Practice Exam

G2C01

1. Which of the following describes full break-in CW operation (QSK)?

• A. Automatic keyers, instead of hand keys, are used to send Morse code
• B. Transmitting stations can receive between code characters and elements
• C. Breaking stations send the Morse code prosign "BK"
• D. An operator must activate a manual send/receive switch before and after every transmission

G6B04

2. What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

• A. 4 GHz
• B. 50 MHz
• C. 500 MHz
• D. 40 GHz

G2B06

3. How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

• A. Send the letter "V" in Morse code several times and listen for a response, or say "test" several times and listen for a response
• B. Send "QSY" on CW or if using phone, announce "the frequency is in use," then give your call sign and listen for a response
• C. Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
• D. Listen for 2 minutes before calling CQ

G5B12

4. What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

• A. 346 volts
• B. 173 volts
• C. 692 volts
• D. 245 volts

G3A06

5. What is a geomagnetic storm?

• A. A sudden drop in the solar flux index
• B. A thunderstorm that affects radio propagation
• C. A temporary disturbance in Earth's geomagnetic field
• D. Ripples in the geomagnetic force

G8C04

6. Which of the following describes Baudot code?

• A. A 7-bit code with start, stop, and parity bits
• B. A code using SELCAL and LISTEN
• C. A code using error detection and correction
• D. A 5-bit code with additional start and stop bits

G2E10

7. Which of the following is a way to establish contact with a digital messaging system gateway station?

• A. Send QRL in Morse code
• B. Respond when the station broadcasts its SSID
• C. Send an email to the system control operator
• D. Transmit a connect message on the station's published frequency

G4E07

8. Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

• A. The fuel delivery system
• B. All these choices are correct
• C. The control computers
• D. The battery charging system

G8B01

9. Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

• A. Image frequency
• B. Local oscillator
• C. RF input
• D. Beat frequency oscillator

G3C07

10. What makes HF scatter signals often sound distorted?

• A. The E region is not present
• B. The ionospheric region involved is unstable
• C. Energy is scattered into the skip zone through several different paths
• D. Ground waves are absorbing much of the signal

G9A07

11. What must be done to prevent standing waves on a feed line connected to an antenna?

• A. The feed line must be an odd number of electrical quarter wavelengths long
• B. The antenna feed point impedance must be matched to the characteristic impedance of the feed line
• C. The antenna feed point must be at DC ground potential
• D. The feed line must be an even number of physical half wavelengths long

G0A01

12. What is one way that RF energy can affect human body tissue?

• A. It causes radiation poisoning
• B. It heats body tissue
• C. It causes the blood count to reach a dangerously low level
• D. It cools body tissue

G8A09

13. What type of modulation is used by FT8?

• A. Amplitude compressed AM
• B. 8-bit direct sequence spread spectrum
• C. 8-tone frequency shift keying
• D. Vestigial sideband

G7A08

14. Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

• A. Faster switching time makes higher output voltage possible
• B. Inherently more stable
• C. Fewer circuit components are required
• D. High-frequency operation allows the use of smaller components

G9C12

15. Which of the following is a characteristic of using a gamma match with a Yagi antenna?

• A. It is useful for matching multiband antennas
• B. It does not require any inductors or capacitors
• C. All these choices are correct
• D. It does not require the driven element to be insulated from the boom

G0B01

16. Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

• A. Only the ground wire
• B. All wires
• C. Only the hot wires
• D. Only the neutral wire

G4A12

17. Which of the following is a common use of the dual-VFO feature on a transceiver?

• A. To permit full duplex operation -- that is, transmitting and receiving at the same time
• B. To improve frequency accuracy by allowing variable frequency output (VFO) operation
• C. To allow transmitting on two frequencies at once
• D. To transmit on one frequency and listen on another

G4C04

18. What sound is heard from an audio device experiencing RF interference from a CW transmitter?

• A. On-and-off humming or clicking
• B. A CW signal at a nearly pure audio frequency
• C. A chirpy CW signal
• D. Severely distorted audio

G1C04

19. Which of the following is required by the FCC rules when operating in the 60-meter band?

• A. You must keep a record of the date, time, frequency, power level, and stations worked
• B. If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
• C. You must keep a record of the manufacturer of your equipment and the antenna used
• D. You must keep a record of all third-party traffic

G1D05

20. When operating a US station by remote control from outside the country, what license is required of the control operator?

