Practice Exam

E0A08

1. What does SAR measure?

• A. Signal attenuation ratio
• B. Signal amplification rating
• C. The rate of RF energy reflected from stationary terrain
• D. The rate at which RF energy is absorbed by the body

E5C08

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

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

E4A01

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

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

E4B08

4. 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 ratio of inductive reactance to capacitive reactance
• D. The frequency shift

E7G10

5. 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. 76
• C. 1
• D. 0.03

E7A03

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

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

E9C01

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

E2E07

8. How does Q65 differ from JT65?

• A. All these choices are correct
• B. Keyboard-to keyboard operation is supported
• C. Multiple receive cycles are averaged
• D. Quadrature modulation is used

E3B12

9. What is chordal-hop propagation?

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

E3A12

10. What is most likely to result in auroral propagation?

• A. Severe geomagnetic storms
• B. Quiet geomagnetic conditions
• C. Meteor showers
• D. Extreme low-pressure areas in polar regions

E1F02

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

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

E6F04

12. What is the photovoltaic effect?

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

E3C02

13. What is indicated by a rising A-index or K-index?

• A. An increase in the critical frequency
• B. Higher levels of solar UV radiation
• C. Increasing disturbance of the geomagnetic field
• D. Decreasing disturbance of the geomagnetic field

E6C09

14. What is used to design the configuration of a field-programmable gate array (FPGA)?

• A. An auto-router
• B. Hardware description language (HDL)
• C. Machine and assembly language
• D. Karnaugh maps

E9A07

15. 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. 632 watts
• B. 252 watts
• C. 159 watts
• D. 63.2 watts

E8C01

16. What is Quadrature Amplitude Modulation or QAM?

• A. A technique for digital data compression used in digital television which removes redundancy in the data by comparing bit amplitudes
• B. Transmission of data by modulating the amplitude of two carriers of the same frequency but 90 degrees out of phase
• C. A method of performing single sideband modulation by shifting the phase of the carrier and modulation components of the signal
• D. A technique for analog modulation of television video signals using phase modulation and compression

E7F06

17. What is the minimum number of bits required to sample a signal with a range of 1 volt at a resolution of 1 millivolt?

• A. 6 bits
• B. 4 bits
• C. 10 bits
• D. 8 bits

E6D11

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

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

E9B06

19. What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?

• A. 75 degrees
• B. 7.5 degrees
• C. 25 degrees
• D. 45 degrees

E9D06

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

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

E9G04

21. What are the two families of circles and arcs that make up a Smith chart?

• A. Resistance and reactance
• B. Inductance and capacitance
• C. Voltage and impedance
• D. Reactance and voltage

E6E07

22. What type of transmission line is often used for connections to MMICs?

• A. Miniature coax
• B. Parallel wire
• C. Microstrip
• D. Circular waveguide

E1D03

23. 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 that transmits communications to initiate, modify, or terminate functions of a space station
• 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 located in a satellite or a balloon more than 50 kilometers above the surface of the Earth

E2C03

24. From which of the following bands is amateur radio contesting generally excluded?

• A. 33 centimeters
• B. 6 meters
• C. 30 meters
• D. 70 centimeters

E4C08

25. An SDR receiver is overloaded when input signals exceed what level?

• A. The reference voltage of the analog-to-digital converter
• B. The maximum count value of the analog-to-digital converter
• C. One-half of the maximum sampling buffer size
• D. One-half of the maximum sample rate

E9E05

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

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

E8A04

27. What is "dither" with respect to analog-to-digital converters?

• A. An error caused by irregular quantization step size
• B. A method of decimation by randomly skipping samples
• C. An abnormal condition where the converter cannot settle on a value to represent the signal
• D. A small amount of noise added to the input signal to reduce quantization noise

E9H08

28. What is the function of a sense antenna?

• A. It provides diversity reception that cancels multipath signals
• B. It allows DF antennas to receive signals at different vertical angles
• C. It increases the sensitivity of a DF antenna array
• D. It modifies the pattern of a DF antenna to provide a null in only one direction

E5D08

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

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

E7E05

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

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

E7D12

31. 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. Maximum that the output voltage may decrease at rated load
• D. Minimum input-to-output voltage required to maintain regulation

E7B12

32. What type of amplifier circuit is shown in Figure E7-1?

• A. Common emitter
• B. Common base
• C. Emitter follower
• D. Common collector

E7H02

33. What is a microphonic?

• A. Changes in oscillator frequency caused by mechanical vibration
• B. An IC used for amplifying microphone signals
• C. Excess loading of the microphone by an oscillator
• D. Distortion caused by RF pickup on the microphone cable

E7C10

34. Which of the following filters is used in a 2-meter band repeater duplexer?

• A. A cavity filter
• B. A crystal filter
• C. A DSP filter
• D. An L-C filter

E5B08

35. What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 300 ohms, R is 100 ohms, and XL is 100 ohms?

• A. 27 degrees with the voltage lagging the current
• B. 63 degrees with the voltage leading the current
• C. 63 degrees with the voltage lagging the current
• D. 27 degrees with the voltage leading the current

E8D08

36. What parameter evaluates distortion of an AFSK signal caused by excessive input audio levels?

• A. Intermodulation Distortion (IMD)
• B. Repeat Request Rate (RRR)
• C. Baud error rate
• D. Signal-to-noise ratio

E5A10

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

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

E2A09

38. What do the terms "L band" and "S band" specify?

• A. Which sideband to use
• B. The 23- and 13-centimeter bands
• C. The 2-meter and 70-centimeter bands
• D. FM and digital store-and-forward systems

E1A03

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

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

E6A05

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

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

E2B10

41. What aspect of an analog slow-scan television signal encodes the brightness of the picture?

• A. Tone frequency
• B. Sync amplitude
• C. Tone amplitude
• D. Sync frequency

E1E05

42. What must the VE team do with the application form if the examinee does not pass the exam?

• A. Maintain the application form with the VEC's records
• B. Send the application form to the FCC and inform the FCC of the grade
• C. Return the application document to the examinee
• D. Destroy the application form

E6B05

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

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

E4E08

44. What current flows equally on all conductors of an unshielded multiconductor cable?

• A. Common-mode current
• B. Differential-mode current
• C. Reactive current only
• D. Magnetically-coupled current only

E9F02

45. Which of the following has the biggest effect on the velocity factor of a transmission line?

• A. The transmission line length
• B. The characteristic impedance
• C. The insulating dielectric material
• D. The center conductor resistivity

E2D09

46. What type of modulation is used by JT65?

• A. PSK
• B. Multitone AFSK
• C. RTTY
• D. QAM

E8B06

47. 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. 47
• D. 2.14

E4D08

48. What causes intermodulation in an electronic circuit?

• A. Negative feedback
• B. Lack of neutralization
• C. Positive feedback
• D. Nonlinear circuits or devices

E1B04

49. What must the control operator of a repeater operating in the 70-centimeter band do if a radiolocation system experiences interference from that repeater?

• A. File an FAA NOTAM (Notice to Air Missions) with the repeater system's ERP, call sign, and six-character grid locator
• B. Reduce the repeater antenna HAAT (Height Above Average Terrain)
• C. Cease operation or make changes to the repeater that mitigate the interference
• D. All these choices are correct

E1C05

50. Under what situation may a station transmit third party communications while being automatically controlled?

• A. Only when transmitting RTTY or data emissions
• B. Only when transmitting SSB or CW
• C. On any mode approved by the National Telecommunication and Information Administration
• D. Never