Practice Exam

E2A03

1. How is an upload signal processed by an inverting linear transponder?

• A. The signal is detected and remodulated on the reverse sideband
• B. The signal is passed through a nonlinear filter
• C. The signal is mixed with a local oscillator signal and the difference product is transmitted
• D. The signal is reduced to I and Q components, and the Q component is filtered out

E1C02

2. Which of the following apply to communications transmitted to amateur stations in foreign countries?

• A. All these choices are correct
• B. Communications must be limited to those incidental to the purpose of the amateur service and remarks of a personal nature
• C. All transmissions must be in English
• D. Third party traffic must be limited to that intended for the exclusive use of government and non-Government Organization (NGOs) involved in emergency relief activities

E3A01

3. What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by EME?

• A. 2,000 miles, if the moon is at apogee
• B. 12,000 miles, if the moon is "visible" by both stations
• C. 2,000 miles, if the moon is at perigee
• D. 5,000 miles, if the moon is at perigee

E1E11

4. 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. Three VEs must certify that the examinee is qualified for the license grant and that they have complied with the administering VE requirements
• C. All these choices are correct
• D. Issue the examinee the new or upgrade license

E9E03

5. What matching system uses a short length of transmission line connected in parallel with the feed line at or near the feed point?

• A. Stub match
• B. Delta match
• C. T-match
• D. Gamma match

E1D05

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

E4E04

7. How can conducted noise from an automobile battery charging system be suppressed?

• A. By installing a noise suppression resistor and a blocking capacitor at the battery
• B. By installing filter capacitors in series with the alternator leads
• C. By installing ferrite chokes on the charging system leads
• D. By installing a high-pass filter in series with the radio's power lead and a low-pass filter in parallel with the antenna feed line

E2D02

8. What information replaces signal-to-noise ratio when using the FT8 or FT4 modes in a VHF contest?

• A. Grid square
• B. State abbreviation
• C. Serial number
• D. RST report

E7C02

9. What is the frequency response of a T-network with series capacitors and a shunt inductor?

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

E9C09

10. Which of the following describes a G5RV antenna?

• A. A phased array antenna consisting of multiple loops
• B. A wire antenna center-fed through a specific length of open-wire line connected to a balun and coaxial feed line
• C. A wide band dipole using shorted coaxial cable for the radiating elements and fed with a 4:1 balun
• D. A multi-band trap antenna

E9F01

11. What is the velocity factor of a transmission line?

• A. The ratio of its characteristic impedance to its termination impedance
• B. The ratio of its termination impedance to its characteristic impedance
• C. The velocity of a wave in the transmission line multiplied by the velocity of light in a vacuum
• D. The velocity of a wave in the transmission line divided by the velocity of light in a vacuum

E7D13

12. Which of the following calculates power dissipated by a series linear voltage regulator?

• A. Input voltage multiplied by input current
• B. Voltage difference from input to output multiplied by output current
• C. Output voltage multiplied by output current
• D. Input voltage divided by output current

E6E11

13. What is a characteristic of DIP packaging used for integrated circuits?

• A. Extremely low stray capacitance (dielectrically isolated package)
• B. Two rows of connecting pins on opposite sides of package (dual in-line package)
• C. Extremely high resistance between pins (doubly insulated package)
• D. Two chips in each package (dual in package)

E9A11

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

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

E7A01

15. Which circuit is bistable?

• A. An AND gate
• B. An OR gate
• C. A bipolar amplifier
• D. A flip-flop

E2C06

16. During a VHF/UHF contest, in which band segment would you expect to find the highest level of SSB or CW activity?

• A. In the weak signal segment of the band, with most of the activity near the calling frequency
• B. In the middle of each band, usually on the national calling frequency
• C. In the middle of the band, usually 25 kHz above the national calling frequency
• D. At the top of each band, usually in a segment reserved for contests

E2B09

17. What kind of receiver can be used to receive and decode SSTV using the Digital Radio Mondiale (DRM) protocol?

• A. AM
• B. CDMA
• C. SSB
• D. AREDN

E3C03

18. Which of the following signal paths is most likely to experience high levels of absorption when the A-index or K-index is elevated?

• A. Transequatorial
• B. NVIS
• C. Sporadic-E
• D. Through the auroral oval

E6A02

19. Which of the following semiconductor materials contains excess free electrons?

• A. N-type
• B. P-type
• C. Bipolar
• D. Insulated gate

E8B03

20. What is the modulation index of an FM phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency if the highest modulating frequency is 1000 Hz?

• A. 0.6
• B. 0.3
• C. 6
• D. 3

E6B11

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

• A. Capacitance of an RF coupling capacitor
• B. A variable RF reference voltage
• C. Forward DC bias current
• D. Reverse voltage larger than the RF signal

E7B10

22. In Figure E7-1, what is the purpose of R1 and R2?

• A. Voltage divider bias
• B. Feedback
• C. Load resistors
• D. Self bias

E7H03

23. What is a phase-locked loop?

• A. An electronic servo loop consisting of a phase detector, a low-pass filter, a voltage-controlled oscillator, and a stable reference oscillator
• B. An electronic circuit also known as a monostable multivibrator
• C. An electronic circuit consisting of a precision push-pull amplifier with a differential phase input
• D. An electronic servo loop consisting of a ratio detector, reactance modulator, and voltage-controlled oscillator

E4C01

24. What is an effect of excessive phase noise in an SDR receiver's master clock oscillator?

• A. It can combine with strong signals on nearby frequencies to generate interference
• B. It limits the receiver's ability to receive strong signals
• C. It decreases the receiver's third-order intercept point
• D. It can affect the receiver's frequency calibration

