Practice Exam

T7B03

1. Which of the following can cause radio frequency interference?

• A. Fundamental overload
• B. All these choices are correct
• C. Spurious emissions
• D. Harmonics

T9B11

2. Which of the following types of feed line has the lowest loss at VHF and UHF?

• A. 50-ohm flexible coax
• B. Air-insulated hardline
• C. 75-ohm flexible coax
• D. Multi-conductor unbalanced cable

T1A10

3. What is the Radio Amateur Civil Emergency Service (RACES)?

• A. A radio service using amateur frequencies for emergency management or civil defense communications
• B. An emergency service using amateur operators certified by a civil defense organization as being enrolled in that organization
• C. All these choices are correct
• D. A radio service using amateur stations for emergency management or civil defense communications

T5B08

4. Which is equal to 1,000,000 picofarads?

• A. 1 microfarad
• B. 1,000,000,000 microfarads
• C. 0.001 microfarads
• D. 1000 microfarads

T3B10

5. What frequency range is referred to as HF?

• A. 300 to 3000 kHz
• B. 30 to 300 MHz
• C. 300 to 3000 MHz
• D. 3 to 30 MHz

T0A06

6. What is a good way to guard against electrical shock at your station?

• A. Connect all AC powered station equipment to a common safety ground
• B. All these choices are correct
• C. Use three-wire cords and plugs for all AC powered equipment
• D. Install mechanical interlocks in high-voltage circuits

T8A01

7. Which of the following is a form of amplitude modulation?

• A. Spread spectrum
• B. Packet radio
• C. Single sideband
• D. Phase shift keying (PSK)

T1D03

8. When is it permissible to transmit messages encoded to obscure their meaning?

• A. Only when transmitting control commands to space stations or radio control craft
• B. Only during contests
• C. Only when transmitting certain approved digital codes
• D. Never

T8D07

9. Which of the following describes DMR?

• A. An automatic position tracking mode for FM mobiles communicating through repeaters
• B. An automatic computer logging technique for hands-off logging when communicating while operating a vehicle
• C. A digital technique for transmitting on two repeater inputs simultaneously for automatic error correction
• D. A technique for time-multiplexing two digital voice signals on a single 12.5 kHz repeater channel

T7A11

10. Where is an RF preamplifier installed?

• A. At the output of the transmitter power amplifier
• B. Between the transmitter and the antenna tuner
• C. Between the antenna and receiver
• D. At the output of the receiver audio amplifier

T8C01

11. Which of the following methods is used to locate sources of noise interference or jamming?

• A. Radio direction finding
• B. Doppler radar
• C. Phase locking
• D. Echolocation

T8B01

12. What telemetry information is typically transmitted by satellite beacons?

• A. The signal strength of received signals
• B. Time of day accurate to plus or minus 1/10 second
• C. All these choices are correct
• D. Health and status of the satellite

T7D11

13. Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter?

• A. Ensure that the applied voltages are correct
• B. Ensure that the circuit is not powered
• C. Ensure that the circuit is operating at the correct frequency
• D. Ensure that the circuit is grounded

T1F11

14. Which of the following is a requirement for the issuance of a club station license grant?

• A. The club must have at least four members
• B. The club must be registered with the American Radio Relay League
• C. The trustee must have an Amateur Extra Class operator license grant
• D. All these choices are correct

T6A03

15. What electrical parameter is controlled by a potentiometer?

• A. Capacitance
• B. Field strength
• C. Inductance
• D. Resistance

T3C05

16. Which of the following effects may allow radio signals to travel beyond obstructions between the transmitting and receiving stations?

