Practice Exam

T6A03

1. What electrical parameter is controlled by a potentiometer?

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

T8D02

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

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

T9B09

3. What can cause erratic changes in SWR?

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

T6D09

4. What is the name of a device that combines several semiconductors and other components into one package?

• A. Integrated circuit
• B. Multi-pole relay
• C. Transducer
• D. Transformer

T5A02

5. Electrical power is measured in which of the following units?

• A. Watts
• B. Amperes
• C. Watt-hours
• D. Volts

T2C01

6. When do FCC rules NOT apply to the operation of an amateur station?

• A. When operating under special FEMA rules
• B. FCC rules always apply
• C. When operating under special ARES rules
• D. When operating a RACES station

T5B04

7. Which is equal to one microvolt?

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

T7C05

8. Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level?

• A. To lower the SWR on the transmission line
• B. Because power supplies cannot supply enough current at high SWR
• C. To comply with FCC rules on spectral purity
• D. To protect the output amplifier transistors

T1D06

9. What, if any, are the restrictions concerning transmission of language that may be considered indecent or obscene?

• A. Any such language is prohibited
• B. The FCC maintains a list of words that are not permitted to be used on amateur frequencies
• C. The ITU maintains a list of words that are not permitted to be used on amateur frequencies
• D. There is no such prohibition

T5D11

10. What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?

• A. 10 volts
• B. 1 volt
• C. 9 volts
• D. 11 volts

T8A02

11. What type of modulation is commonly used for VHF packet radio transmissions?

• A. FM or PM
• B. SSB
• C. PSK
• D. AM

T3A03

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

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

T1A08

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

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

T3C01

14. Why are simplex UHF signals rarely heard beyond their radio horizon?

• A. UHF signals are usually not propagated by the ionosphere
• B. They are too weak to go very far
• C. FCC regulations prohibit them from going more than 50 miles
• D. UHF signals are absorbed by the ionospheric D region

T0B03

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

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

T7D06

16. Which of the following can damage a multimeter?

• A. Attempting to measure resistance using the voltage setting
• B. Failing to connect one of the probes to ground
• C. Not allowing it to warm up properly
• D. Attempting to measure voltage when using the resistance setting

T1B08

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

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

T3B11

18. What is the approximate velocity of a radio wave in free space?

• A. 300,000,000 meters per second
• B. 150,000 meters per second
• C. 150,000 miles per hour
• D. 300,000,000 miles per hour

T7A11

19. Where is an RF preamplifier installed?

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

T2A11

20. What term describes an amateur station that is transmitting and receiving on the same frequency?

• A. Diplex
• B. Full duplex
• C. Multiplex
• D. Simplex

T1F08

21. What is the definition of third party communications?

• A. A message from a control operator to another amateur station control operator on behalf of another person
• B. Temporary authorization for an unlicensed person to transmit on the amateur bands for technical experiments
• 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

T1C09

22. What is the grace period for renewal if an amateur license expires?

• A. Two years
• B. Five years
• C. Ten years
• D. Three years

T8C11

23. What is an amateur radio station that connects other amateur stations to the internet?

• A. A gateway
• B. A beacon
• C. A digipeater
• D. A repeater

T1E07

24. When the control operator is not the station licensee, who is responsible for the proper operation of the station?

• A. Only the station licensee
• B. Only the control operator
• C. The control operator and the station licensee
• D. All licensed amateurs who are present at the operation

T0C07

25. What hazard is created by touching an antenna during a transmission?

• A. Electrocution
• B. All these choices are correct
• C. RF burn to skin
• D. Radiation poisoning

T7B02

26. What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?

• A. The receiver is unable to reject strong signals outside the AM or FM band
• B. The deviation of an FM transmitter is set too low
• C. The microphone gain of the transmitter is turned up too high
• D. The audio amplifier of the transmitter is overloaded

T9A09

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

• A. 6
• B. 112
• C. 50
• D. 236

T0A05

28. Why should a 5-ampere fuse never be replaced with a 20-ampere fuse?

• A. Excessive current could cause a fire
• B. The larger fuse would be likely to blow because it is rated for higher current
• C. The power supply ripple would greatly increase
• D. All these choices are correct

T6C09

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

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

T5C08

30. What is the formula used to calculate electrical power (P) in a DC circuit?

• A. P = E + I
• B. P = E * I
• C. P = E - I
• D. P = E / I

T4A07

31. Which of the following connections is made between a computer and a transceiver to use computer software when operating digital modes?

• A. Computer "line out" to transceiver speaker connector
• B. Computer "line in" to transceiver speaker connector
• C. Computer "line out" to transceiver push-to-talk
• D. Computer "line in" to transceiver push-to-talk

T6B03

32. Which of these components can be used as an electronic switch?

• A. Thermistor
• B. Transistor
• C. Potentiometer
• D. Varistor

T4B06

33. Which of the following controls could be used if the voice pitch of a single-sideband signal returning to your CQ call seems too high or low?

• A. The tone squelch
• B. The RIT or Clarifier
• C. The AGC or limiter
• D. The bandwidth selection

T2B06

34. What type of signaling uses pairs of audio tones?

• A. D-STAR
• B. DTMF
• C. CTCSS
• D. GPRS

T8B06

35. Which of the following are inputs to a satellite tracking program?

• A. All these choices are correct
• B. The Keplerian elements
• C. The last observed time of zero Doppler shift
• D. The satellite transmitted power