• A. A US operator/primary station license
• B. Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
• C. Only an appropriate US operator/primary license and a special remote station permit from the FCC
• D. A license from the foreign country and a special remote station permit from the FCC

G2A12

21. What control is typically adjusted for proper ALC setting on a single sideband transceiver?

• A. Antenna inductance or capacitance
• B. Attenuator level
• C. Transmit audio or microphone gain
• D. RF clipping level

G9B11

22. What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

• A. 263 feet
• B. 132 feet
• C. 42 feet
• D. 84 feet

G4B01

23. What item of test equipment contains horizontal and vertical channel amplifiers?

• A. A signal generator
• B. An ohmmeter
• C. An ammeter
• D. An oscilloscope

G1B07

24. What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

• A. They are limited to those expressly listed in Part 97 of the FCC rules
• B. They may be used if they do not obscure the meaning of a message
• C. They are not permitted
• D. Only "Q" signals are permitted

G5C04

25. What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

• A. 300 ohms
• B. 75 ohms
• C. 150 ohms
• D. 67 ohms

G1A02

26. On which of the following bands is phone operation prohibited?

• A. 17 meters
• B. 160 meters
• C. 12 meters
• D. 30 meters

G3B07

27. What does LUF stand for?

• A. The Lowest Usable Frequency during a 24-hour period
• B. Lowest Usable Frequency for communications to any point outside a 100-mile radius
• C. The Lowest Usable Frequency for communications between two specific points
• D. Lowest Usable Frequency during the past 60 minutes

G7B09

28. What determines the frequency of an LC oscillator?

• A. The number of stages in the divider
• B. The time delay of the lag circuit
• C. The number of stages in the counter
• D. The inductance and capacitance in the tank circuit

G5A01

29. What happens when inductive and capacitive reactance are equal in a series LC circuit?

• A. Resonance causes impedance to be very low
• B. Impedance is equal to the arithmetic mean of the inductance and capacitance
• C. Resonance causes impedance to be very high
• D. Impedance is equal to the geometric mean of the inductance and capacitance

G6A06

30. Why should wire-wound resistors not be used in RF circuits?

• A. The resistor's tolerance value would not be adequate
• B. The resistor could overheat
• C. The resistor's internal capacitance would detune the circuit
• D. The resistor's inductance could make circuit performance unpredictable

G9D10

31. In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

• A. Electrically small loops are omnidirectional
• B. Broadside and in the plane of the loop
• C. In the plane of the loop
• D. Broadside to the loop

G4D11

32. How close to the upper edge of a band's phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

• A. At least 1 kHz below the edge of the segment
• B. At least 3 kHz above the edge of the band
• C. At least 3 kHz below the edge of the band
• D. At least 1 kHz above the edge of the segment

G1E04

33. Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

• A. When a station is transmitting spread spectrum emissions
• B. All these choices are correct
• C. When operating within one mile of an FCC Monitoring Station
• D. When using a band where the Amateur Service is secondary

G2D11

34. Why are signal reports typically exchanged at the beginning of an HF contact?

• A. To allow each station to calibrate their frequency display
• B. To be sure the contact will count for award programs
• C. To follow standard radiogram structure
• D. To allow each station to operate according to conditions

G7C06

35. Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

• A. The DSP filter is much more effective at VHF frequencies
• B. Fewer digital components are required
• C. A wide range of filter bandwidths and shapes can be created
• D. Mixing products are greatly reduced