Practice Exam

E2D03

1. Which of the following digital modes is designed for EME communications?

• A. PACTOR III
• B. MSK144
• C. WSPR
• D. Q65

E5A01

2. What can cause the voltage across reactances in a series RLC circuit to be higher than the voltage applied to the entire circuit?

• A. Resonance
• B. Capacitance
• C. Resistance
• D. Low quality factor (Q)

E2A01

3. 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

E1E08

4. To which of the following examinees may a VE not administer an examination?

• A. Friends of the VE
• B. Employees of the VE
• C. Relatives of the VE as listed in the FCC rules
• D. All these choices are correct

E4A10

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

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

E6B08

6. Which of the following is a Schottky barrier diode?

• A. Electrolytic rectifier
• B. PIN junction
• C. Thermionic emission diode
• D. Metal-semiconductor junction

E7G08

7. How does the gain of an ideal operational amplifier vary with frequency?

• A. It increases linearly with increasing frequency
• B. It decreases logarithmically with increasing frequency
• C. It decreases linearly with increasing frequency
• D. It does not vary with frequency

E5D05

8. What parasitic characteristic causes electrolytic capacitors to be unsuitable for use at RF?

• A. Skin effect
• B. Dielectric leakage
• C. Inductance
• D. Shunt capacitance

E4D06

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

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

E5B10

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

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

E3C09

11. What type of data is reported by amateur radio propagation reporting networks?

• A. Electric field intensity
• B. Magnetic declination
• C. Solar flux
• D. Digital-mode and CW signals

E7D05

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

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

E1C09

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

• A. 3.0
• B. 2.0
• C. 1.0
• D. 0.5

E4B04

14. Which S parameter represents input port return loss or reflection coefficient (equivalent to VSWR)?

• A. S11
• B. S22
• C. S21
• D. S12

E2E03

15. To what does the "4" in FT4 refer?

• A. Four-tone continuous-phase frequency shift keying
• B. All these choices are correct
• C. Multiples of 4 bits of user information
• D. Four transmit/receive cycles per minute

E9H04

16. What is the purpose of placing an electrostatic shield around a small-loop direction-finding antenna?

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

E9A01

17. What is an isotropic radiator?

• A. A calibrated, unidirectional antenna used to make precise antenna gain measurements
• B. A hypothetical, lossless antenna having equal radiation intensity in all directions used as a reference for antenna gain
• C. A spacecraft antenna used to direct signals toward Earth
• D. An omnidirectional, horizontally polarized, precisely calibrated antenna used to make field measurements of antenna gain

E6C03

18. What is tri-state logic?

• A. Logic with three output impedances which can be selected to better match the load impedance
• B. Logic devices with 0, 1, and high-impedance output states
• C. Logic devices that utilize ternary math
• D. A counter with eight states

E1A01

19. Why is it not legal to transmit a 3 kHz bandwidth USB signal with a carrier frequency of 14.348 MHz?

• A. The lower 1 kHz of the signal is outside the 20-meter band
• B. USB is not used on 20-meter phone
• C. The upper 1 kHz of the signal is outside the 20-meter band
• D. 14.348 MHz is outside the 20-meter band

E9D09

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

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

E7F04

21. Which method generates an SSB signal using digital signal processing?

• A. Varying quartz crystal characteristics are emulated in digital form
• B. Mixing products are converted to voltages and subtracted by adder circuits
• C. Signals are combined in quadrature phase relationship
• D. A frequency synthesizer removes unwanted sidebands

E6F07

22. What is a solid-state relay?

• A. A mechanical relay that latches in the on or off state each time it is pulsed
• B. A semiconductor switch that uses a monostable multivibrator circuit
• C. A device that uses semiconductors to implement the functions of an electromechanical relay
• D. A relay that uses transistors to drive the relay coil

E8C02

23. What is the definition of symbol rate in a digital transmission?

• A. The maximum rate at which the forward error correction code can make corrections
• B. The number of characters carried per second by the station-to-station link
• C. The rate at which the waveform changes to convey information
• D. The number of control characters in a message packet

E6A04

24. What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?

• A. N-type impurity
• B. Insulator impurity
• C. Donor impurity
• D. Acceptor impurity

E1F05

25. Amateur stations may not transmit in which of the following frequency segments if they are located in the contiguous 48 states and north of Line A?