E1B05

25. What is the National Radio Quiet Zone?

• A. An area in New Mexico surrounding the White Sands Test Area
• B. An area surrounding the FCC monitoring station in Laurel, Maryland
• C. An area surrounding the National Radio Astronomy Observatory
• D. An area in Florida surrounding Cape Canaveral

E5B10

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

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

E6D01

27. What is piezoelectricity?

• A. The ability of materials to generate voltage when an electromagnetic wave of a certain frequency is applied
• B. A characteristic of materials that generate a voltage when stressed and that flex when a voltage is applied
• C. The ability of materials to generate electromagnetic waves of a certain frequency when voltage is applied
• D. A characteristic of materials that have an index of refraction which depends on the polarization of the electromagnetic wave passing through it

E8A01

28. What technique shows that a square wave is made up of a sine wave and its odd harmonics?

• A. Differential analysis
• B. Vector analysis
• C. Fourier analysis
• D. Numerical analysis

E5A02

29. What is the resonant frequency of an RLC circuit if R is 22 ohms, L is 50 microhenries, and C is 40 picofarads?

• A. 1.78 MHz
• B. 3.56 MHz
• C. 44.72 MHz
• D. 22.36 MHz

E9B05

30. What type of antenna pattern is shown in Figure E9-2?

• A. Polarization
• B. Near field
• C. Elevation
• D. Azimuth

E3B13

31. What type of polarization is supported by ground-wave propagation?

• A. Elliptical
• B. Vertical
• C. Horizontal
• D. Circular

E5C09

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

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

E9D10

33. How does radiation resistance of a base-fed whip antenna change below its resonant frequency?

• A. Radiation resistance becomes imaginary
• B. Radiation resistance does not depend on frequency
• C. Radiation resistance increases
• D. Radiation resistance decreases

E6F08

34. Why are optoisolators often used in conjunction with solid-state circuits that control 120 VAC circuits?

• A. Optoisolators provide impedance matching between the control circuit and power circuit
• B. Optoisolators provide a low-impedance link between a control circuit and a power circuit
• C. Optoisolators provide an electrical isolation between a control circuit and the circuit being switched
• D. Optoisolators eliminate the effects of reflected light in the control circuit

E1A04

35. May an Extra class operator answer the CQ of a station on 3.601 MHz LSB phone?

• A. Yes, the entire signal will be inside the SSB allocation for Extra class operators
• B. No, the sideband components will extend beyond the edge of the phone band segment
• C. No, US stations are not permitted to use phone emissions below 3.610 MHz
• D. Yes, the displayed frequency is within the 75-meter phone band segment

E1F03

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

E4B01

37. Which of the following factors most affects the accuracy of a frequency counter?

• A. Time base accuracy
• B. Decade divider accuracy
• C. Temperature coefficient of the logic
• D. Input attenuator accuracy

E7F01

38. What is meant by "direct sampling" in software defined radios?

• A. I and Q signals are generated by digital processing without the use of RF amplification
• B. Incoming RF is digitized by an analog-to-digital converter without being mixed with a local oscillator signal
• C. Software is converted from source code to object code during operation of the receiver
• D. A switching mixer is used to generate I and Q signals directly from the RF input

E4D09

39. What is the purpose of the preselector in a communications receiver?

• A. To provide broadband attenuation before the first RF stage to prevent intermodulation
• B. To store frequencies that are often used
• C. To increase the rejection of signals outside the band being received
• D. To allow selection of the optimum RF amplifier device

E9H07

40. What is the function of a Beverage antenna's termination resistor?

• A. Absorb signals from the reverse direction
• B. Eliminate harmonic reception
• C. Increase the front-to-side ratio
• D. Decrease SWR bandwidth

E4A04

41. How is compensation of an oscilloscope probe performed?

• A. A DC voltage standard is displayed, and the probe is adjusted until the displayed voltage is accurate
• B. A high frequency sine wave is displayed, and the probe is adjusted for maximum amplitude
• C. A square wave is displayed, and the probe is adjusted until the horizontal portions of the displayed wave are as nearly flat as possible
• D. A frequency standard is displayed, and the probe is adjusted until the deflection time is accurate

E5D01

42. What is the result of conductor skin effect?

• A. Resistance increases as temperature increases because of the change in thermal coefficient
• B. Resistance decreases as frequency increases because electron mobility increases
• C. Resistance increases as frequency increases because RF current flows closer to the surface
• D. Resistance decreases as temperature increases because of the change in thermal coefficient

E2E02

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

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

E7E01

44. Which of the following can be used to generate FM phone signals?

• A. Reactance modulation of a local oscillator
• B. Balanced modulation of the audio amplifier
• C. Balanced modulation of a local oscillator
• D. Reactance modulation of the final amplifier

E8C11

45. What is the relationship between symbol rate and baud?

• A. The relationship depends on the specific code used
• B. Baud rate is half the symbol rate
• C. Baud is twice the symbol rate
• D. They are the same

E9G02

46. What type of coordinate system is used in a Smith chart?

• A. Resistance circles and reactance arcs
• B. Voltage chords and current chords
• C. Voltage circles and current arcs
• D. Resistance lines and reactance chords

E8D02

47. What spread spectrum communications technique uses a high-speed binary bit stream to shift the phase of an RF carrier?

• A. Frequency hopping
• B. Phase compandored spread spectrum
• C. Direct sequence
• D. Binary phase-shift keying

E0A12

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

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

E7G09

49. What will be the output voltage of the circuit shown in Figure E7-3 if R1 is 1,000 ohms, RF is 10,000 ohms, and 0.23 volts DC is applied to the input?

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

E6C06

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

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