• A. Faraday rotation
• B. Doppler shift
• C. Knife-edge diffraction
• D. Quantum tunneling

T1C04

17. What may happen if the FCC is unable to reach you by email?

• A. Revocation of access to the license record in the FCC system
• B. Nothing; there is no such requirement
• C. Fine and suspension of operator license
• D. Revocation of the station license or suspension of the operator license

T5D07

18. What is the current in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?

• A. 1.5 amperes
• B. 200 amperes
• C. 9600 amperes
• D. 0.667 amperes

T7C09

19. Which of the following causes failure of coaxial cables?

• A. Moisture contamination
• B. Rapid fluctuation in transmitter output power
• C. Solder flux contamination
• D. Operation at 100% duty cycle for an extended period

T0C05

20. Why do exposure limits vary with frequency?

• A. Lower frequency RF fields have more energy than higher frequency fields
• B. Lower frequency RF fields do not penetrate the human body
• C. Higher frequency RF fields are transient in nature
• D. The human body absorbs more RF energy at some frequencies than at others

T1B08

21. How are US amateurs restricted in segments of bands where the Amateur Radio Service is secondary?

• A. Digital transmissions are not permitted in those segments
• B. U.S. amateurs may find non-amateur stations in those segments, and must avoid interfering with them
• C. U.S. amateurs must give foreign amateur stations priority in those segments
• D. International communications are not permitted in those segments

T9A09

22. What is the approximate length, in inches, of a half-wavelength 6 meter dipole antenna?

• A. 236
• B. 112
• C. 50
• D. 6

T2C06

23. What is the Amateur Radio Emergency Service (ARES)?

• A. A group of licensed amateurs who have voluntarily registered their qualifications and equipment for communications duty in the public service
• B. A training program that provides licensing courses for those interested in obtaining an amateur license to use during emergencies
• C. A group of licensed amateurs who are members of the military and who voluntarily agreed to provide message handling services in the case of an emergency
• D. A training program that certifies amateur operators for membership in the Radio Amateur Civil Emergency Service

T6C01

24. What is the name of an electrical wiring diagram that uses standard component symbols?

• A. Connector pinout
• B. Schematic
• C. Bill of materials
• D. Flow chart

T4A05

25. Where should an RF power meter be installed?

• A. At the power supply output
• B. In the power supply cable, as close as possible to the radio
• C. In parallel with the push-to-talk line and the antenna
• D. In the feed line, between the transmitter and antenna

T4B08

26. What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?

• A. Increases the amount of offset between receive and transmit frequencies
• B. Permits noise or interference reduction by selecting a bandwidth matching the mode
• C. Increases the number of frequencies that can be stored in memory
• D. Permits monitoring several modes at once by selecting a separate filter for each mode

T1E02

27. Who may be the control operator of a station communicating through an amateur satellite or space station?

• A. Any amateur allowed to transmit on the satellite uplink frequency
• B. Only an Amateur Extra Class operator who is also an AMSAT member
• C. A General class or higher licensee with a satellite operator certification
• D. Only an Amateur Extra Class operator

T3A03

28. What antenna polarization is normally used for long-distance CW and SSB contacts on the VHF and UHF bands?

• A. Vertical
• B. Horizontal
• C. Right-hand circular
• D. Left-hand circular

T6B05

29. What type of transistor has a gate, drain, and source?

• A. Varistor
• B. Tesla-effect
• C. Bipolar junction
• D. Field-effect

T2A08

30. What is the meaning of the procedural signal "CQ"?

• A. Call on the quarter hour
• B. Calling any station
• C. Only the called station should transmit
• D. Test transmission, no reply expected

T6D04

31. Which of the following displays an electrical quantity as a numeric value?

• A. Relay
• B. Potentiometer
• C. Transistor
• D. Meter

T2B08

32. Which of the following applies when two stations transmitting on the same frequency interfere with each other?

• A. The stations should negotiate continued use of the frequency
• B. Use subaudible tones so both stations can share the frequency
• C. Interference is inevitable, so no action is required
• D. Both stations should choose another frequency to avoid conflict

T0B03

33. Under what circumstances is it safe to climb a tower without a helper or observer?

• A. When the work being done is not more than 20 feet above the ground
• B. When no mechanical work is being performed
• C. Never
• D. When no electrical work is being performed

T5C12

34. What is impedance?

• A. The opposition to AC current flow
• B. The Q or Quality Factor of a component
• C. The power handling capability of a component
• D. The inverse of resistance

T5A04

35. What are the units of electrical resistance?

• A. Mhos
• B. Ohms
• C. Siemens
• D. Coulombs