Practice Exam

E2E06

1. What is the length of an FT8 transmission cycle?

• A. It varies with the amount of data
• B. 30 seconds
• C. 8 seconds
• D. 15 seconds

E1A08

2. If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?

• A. The control operators of all the stations in the system
• B. The control operator of the packet bulletin board station
• C. The control operator of the originating station
• D. The control operators of all the stations in the system not authenticating the source from which they accept communications

E9A11

3. Which of the following determines ground losses for a ground-mounted vertical antenna operating on HF?

• A. Soil conductivity
• B. Take-off angle
• C. The standing wave ratio
• D. Distance from the transmitter

E8B09

4. What is deviation ratio?

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

E8D08

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

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

E7G02

6. What is the frequency response of the circuit in E7-3 if a capacitor is added across the feedback resistor?

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

E6F04

7. What is the photovoltaic effect?

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

E5D06

8. What parasitic characteristic creates an inductor's self-resonance?

• A. Skin effect
• B. Dielectric loss
• C. Inter-turn capacitance
• D. Coupling

E9D09

9. What is the function of a loading coil in an electrically short antenna?

• A. To lower the Q
• B. To lower the losses
• C. To resonate the antenna by cancelling the capacitive reactance
• D. To increase the SWR bandwidth by increasing net reactance

E8C12

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

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

E2A01

11. What is the direction of an ascending pass for an amateur satellite?

• A. From west to east
• B. From north to south
• C. From south to north
• D. From east to west

E9H04

12. What is the purpose of placing an 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 eliminates unbalanced capacitive coupling to the antenna's surroundings, improving the depth of its nulls
• D. It increases signal strength by providing a better match to the feed line

E1F04

13. Which of the following geographic descriptions approximately describes "Line A"?

• A. A line roughly parallel to and west of the US Atlantic coastline
• B. A line roughly parallel to and east of the US Pacific coastline
• C. A line roughly parallel to and north of the border between the US and Mexico
• D. A line roughly parallel to and south of the border between the US and Canada

E4A10

14. Which trigger mode is most effective when using an oscilloscope to measure a linear power supply's output ripple?

• A. Edge
• B. Line
• C. Level
• D. Single-shot

E2B01

15. In digital television, what does a coding rate of 3/4 mean?

• A. Data compression reduces data rate by 3/4
• B. Three, four-bit words are used to transmit each pixel
• C. 1/4 of the time interval is used as a guard interval
• D. 25% of the data sent is forward error correction data

E2C08

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

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

E4E05

17. What is used to suppress radio frequency interference from a line-driven AC motor?

• A. A bypass choke in parallel with the motor's field winding
• B. A high-pass filter in series with the motor's power leads
• C. A bypass capacitor in series with the motor's field winding
• D. A brute-force AC-line filter in series with the motor's power leads

E1C03

18. How long must an operator wait after filing a notification with the Utilities Technology Council (UTC) before operating on the 2200-meter or 630-meter band?

• A. Operators may operate after 30 days, providing they have not been told that their station is within 1 kilometer of PLC systems using those frequencies
• B. Operators must not operate until approval is received
• C. Operations may commence immediately, and may continue unless interference is reported by the UTC
• D. Operators may not operate until a test signal has been transmitted in coordination with the local power company

E7D05

19. Which of the following types of linear voltage regulator operates by loading the unregulated voltage source?

• A. A constant current source
• B. A shunt regulator
• C. A series regulator
• D. A shunt current source

E6B09

20. What is a common use for point-contact diodes?

• A. As a high-voltage rectifier
• B. As a constant current source
• C. As an RF detector
• D. As a constant voltage source

E1D05

21. What must be posted at the location of a station being operated by telecommand on or within 50 kilometers of the Earth's surface?

• A. A label with the name, address, and telephone number of the station licensee
• B. All these choices are correct
• C. A photocopy of the station license
• D. A label with the name, address, and telephone number of the control operator

E6D03

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

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

E4C12

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

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

E1B07

24. 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

E3B03

25. At what time of day is transequatorial propagation most likely to occur?

• A. Noon
• B. Afternoon or early evening
• C. Late at night
• D. Morning

E7E02

26. What is the function of a reactance modulator?

• A. Produce PM or FM signals by varying a resistance
• B. Produce PM or FM signals by varying a capacitance
• C. Produce AM signals by varying an inductance
• D. Produce AM signals by varying a resistance