• A. 222 MHz - 223 MHz
• B. 440 MHz - 450 MHz
• C. 420 MHz - 430 MHz
• D. 53 MHz - 54 MHz

E6D11

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

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

E3B04

27. What are "extraordinary" and "ordinary" waves?

• A. Long-path and short-path waves
• B. Independently propagating, elliptically polarized waves created in the ionosphere
• C. Extraordinary waves exhibit rare long-skip propagation, compared to ordinary waves, which travel shorter distances
• D. Refracted rays and reflected waves

E5C11

28. Which point in Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and an 18-microhenry inductor at 3.505 MHz?

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

E6E02

29. Which of the following device packages is a through-hole type?

• A. DIP
• B. SOT
• C. BGA
• D. PLCC

E9E09

30. Which of the following is used to shunt feed a grounded tower at its base?

• A. Double-bazooka match
• B. Gamma match
• C. Beta or hairpin match
• D. All these choices are correct

E7H03

31. What is a phase-locked loop?

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

E8B09

32. 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

E1B07

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

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

E4E14

34. What is the purpose of a single point ground panel?

• A. Ensure all lightning protectors activate at the same time
• B. Remove AC power in case of a short-circuit
• C. Prevent common-mode transients in multi-wire systems
• D. Eliminate air gaps between protected and non-protected circuits

E9B07

35. What is the difference in radiated power between a lossless antenna with gain and an isotropic radiator driven by the same power?

• A. The power radiated from the directional antenna is increased by the gain of the antenna
• B. The power radiated from the isotropic radiator is 2.15 dB greater than that from the directional antenna
• C. They are the same
• D. The power radiated from the directional antenna is stronger by its front-to-back ratio

E1D07

36. Which of the following HF amateur bands include allocations for space stations?

• A. 30 meters, 17 meters, and 10 meters
• B. 40 meters, 20 meters, 15 meters, and 10 meters
• C. Only 10 meters
• D. Satellite operation is permitted on all HF bands

E0A06

37. Why are there separate electric (E) and magnetic (H) MPE limits at frequencies below 300 MHz?

• A. E field and H field radiation intensity peaks can occur at different locations
• B. All these choices are correct
• C. Ground reflections and scattering cause the field strength to vary with location
• D. The body reacts to electromagnetic radiation from both the E and H fields

E9C13

38. How does the radiation pattern of a horizontally polarized antenna vary with increasing height above ground?

• A. The horizontal beamwidth increases
• B. The horizontal beamwidth decreases
• C. The takeoff angle of the lowest elevation lobe decreases
• D. The takeoff angle of the lowest elevation lobe increases

E3A09

39. Which of the following frequency ranges is most suited for meteor-scatter communications?

• A. 1.8 MHz - 1.9 MHz
• B. 28 MHz - 148 MHz
• C. 220 MHz - 450 MHz
• D. 10 MHz - 14 MHz

E4C07

40. What does the MDS of a receiver represent?

• A. The maximum detectable spectrum
• B. The minimum discernible signal
• C. The modulation distortion specification
• D. The meter display sensitivity

E9F08

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

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

E8D03

42. Which describes spread spectrum frequency hopping?

• A. RF signals are clipped to generate a wide band of harmonics which provides redundancy to correct errors
• 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. A binary bit stream is used to shift the phase of an RF carrier very rapidly in a pseudorandom sequence

E7E08

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

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

E9G01

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

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

E8A10

45. What is the purpose of a low-pass filter used at the output of a digital-to-analog converter?

• A. Improve accuracy by removing out-of-sequence codes from the input
• B. Remove spurious sampling artifacts from the output signal
• C. All these choices are correct
• D. Lower the input bandwidth to increase the effective resolution

E2B10

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

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

E7A03

47. 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

E7C05

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

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

E7B03

49. What circuit is required at the output of an RF switching amplifier?

• A. A matched load resistor to prevent damage by switching transients
• B. A high-pass filter to compensate for low gain at low frequencies
• C. A temperature compensating load resistor to improve linearity
• D. A filter to remove harmonic content

E2C02

50. Which of the following file formats is used for exchanging amateur radio log data?

• A. NEC
• B. ADIF
• C. OCF
• D. ARLD