Practice Exam

E8D10

1. What are some of the differences between the Baudot digital code and ASCII?

• A. Baudot uses 6 data bits per character, ASCII uses 7 or 8; Baudot has no letters/figures shift code, ASCII uses 2 letters/figures shift codes
• B. Baudot uses 5 data bits per character, ASCII uses 7 or 8; Baudot uses 2 characters as letters/figures shift codes, ASCII has no letters/figures shift code
• C. Baudot uses 7 data bits per character, ASCII uses 8; Baudot has no letters/figures shift code, ASCII uses 2 letters/figures shift codes
• D. Baudot uses 4 data bits per character, ASCII uses 7 or 8; Baudot uses 1 character as a letters/figures shift code, ASCII has no letters/figures code

E5A09

2. How is the Q of an RLC parallel resonant circuit calculated?

• A. Reactance of either the inductance or capacitance multiplied by the resistance
• B. Reactance of the inductance multiplied by the reactance of the capacitance
• C. Resistance divided by the reactance of either the inductance or capacitance
• D. Reactance of either the inductance or capacitance divided by the resistance

E9E04

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

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

E7D13

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

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

E7F07

5. What function is performed by a Fast Fourier Transform?

• A. Converting signals from the time domain to the frequency domain
• B. Converting digital signals to analog form
• C. Converting signals from the frequency domain to the time domain
• D. Converting analog signals to digital form

E4E13

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

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

E7G02

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

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

E3A09

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

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

E6C06

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

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

E1E11

10. 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. Issue the examinee the new or upgrade license
• B. Photocopy all examination documents and forward them to the FCC for processing
• 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

E4C06

11. How much does increasing a receiver's bandwidth from 50 Hz to 1,000 Hz increase the receiver's noise floor?

• A. 5 dB
• B. 13 dB
• C. 3 dB
• D. 10 dB

E2E12

12. How do ALE stations establish contact?

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

E1C05

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

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

E4B02

14. What is the significance of voltmeter sensitivity expressed in ohms per volt?

• A. The full scale reading in amps divided by ohms per volt rating will determine the size of shunt needed
• B. The full scale reading of the voltmeter multiplied by its ohms per volt rating is the input impedance of the voltmeter
• C. The reading in volts multiplied by the ohms per volt rating will determine the power drawn by the device under test
• D. The reading in ohms divided by the ohms per volt rating will determine the voltage applied to the circuit

E9G06

15. On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

• A. Polar axis
• B. Reactance axis
• C. Impedance axis
• D. Prime axis

E0A07

16. What is meant by "100% tie-off" regarding tower safety?

• A. All tools secured to the climber's harness
• B. All circuit breakers feeding power to the tower must be tied closed with tape, cable, or ties
• C. All loose ropes and guys secured to a fixed structure
• D. At least one lanyard attached to the tower at all times

E6E07

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

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

E5D11

18. How much real power is consumed in a circuit consisting of a 100-ohm resistor in series with a 100-ohm inductive reactance drawing 1 ampere?

• A. 70.7 watts
• B. 200 watts
• C. 141.4 watts
• D. 100 watts

E1A03

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

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

E1D04

20. Which of the following is required in the identification transmissions from a balloon-borne telemetry station?

• A. The output power of the balloon transmitter
• B. All these choices are correct
• C. Call sign
• D. The station's six-character Maidenhead grid locator

E2C08

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

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

E5C02

22. How are impedances described in polar coordinates?

• A. By magnitude and phase angle
• B. By X and R values
• C. By real and imaginary parts
• D. By Y and G values

E9H11

23. What feature of a cardioid pattern antenna makes it useful for direction-finding antennas?

• A. A single null
• B. A very sharp peak
• C. High radiation angle
• D. Broadband response

E4D11

24. Why are odd-order intermodulation products, created within a receiver, of particular interest compared to other products?