E9C04

27. What happens to the radiation pattern of an unterminated long wire antenna as the wire length is increased?

• A. Fewer lobes form with the major lobes increasing closer to broadside to the wire
• B. The elevation angle increases, and the front-to-rear ratio decreases
• C. The elevation angle increases, while the front-to-rear ratio is unaffected
• D. Additional lobes form with major lobes increasingly aligned with the axis of the antenna

E5C09

28. When using rectangular coordinates to graph the impedance of a circuit, what do the axes represent?

• A. The X axis represents the magnitude, and the Y axis represents the phase angle
• B. The X axis represents the reactive component, and the Y axis represents the resistive component
• C. The X axis represents the phase angle, and the Y axis represents the magnitude
• D. The X axis represents the resistive component, and the Y axis represents the reactive component

E7A10

29. What is a truth table?

• A. A list of inputs and corresponding outputs for a digital device
• B. A diagram showing logic states when the digital gate output is true
• C. A list of inputs and corresponding outputs for an op-amp
• D. A table of logic symbols that indicate the logic states of an op-amp

E4D06

30. What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

• A. Desensitization
• B. Cross modulation interference
• C. Quieting
• D. Reciprocal mixing

E1E03

31. What is a Volunteer Examiner Coordinator?

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

E5A08

32. What is the phase relationship between the current through and the voltage across a series resonant circuit at resonance?

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

E7B09

33. What is characteristic of an emitter follower (or common collector) amplifier?

• A. Input and output signals in-phase
• B. Differential inputs and single output
• C. Acts as an OR circuit if one input is grounded
• D. Low input impedance and phase inversion from input to output

E7H01

34. What are three common oscillator circuits?

• A. Pierce, Fenner, and Beane
• B. Colpitts, Hartley, and Pierce
• C. Taft, Pierce, and negative feedback
• D. Taft, Hartley, and Pierce

E9E04

35. What is the purpose of the series capacitor in a gamma match?

• A. To transform the antenna impedance to a higher value
• B. To provide DC isolation between the feed line and the antenna
• C. To cancel unwanted inductive reactance
• D. To provide a rejection notch that prevents the radiation of harmonics

E2D04

36. What technology is used for real-time tracking of balloons carrying amateur radio transmitters?

• A. PACTOR III
• B. Bandwidth compressed LORAN
• C. APRS
• D. FT8

E3C06

37. How does the VHF/UHF radio horizon compare to the geographic horizon?

• A. It is approximately 50 percent farther
• B. They are approximately the same
• C. It is approximately 20 percent nearer
• D. It is approximately 15 percent farther

E7C05

38. Which filter type has ripple in the passband and a sharp cutoff?

• A. A passive op-amp filter
• B. A Chebyshev filter
• C. A Butterworth filter
• D. An active LC filter

E0A12

39. Where should a shock-absorbing lanyard be attached to a tower when working above ground?

• A. Even with the climber's waist
• B. Above the climber's head level
• C. To the belt of the fall-arrest harness
• D. To the next lowest set of guys

E4B09

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

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

E9G01

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

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

E6E08

42. How is power supplied to the most common type of MMIC?

• A. Directly to the bias voltage (Vcc) lead
• B. Through a capacitor and RF choke connected to the amplifier input lead
• C. Through a resistor and/or RF choke connected to the amplifier output lead
• D. MMICs require no operating bias

E8A08

43. Why are direct or flash conversion analog-to-digital converters used for a software defined radio?

• A. Very high speed allows digitizing high frequencies
• B. Very low power consumption decreases frequency drift
• C. Immunity to out-of-sequence coding reduces spurious responses
• D. All these choices are correct

E6A01

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

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

E3A12

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

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

E5B10

46. What is the relationship between the AC current through an inductor and the voltage across an inductor?

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

E9B04

47. What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

• A. 15 dB
• B. 38 dB
• C. 3 dB
• D. 28 dB

E6C06

48. Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?

• A. Bandwidth is very limited
• B. Large bypass capacitance is inherent
• C. The input switching threshold is about twice the power supply voltage
• D. The input switching threshold is about half the power supply voltage

E9F10

49. What impedance does a 1/8-wavelength transmission line present to an RF generator when the line is shorted at the far end?

• A. Zero
• B. The same as the characteristic impedance of the line
• C. A capacitive reactance
• D. An inductive reactance

E7F02

50. What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal?

• A. A Hilbert-transform filter
• B. A crystal-lattice filter
• C. An adaptive filter
• D. A phase-inverting filter