At the AC service panel
• D. On the single point ground panel

E9A07

34. 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

E9C06

35. What is the effect of adding a terminating resistor to a rhombic or long-wire antenna?

• A. It changes the radiation pattern from horizontal to vertical polarization
• B. It decreases the ground loss
• C. It reflects the standing waves on the antenna elements back to the transmitter
• D. It changes the radiation pattern from bidirectional to unidirectional

E7B05

36. What can be done to prevent unwanted oscillations in an RF power amplifier?

• A. Tune the stage for minimum loading
• B. Tune both the input and output for maximum power
• C. Install parasitic suppressors and/or neutralize the stage
• D. Use a phase inverter in the output filter

E7G11

37. 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. 7
• C. 28
• D. 0.07

E5B06

38. 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

E6D08

39. Which of the following materials has the highest temperature stability of its magnetic characteristics?

• A. Aluminum
• B. Ferrite
• C. Brass
• D. Powdered iron

E9F04

40. What impedance does a 1/2-wavelength transmission line present to an RF generator when the line is shorted at the far end?

• A. The same as the output impedance of the RF generator
• B. Very high impedance
• C. Very low impedance
• D. The same as the characteristic impedance of the line

E6E10

41. What advantage does surface-mount technology offer at RF compared to using through-hole components?

• A. Smaller circuit area
• B. Shorter circuit board traces
• C. Components have less parasitic inductance and capacitance
• D. All these choices are correct

E6A03

42. Why does a PN-junction diode not conduct current when reverse biased?

• A. Only P-type semiconductor material can conduct current
• B. Holes in P-type material and electrons in the N-type material are separated by the applied voltage, widening the depletion region
• C. Only N-type semiconductor material can conduct current
• D. Excess holes in P-type material combine with the electrons in N-type material, converting the entire diode into an insulator

E4C14

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

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

E7C07

44. Which describes a Pi-L network?

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

E1A03

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

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

E8A11

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

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

E3B05

47. Which of the following paths is most likely to support long-distance propagation on 160 meters?

• A. Paths at high latitudes
• B. A direct north-south path
• C. A path entirely in darkness
• D. A path entirely in sunlight

E3C07

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

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

E8C07

49. What is the bandwidth of a 4,800-Hz frequency shift, 9,600-baud ASCII FM transmission?

• A. 9.6 kHz
• B. 5.76 kHz
• C. 15.36 kHz
• D. 4.8 kHz

E6F09

50. What is the efficiency of a photovoltaic cell?

• A. The output RF power divided by the input DC power
• B. The output in lumens divided by the input power in watts
• C. The open-circuit voltage divided by the short-circuit current under full illumination
• D. The relative fraction of light that is converted to current