• A. Odd-order intermodulation produces three products for every input signal within the band of interest
• B. Odd-order products of two signals in the band being received are also likely to be within the band
• C. Odd-order products are an indication of poor image rejection
• D. Odd-order products are more likely to overload the IF filters

E9F03

25. Why is the electrical length of a coaxial cable longer than its physical length?

• A. Skin effect is more pronounced in the coaxial cable
• B. Electromagnetic waves move faster in coaxial cable than in air
• C. Electromagnetic waves move more slowly in a coaxial cable than in air
• D. Skin effect is less pronounced in the coaxial cable

E3C01

26. What is the cause of short-term radio blackouts?

• A. Sunspots on the solar equator
• B. Coronal mass ejections
• C. Solar flares
• D. North-oriented interplanetary magnetic field

E2D11

27. How do APRS stations relay data?

• A. By DMR repeaters
• B. By C4FM repeaters
• C. By packet digipeaters
• D. By packet ACK/NAK relay

E7E10

28. How does a diode envelope detector function?

• A. By breakdown of the Zener voltage
• B. By mixing signals with noise in the transition region of the diode
• C. By rectification and filtering of RF signals
• D. By sensing the change of reactance in the diode with respect to frequency

E2B01

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

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

E9B04

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

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

E8B07

31. Orthogonal frequency-division multiplexing (OFDM) is a technique used for which types of amateur communication?

• A. Extremely low-power contacts
• B. EME
• C. OFDM signals are not allowed on amateur bands
• D. Digital modes

E7B03

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

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

E2A10

33. What type of satellite appears to stay in one position in the sky?

• A. Geomagnetic
• B. LEO
• C. Geostationary
• D. HEO

E7C03

34. What is the purpose of adding an inductor to a Pi-network to create a Pi-L-network?

• A. Greater transformation range
• B. To eliminate one capacitor
• C. Higher efficiency
• D. Greater harmonic suppression

E8C05

35. What is the approximate bandwidth of a 13-WPM International Morse Code transmission?

• A. 104 Hz
• B. 13 Hz
• C. 26 Hz
• D. 52 Hz

E7A08

36. What logical operation does an OR gate perform?

• A. It produces a 0 at its output if all inputs are 1
• B. It produces a 1 at its output if any input is 1
• C. It produces a 1 at its output if all inputs are 0
• D. It produces a 0 at its output if some but not all inputs are 1

E6F02

37. What happens to photoconductive material when light shines on it?

• A. Resistance increases
• B. Reflectivity decreases
• C. Reflectivity increases
• D. Resistance decreases

E6A03

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

• A. Excess holes in P-type material combine with the electrons in N-type material, converting the entire diode into an insulator
• 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 P-type semiconductor material can conduct current
• D. Only N-type semiconductor material can conduct current

E4A11

39. Which of the following can be measured with an antenna analyzer?

• A. Velocity factor
• B. Cable length
• C. Resonant frequency of a tuned circuit
• D. All these choices are correct

E1F07

40. When may an amateur station send a message to a business?

• A. At no time
• B. When the pecuniary interest of the amateur or his or her employer is less than $25
• C. When neither the amateur nor their employer has a pecuniary interest in the communications
• D. When the pecuniary interest of the amateur or his or her employer is less than $50

E6D04

41. Why are cores of inductors and transformers sometimes constructed of thin layers?

• A. To simplify assembly during manufacturing
• B. To increase the cutoff frequency by reducing capacitance
• C. To save cost by reducing the amount of magnetic material
• D. To reduce power loss from eddy currents in the core

E5B01

42. What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage or to discharge to 36.8% of its initial voltage?

• A. An exponential rate of one
• B. A time factor of one
• C. One exponential period
• D. One time constant

E6B06

43. Which of the following is a common use of a Schottky diode?

• A. In power supplies as a constant voltage reference
• B. As a variable capacitance in an automatic frequency control circuit
• C. As a VHF/UHF mixer or detector
• D. In oscillator circuits as the negative resistance element

E7H06

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

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

E9D06

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

E1B07

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

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

E9A04

47. Which of the following factors affect the feed point impedance of an antenna?

• A. Transmission line length
• B. The input power level
• C. The settings of an antenna tuner at the transmitter
• D. Antenna height

E3B08

48. How does the maximum range of ground-wave propagation change when the signal frequency is increased?

• A. It stays the same
• B. It increases
• C. It peaks at roughly 8 MHz
• D. It decreases

E9C11

49. How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus soil?

• A. Additional lobes appear at higher elevation angles
• B. Radiation at low angles increases
• C. Separate elevation lobes will combine into a single lobe
• D. Radiation at low angles decreases

E8A09

50. How many different input levels can be encoded by an analog-to-digital converter with 8-bit resolution?

• A. 8 multiplied by the gain of the input amplifier
• B. 256 divided by the gain of the input amplifier
• C. 8
• D. 256