ham exam 3 General Pretest


1. Where is an S meter found?

  • A. In a transmitter
  • B. In a receiver
  • C. In an SWR bridge
  • D. In a conductance bridge


2. Which statement about a three-element; single-band Yagi antenna is true?

  • A. The reflector is normally the longest parasitic element
  • B. All of the elements must be the same length
  • C. The reflector is normally the shortest parasitic element
  • D. The director is normally the longest parasitic element


3. What language must you use when identifying your station if you are using a language other than English in making a contact using phone emission?

  • A. English
  • B. Any language of a country that is a member of the ITU
  • C. The language being used for the contact
  • D. Any language if the US has a third party agreement with that country


4. What happens to HF propagation when the Lowest Usable Frequency (LUF) exceeds the Maximum Usable Frequency (MUF)?

  • A. Double hop propagation along the path is more common
  • B. HF communications over the path are enhanced
  • C. No HF radio frequency will support ordinary skywave communications over the path
  • D. Propagation over the path on all HF frequencies is enhanced


5. Approximately how long does it take the increased ultraviolet and X-ray radiation from solar flares to affect radio-wave propagation on the Earth?

  • A. 20 to 40 hours
  • B. 1 to 2 hours
  • C. 8 minutes
  • D. 28 days


6. Which of the following is a limitation on transmitter power on the 14 MHz band?

  • A. Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
  • B. Power should be limited as necessary to avoid interference to another radio service on the frequency
  • C. Only the minimum power necessary to carry out the desired communications should be used
  • D. Effective radiated power cannot exceed 3000 watts


7. What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

  • A. Substantially lower
  • B. Substantially higher
  • C. Twice the transmission line impedance
  • D. About the same


8. What is a characteristic of HF scatter signals?

  • A. They have high intelligibility
  • B. They have very large swings in signal strength
  • C. They have a wavering sound
  • D. All of these choices are correct


9. How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?

  • A. In conformance with the rules of the IARU
  • B. All of these choices are correct
  • C. In conformance with good engineering and good amateur practice
  • D. In conformance with Amateur Radio custom


10. What precaution should be taken when installing a ground-mounted antenna?

  • A. It should not be installed higher than you can reach
  • B. It should not be installed in a wet area
  • C. It should be installed so no one can be exposed to RF radiation in excess of maximum permissible limits
  • D. It should limited to 10 feet in height


11. Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

  • A. It minimizes power consumption in the receiver
  • B. It improves impedance matching of the antenna
  • C. It is required by FCC rules
  • D. It results in the best signal to noise ratio


12. What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?

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


13. What is the capacitance of a 20 microfarad capacitor in series with a 50 microfarad capacitor?

  • A. 14.3 microfarads
  • B. .07 microfarads
  • C. 70 microfarads
  • D. 1000 microfarads


14. How many watts of electrical power are used by a 12-VDC light bulb that draws 0.2 amperes?

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


15. Which of the following can perform automatic notching of interfering carriers?

  • A. Balanced mixing
  • B. A Digital Signal Processor (DSP) filter
  • C. A noise limiter
  • D. Band-pass tuning


16. Which of the following describes the function of a two input AND gate?

  • A. Output is low only when both inputs are high
  • B. Output is low when either or both inputs are high
  • C. Output is high when either or both inputs are low
  • D. Output is high only when both inputs are high


17. Which of the following modes is most commonly used for voice communications on the 160, 75, and 40 meter bands?

  • A. Lower sideband
  • B. Vestigial sideband
  • C. Upper sideband
  • D. Double sideband


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

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


19. What unit is used to measure reactance?

  • A. Farad
  • B. Ohm
  • C. Siemens
  • D. Ampere


20. What skills learned during "hidden transmitter hunts" are of help to the Amateur Auxiliary?

  • A. Hunters have an opportunity to transmit on non-amateur frequencies
  • B. Identification of out of band operation
  • C. Identification of different call signs
  • D. Direction finding used to locate stations violating FCC Rules


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

  • A. 84 feet
  • B. 42 feet
  • C. 263 feet
  • D. 131 feet


22. Which of the following phone emissions uses the narrowest frequency bandwidth?

  • A. Phase modulation
  • B. Single sideband
  • C. Double sideband
  • D. Frequency modulation


23. What does the Q signal "QRQ" mean?

  • A. Quitting operation
  • B. Zero beat my signal
  • C. Slow down
  • D. Send faster


24. What is the reason for the occurrence of reflected power at the point where a feed line connects to an antenna?

  • A. A difference between feed-line impedance and antenna feed-point impedance
  • B. Using more transmitter power than the antenna can handle
  • C. Operating an antenna at its resonant frequency
  • D. Feeding the antenna with unbalanced feed line


25. What type of device is often used to enable matching the transmitter output to an impedance other than 50 ohms?

  • A. Balanced modulator
  • B. Q Multiplier
  • C. Antenna coupler
  • D. SWR Bridge


26. Which of the following is a characteristic of a liquid crystal display?

  • A. It has a wide viewing angle
  • B. It requires ambient or back lighting
  • C. It offers a wide dynamic range
  • D. All of these choices are correct


27. When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its Web site?

  • A. Whenever you operate using Technician frequency privileges
  • B. Whenever you operate on any amateur frequency
  • C. A special identifier is not required as long as your General Class license application has been filed with the FCC
  • D. Whenever you operate using General Class frequency privileges


28. What portion of the AC cycle is converted to DC by a half-wave rectifier?

  • A. 180 degrees
  • B. 90 degrees
  • C. 360 degrees
  • D. 270 degrees


29. Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

  • A. The voltage and current ratings of such systems are not compatible with amateur equipment
  • B. The conversion efficiency from mechanical energy to electrical energy is less than 2 percent
  • C. A large energy storage system is needed to supply power when the wind is not blowing
  • D. All of these choices are correct


30. What segment of the 20 meter band is most often used for data transmissions?

  • A. 14.000 - 14.050 MHz
  • B. 14.275 - 14.350 MHz
  • C. 14.070 - 14.100 MHz
  • D. 14.150 - 14.225 MHz


31. When is it acceptable to recharge a carbon-zinc primary cell?

  • A. As long as the voltage has not been allowed to drop below 1.0 volt
  • B. Never
  • C. When a constant current charger is used
  • D. When the cell is kept warm during the recharging period


32. Which of the following frequencies is within the General Class portion of the 20 meter phone band?

  • A. 14005 kHz
  • B. 14405 kHz
  • C. 14105 kHz
  • D. 14305 kHz


33. What is a common name for an inductor used to help smooth the DC output from the rectifier in a conventional power supply?

  • A. Filter choke
  • B. Back EMF choke
  • C. Charging inductor
  • D. Repulsion coil


34. When selecting a CW transmitting frequency, what minimum frequency separation should you allow in order to minimize interference to stations on adjacent frequencies?

  • A. 3 to 6 kHz
  • B. 1 to 3 kHz
  • C. 150 to 500 Hz
  • D. 5 to 50 Hz


35. Which of the following is an advantage of a log periodic antenna?

  • A. Harmonic suppression
  • B. Higher gain per element than a Yagi antenna
  • C. Wide bandwidth
  • D. Polarization diversity