Practice Exam

T7C06

1. What does an SWR reading of 4:1 indicate?

• A. Impedance mismatch
• B. Loss of -4 dB
• C. Good impedance match
• D. Gain of +4 dB

T6C09

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

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

T6A03

3. What electrical parameter is controlled by a potentiometer?

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

T5D13

4. In which type of circuit is DC current the same through all components?

• A. Series
• B. Resonant
• C. Parallel
• D. Branch

T1D02

5. Under which of the following circumstances are one-way transmissions by an amateur station prohibited?

• A. Broadcasting
• B. International Morse Code Practice
• C. Telecommand or transmissions of telemetry
• D. In all circumstances

T0B10

6. Which of the following is true when installing grounding conductors used for lightning protection?

• A. Wires must be carefully routed with precise right-angle bends
• B. Common grounds must be avoided
• C. Use only non-insulated wire
• D. Sharp bends must be avoided

T8A03

7. Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?

• A. FM
• B. DRM
• C. SSB
• D. PM

T2B12

8. What is the purpose of the color code used on DMR repeater systems?

• A. Defines the minimum signal level required for access
• B. Must match the repeater color code for access
• C. Identifies the codec used
• D. Defines the frequency pair to use

T1B05

9. How may amateurs use the 219 to 220 MHz segment of 1.25 meter band?

• A. Fast-scan television only
• B. Emergency traffic only
• C. Fixed digital message forwarding systems only
• D. Spread spectrum only

T8B11

10. Who may receive telemetry from a space station?

• A. A licensed radio amateur who has been certified by the protocol developer
• B. A licensed radio amateur who has registered for an access code from AMSAT
• C. A licensed radio amateur with a transmitter equipped for interrogating the satellite
• D. Anyone

T5C07

11. What is the abbreviation for megahertz?

• A. MHz
• B. mh
• C. MH
• D. Mhz

T9B05

12. What happens as the frequency of a signal in coaxial cable is increased?

• A. The loss decreases
• B. The characteristic impedance decreases
• C. The loss increases
• D. The characteristic impedance increases

T5A12

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

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

T0C05

14. Why do exposure limits vary with frequency?

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

T8C03

15. What operating activity involves contacting as many stations as possible during a specified period?

• A. Public service events
• B. Contesting
• C. Simulated emergency exercises
• D. Net operations

T5B04

16. Which is equal to one microvolt?

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

T7A05

17. What is the name of a circuit that generates a signal at a specific frequency?

• A. Oscillator
• B. Reactance modulator
• C. Phase modulator
• D. Low-pass filter

T4B10

18. Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?

• A. 2400 Hz
• B. 500 Hz
• C. 5000 Hz
• D. 1000 Hz

T1F08

19. What is the definition of third party communications?

• A. Temporary authorization for an unlicensed person to transmit on the amateur bands for technical experiments
• B. A message from a control operator to another amateur station control operator on behalf of another person
• C. Amateur radio communications where three stations are in communications with one another
• D. Operation when the transmitting equipment is licensed to a person other than the control operator

T1C05

20. Which of the following is a valid Technician class call sign format?

• A. W1XX
• B. All these choices are correct
• C. KA1X
• D. KF1XXX

T9A05

21. Which of the following increases the resonant frequency of a dipole antenna?

• A. Lengthening it
• B. Inserting coils in series with radiating wires
• C. Shortening it
• D. Adding capacitive loading to the ends of the radiating wires

T3C07

22. What band is best suited for communicating via meteor scatter?

• A. 6 meters
• B. 2 meters
• C. 70 centimeters
• D. 33 centimeters

T8D02

23. What is a "talkgroup" on a DMR repeater?

• A. A net that meets at a specified time
• B. A protocol that increases the signal-to-noise ratio when multiple repeaters are linked together
• C. A way for groups of users to share a channel at different times without hearing other users on the channel
• D. A group of operators sharing common interests

T1E11

24. Who does the FCC presume to be the control operator of an amateur station, unless documentation to the contrary is in the station records?

• A. The person operating the station equipment
• B. The station licensee
• C. The station custodian
• D. The third party participant

T7D04

25. Which instrument is used to measure electric current?

• A. A voltmeter
• B. An ammeter
• C. An electrometer
• D. An ohmmeter

T6B05

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

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

T2C02

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

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

T3A09

28. Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized?

• A. Either vertically or horizontally polarized antennas may be used for transmission or reception
• B. Digital modes are unusable
• C. FM voice is unusable
• D. Both the transmitting and receiving antennas must be of the same polarization

T3B07

29. In addition to frequency, which of the following is used to identify amateur radio bands?

• A. Channel numbers
• B. The approximate wavelength in meters
• C. All these choices are correct
• D. Traditional letter/number designators

T7B04

30. Which of the following could you use to cure distorted audio caused by RF current on the shield of a microphone cable?

• A. Ferrite choke
• B. Band-pass filter
• C. Low-pass filter
• D. Preamplifier

T2A05

31. How should you respond to a station calling CQ?

• A. Transmit your call sign followed by the other station's call sign
• B. Transmit "CQ" followed by the other station's call sign
• C. Transmit a signal report followed by your call sign
• D. Transmit the other station's call sign followed by your call sign

T0A11

32. What hazard exists in a power supply immediately after turning it off?

• A. Voltage transients from kickback diodes
• B. Charge stored in filter capacitors
• C. Circulating currents in the dc filter
• D. Leakage flux in the power transformer

T1A01

33. Which of the following is part of the Basis and Purpose of the Amateur Radio Service?

• A. All these choices are correct
• B. Providing communications for international non-profit organizations
• C. Providing personal radio communications for as many citizens as possible
• D. Advancing skills in the technical and communication phases of the radio art

T4A06

34. What signals are used in a computer-radio interface for digital mode operation?

• A. Receive audio, transmit audio, and transmitter keying
• B. NMEA GPS location and DC power
• C. Receive and transmit mode, status, and location
• D. Antenna and RF power

T6D10

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

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