Practice Exam

T5D08

1. What is the current through a 100-ohm resistor connected across 200 volts?

• A. 100 amperes
• B. 0.5 amperes
• C. 20,000 amperes
• D. 2 amperes

T7C09

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

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

T0A12

3. Which of the following precautions should be taken when measuring high voltages with a voltmeter?

• A. Ensure that the voltmeter has very low impedance
• B. Ensure that the voltmeter and leads are rated for use at the voltages to be measured
• C. Ensure that the circuit is grounded through the voltmeter
• D. Ensure that the voltmeter is set to the correct frequency

T9B09

4. What can cause erratic changes in SWR?

• A. Loose connection in the antenna or feed line
• B. Local thunderstorm
• C. Over-modulation
• D. Overload from a strong local station

T5B03

5. Which is equal to one kilovolt?

• A. One thousand volts
• B. One million volts
• C. One one-thousandth of a volt
• D. One hundred volts

T7D09

6. What is the characteristic appearance of a cold tin-lead solder joint?

• A. Excessive solder
• B. A bright or shiny surface
• C. A rough or lumpy surface
• D. Dark black spots

T8A08

7. What is the approximate bandwidth of a typical single sideband (SSB) voice signal?

• A. 1 kHz
• B. 6 kHz
• C. 15 kHz
• D. 3 kHz

T0B07

8. Which of the following is an important safety rule to remember when using a crank-up tower?

• A. All these choices are correct
• B. This type of tower must never be painted
• C. This type of tower must not be climbed unless it is retracted, or mechanical safety locking devices have been installed
• D. This type of tower must never be grounded

T1D07

9. What types of amateur stations can automatically retransmit the signals of other amateur stations?

• A. Auxiliary, beacon, or Earth stations
• B. Beacon, repeater, or space stations
• C. Earth, repeater, or space stations
• D. Repeater, auxiliary, or space stations

T9A12

10. What is an advantage of a 5/8 wavelength whip antenna for VHF or UHF mobile service?

• A. It radiates at a very high angle
• B. It has more gain than a 1/4-wavelength antenna
• C. It eliminates distortion caused by reflected signals
• D. It has 10 times the power gain of a 1/4 wavelength whip

T1B09

11. Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?

• A. To allow for calibration error in the transmitter frequency display
• B. All these choices are correct
• C. So that modulation sidebands do not extend beyond the band edge
• D. To allow for transmitter frequency drift

T5A12

12. What describes the number of times per second that an alternating current makes a complete cycle?

• A. Pulse rate
• B. Frequency
• C. Speed
• D. Wavelength

T1A08

13. Which of the following entities recommends transmit/receive channels and other parameters for auxiliary and repeater stations?

• A. Frequency Spectrum Manager appointed by the FCC
• B. FCC Regional Field Office
• C. International Telecommunication Union
• D. Volunteer Frequency Coordinator recognized by local amateurs

T6D10

14. What is the function of component 2 in figure T-1?

• A. Control the flow of current
• B. Give off light when current flows through it
• C. Convert electrical energy into radio waves
• D. Supply electrical energy

T7B10

15. What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?

• A. Your transmitter is slightly off frequency
• B. You are in a bad location
• C. Your batteries are running low
• D. All these choices are correct

T1C08

16. What is the normal term for an FCC-issued amateur radio license?

• A. Life
• B. Five years
• C. Ten years
• D. Eight years

T8C08

17. What is the Internet Radio Linking Project (IRLP)?

• A. A technique to connect amateur radio systems, such as repeaters, via the internet using Voice Over Internet Protocol (VoIP)
• B. A technique for measuring signal strength of an amateur transmitter via the internet
• C. A system for providing access to websites via amateur radio
• D. A system for informing amateurs in real time of the frequency of active DX stations

T5C02

18. What is the unit of capacitance?

• A. The volt
• B. The ohm
• C. The henry
• D. The farad

T4B09

19. How is a specific group of stations selected on a digital voice transceiver?

• A. By activating automatic identification
• B. By enabling the group's CTCSS tone
• C. By entering the group's identification code
• D. By retrieving the frequencies from transceiver memory

T6A04

20. What electrical component stores energy in an electric field?

• A. Inductor
• B. Diode
• C. Varistor
• D. Capacitor

T1E03

21. Who must designate the station control operator?

• A. Any licensed operator
• B. The frequency coordinator
• C. The FCC
• D. The station licensee

T8D10

22. Which of the following operating activities is supported by digital mode software in the WSJT-X software suite?

• A. Earth-Moon-Earth
• B. Weak signal propagation beacons
• C. All these choices are correct
• D. Meteor scatter

T8B01

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

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

T2A12

24. What should you do before calling CQ?

• A. Ask if the frequency is in use
• B. Listen first to be sure that no one else is using the frequency
• C. Make sure you are authorized to use that frequency
• D. All these choices are correct

T0C01

25. What type of radiation are radio signals?

• A. Non-ionizing radiation
• B. Ionizing radiation
• C. Alpha radiation
• D. Gamma radiation

T1F01

26. When must the station and its records be available for FCC inspection?

• A. At any time ten days after notification by the FCC of such an inspection
• B. Only when presented with a valid warrant by an FCC official or government agent
• C. At any time upon request by an FCC representative
• D. At any time after written notification by the FCC of such inspection

T3A01

27. Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet?

• A. Multipath propagation cancels or reinforces signals
• B. All these choices are correct
• C. The signal path encounters different concentrations of water vapor
• D. VHF ionospheric propagation is very sensitive to path length

T2C02

28. Which of the following are typical duties of a Net Control Station?

• A. Call the net to order and direct communications between stations checking in
• B. All these choices are correct
• C. Choose the regular net meeting time and frequency
• D. Ensure that all stations checking into the net are properly licensed for operation on the net frequency

T6B02

29. What electronic component allows current to flow in only one direction?

• A. Resistor
• B. Fuse
• C. Diode
• D. Driven element

T3C02

30. What is a characteristic of HF communication compared with communications on VHF and higher frequencies?

• A. HF accommodates wider bandwidth signals
• B. There is less atmospheric interference (static) on HF
• C. Long-distance ionospheric propagation is far more common on HF
• D. HF antennas are generally smaller

T3B01

31. What is the relationship between the electric and magnetic fields of an electromagnetic wave?

• A. They are at right angles
• B. They revolve in opposite directions
• C. They travel at different speeds
• D. They are in parallel

T4A02

32. Which of the following should be considered when selecting an accessory SWR meter?

• A. All these choices are correct
• B. The distance that the meter will be located from the antenna
• C. The frequency and power level at which the measurements will be made
• D. The types of modulation being used at the station

T6C09

33. What is component 4 in figure T-2?

• A. Double-pole switch
• B. Transformer
• C. Potentiometer
• D. Variable inductor

T2B13

34. What is the purpose of a squelch function?

• A. Reduce a CW transmitter's key clicks
• B. Reduce interference from impulse noise
• C. Mute the receiver audio when a signal is not present
• D. Eliminate parasitic oscillations in an RF amplifier

T7A07

35. What is the function of a transceiver's PTT input?

• A. Switches transceiver from receive to transmit when grounded
• B. Provides a transmit tuning tone when grounded
• C. Input for a key used to send CW
• D. Input for a preamplifier tuning tone