Practice Exam

G4C07

1. Why should soldered joints not be used in lightning protection ground connections?

• A. A soldered joint will likely be destroyed by the heat of a lightning strike
• B. All these choices are correct
• C. Solder has too high a dielectric constant to provide adequate lightning protection
• D. Solder flux will prevent a low conductivity connection

G4B12

2. What effect can strong signals from nearby transmitters have on an antenna analyzer?

• A. Desensitization which can cause intermodulation products which interfere with impedance readings
• B. All these choices are correct
• C. Generation of harmonics which interfere with frequency readings
• D. Received power that interferes with SWR readings

G2C02

3. What should you do if a CW station sends "QRS?"

• A. Increase your power
• B. Repeat everything twice
• C. Change frequency
• D. Send slower

G1B07

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

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

G3C05

5. Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

• A. The F region absorbs signals at these frequencies during daylight hours
• B. The D region absorbs signals at these frequencies during daylight hours
• C. The E region is unstable during daylight hours
• D. The F region is unstable during daylight hours

G7A03

6. Which type of rectifier circuit uses two diodes and a center-tapped transformer?

• A. Half-wave
• B. Synchronous
• C. Full-wave
• D. Full-wave bridge

G4D04

7. What does an S meter measure?

• A. Received signal strength
• B. Impedance
• C. Carrier suppression
• D. Transmitter power output

G2A12

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

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

G0A08

9. Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

• A. Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels
• B. All these choices are correct
• C. Post a copy of FCC Part 97.13 in the station
• D. Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas

G8A05

10. What type of modulation varies the instantaneous power level of the RF signal?

• A. Amplitude modulation
• B. Power modulation
• C. Phase modulation
• D. Frequency modulation

G2D06

11. How is a directional antenna pointed when making a "long-path" contact with another station?

• A. Toward the rising sun
• B. 180 degrees from the station's short-path heading
• C. Toward the north
• D. Along the gray line

G1C07

12. What must be done before using a new digital protocol on the air?

• A. Type-certify equipment to FCC standards
• B. Publicly document the technical characteristics of the protocol
• C. Obtain an experimental license from the FCC
• D. Submit a rule-making proposal to the FCC describing the codes and methods of the technique

G1A05

13. On which of the following frequencies are General class licensees prohibited from operating as control operator?

• A. 21.275 MHz to 21.300 MHz
• B. 28.000 MHz to 28.025 MHz
• C. 7.125 MHz to 7.175 MHz
• D. All of the above

G5C02

14. What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

• A. The input voltage is multiplied by 4
• B. Additional resistance must be added in series with the primary to prevent overload
• C. The input voltage is divided by 4
• D. Additional resistance must be added in parallel with the secondary to prevent overload

G5B04

15. How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

• A. 24 watts
• B. 60 watts
• C. 2.4 watts
• D. 6 watts

G7B09

16. What determines the frequency of an LC oscillator?

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

G0B02

17. According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

• A. AWG number 20
• B. AWG number 12
• C. AWG number 16
• D. AWG number 8

G1D07

18. Volunteer Examiners are accredited by what organization?

• A. A Volunteer Examiner Coordinator
• B. The Universal Licensing System
• C. The Wireless Telecommunications Bureau
• D. The Federal Communications Commission

G6A11

19. What happens when an inductor is operated above its self-resonant frequency?

• A. It becomes capacitive
• B. Its reactance increases
• C. Harmonics are generated
• D. Catastrophic failure is likely

G4A11

20. Why should the ALC system be inactive when transmitting AFSK data signals?

• A. All these choices are correct
• B. When using digital modes, too much ALC activity can cause the transmitter to overheat
• C. ALC will invert the modulation of the AFSK mode
• D. The ALC action distorts the signal

G9A02

21. What is the relationship between high standing wave ratio (SWR) and transmission line loss?

• A. High SWR reduces the relative effect of transmission line loss
• B. High SWR makes it difficult to measure transmission line loss
• C. High SWR increases loss in a lossy transmission line
• D. There is no relationship between transmission line loss and SWR

G6B10

22. How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

• A. Ferrites expel magnetic fields
• B. By creating an impedance in the current's path
• C. It converts common-mode current to differential mode current
• D. By creating an out-of-phase current to cancel the common-mode current

G2B08

23. What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

• A. Only contacts with other stations within the 48 contiguous states
• B. Only SSTV contacts
• C. Only contacts with stations not within the 48 contiguous states
• D. Only digital contacts

G2E14

24. What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

• A. You may be listening on the wrong sideband
• B. The mark and space frequencies may be reversed
• C. You may have selected the wrong baud rate
• D. All these choices are correct

G4E07

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

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

G3B10

26. What is the approximate maximum distance along the Earth's surface normally covered in one hop using the E region?

• A. 1,200 miles
• B. 2,500 miles
• C. 12,000 miles
• D. 180 miles

G8C06

27. What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

• A. Encoding reverts to the default character set
• B. Packets will be routed incorrectly
• C. The checksum overflows
• D. The connection is dropped

G9C08

28. What is meant by the "main lobe" of a directive antenna?

• A. The magnitude of the maximum vertical angle of radiation
• B. The maximum voltage standing wave point on a radiating element
• C. The direction of maximum radiated field strength from the antenna
• D. The point of maximum current in a radiating antenna element

G1E10

29. Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

• A. These frequencies are set aside for emergency operations
• B. A system of propagation beacon stations operates on those frequencies
• C. These frequencies are set aside for bulletins from the FCC
• D. A system of automatic digital stations operates on those frequencies

G7C07

30. What term specifies a filter's attenuation inside its passband?

• A. Ultimate rejection
• B. Return loss
• C. Q
• D. Insertion loss

G5A12

31. What occurs in an LC circuit at resonance?

• A. Inductive reactance and capacitive reactance cancel
• B. Current and voltage are equal
• C. Resistance is cancelled
• D. The circuit radiates all its energy in the form of radio waves

G9D04

32. What is the primary function of antenna traps?

• A. To enable multiband operation
• B. To provide balanced feed point impedance
• C. To notch spurious frequencies
• D. To prevent out-of-band operation

G9B04

33. What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

• A. It is a figure-eight off both ends of the antenna
• B. It is a figure-eight at right angles to the antenna
• C. It has a pair of lobes on one side of the antenna and a single lobe on the other side
• D. It is a circle (equal radiation in all directions)

G3A12

34. What does the K-index measure?

• A. The short-term stability of the Sun's magnetic field
• B. The relative position of sunspots on the surface of the Sun
• C. The short-term stability of Earth's geomagnetic field
• D. The solar radio flux at Boulder, Colorado

G8B06

35. What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

• A. 5 kHz
• B. 8 kHz
• C. 3 kHz
• D. 16 kHz