Practice Exam

T5D07

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

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

T5C07

2. What is the abbreviation for megahertz?

• A. MH
• B. Mhz
• C. mh
• D. MHz

T7D10

3. What reading indicates that an ohmmeter is connected across a large, discharged capacitor?

• A. Steady full-scale reading
• B. Alternating between open and short circuit
• C. Decreasing resistance with time
• D. Increasing resistance with time

T2B03

4. Which of the following describes a linked repeater network?

• A. A single repeater with more than one receiver
• B. A system of repeaters linked by APRS
• C. Multiple repeaters with the same control operator
• D. A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network

T0B03

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

T7A01

6. Which term describes the ability of a receiver to detect the presence of a signal?

• A. Total Harmonic Distortion
• B. Linearity
• C. Sensitivity
• D. Selectivity

T1F05

7. What method of call sign identification is required for a station transmitting phone signals?

• A. Send the call sign followed by the indicator RPT
• B. Send the call sign using only a phone emission
• C. Send the call sign using a CW or phone emission
• D. Send the call sign followed by the indicator R

T6A09

8. What electrical component is used to protect other circuit components from current overloads?

• A. Fuse
• B. Thyratron
• C. All these choices are correct
• D. Varactor

T1C02

9. Who may select a desired call sign under the vanity call sign rules?

• A. Any licensed amateur
• B. Only a licensed amateur who has been licensed continuously for more than 10 years
• C. Only a licensed amateur with an Amateur Extra Class license
• D. Only a licensed amateur with a General or Amateur Extra Class license

T1D11

10. When may an amateur station transmit without identifying on the air?

• A. When the transmissions are of a brief nature to make station adjustments
• B. When the transmitted power level is below 1 watt
• C. When the transmissions are unmodulated
• D. When transmitting signals to control model craft

T0A06

11. 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

T9B04

12. What is the major function of an antenna tuner (antenna coupler)?

• A. It allows an antenna to be used on both transmit and receive
• B. It helps a receiver automatically tune in weak stations
• C. It automatically selects the proper antenna for the frequency band being used
• D. It matches the antenna system impedance to the transceiver's output impedance

T2C10

13. What information is contained in the preamble of a formal traffic message?

• A. The email address of the originating station
• B. The address of the intended recipient
• C. The telephone number of the addressee
• D. Information needed to track the message

T8C05

14. What is a grid locator?

• A. An instrument for neutralizing a final amplifier
• B. An instrument for radio direction finding
• C. A letter-number designator assigned to an azimuth and elevation
• D. A letter-number designator assigned to a geographic location

T5A09

15. Which of the following describes alternating current?

• A. Current that alternates between positive and negative directions
• B. All these answers are correct
• C. Current that alternates between a positive direction and zero
• D. Current that alternates between a negative direction and zero

T4B07

16. What does a DMR "code plug" contain?

• A. The codec for digitizing audio
• B. Access information for repeaters and talkgroups
• C. The DMR software version
• D. Your call sign in CW for automatic identification

T6D01

17. Which of the following devices or circuits changes an alternating current into a varying direct current signal?

• A. Transformer
• B. Amplifier
• C. Rectifier
• D. Reflector

T5B11

18. Which decibel value represents a power increase from 20 watts to 200 watts?

• A. 10 dB
• B. 18 dB
• C. 12 dB
• D. 28 dB

T9A09

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

• A. 236
• B. 6
• C. 112
• D. 50

T3C02

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

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

T8A07

21. What is a characteristic of single sideband (SSB) compared to FM?

• A. SSB signals have narrower bandwidth
• B. All these choices are correct
• C. SSB signals are less susceptible to interference
• D. SSB signals are easier to tune in correctly

T6B05

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

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

T1E04

23. What determines the transmitting frequency privileges of an amateur station?

• A. The highest class of operator license held by anyone on the premises
• B. The frequencies printed on the license grant
• C. The class of operator license held by the control operator
• D. The frequency authorized by the frequency coordinator

T3B06

24. What is the formula for converting frequency to approximate wavelength in meters?

• A. Wavelength in meters equals frequency in hertz multiplied by 300
• B. Wavelength in meters equals frequency in hertz divided by 300
• C. Wavelength in meters equals frequency in megahertz divided by 300
• D. Wavelength in meters equals 300 divided by frequency in megahertz

T8B10

25. What is a LEO satellite?

• A. A satellite in low energy operation mode
• B. A satellite in low earth orbit
• C. A sun synchronous satellite
• D. A highly elliptical orbit satellite

T8D09

26. What is CW?

• A. Another name for a Morse code transmission
• B. A digital mode used primarily on 2 meter FM
• C. A technique for coil winding
• D. A type of electromagnetic propagation

T0C09

27. How can you make sure your station stays in compliance with RF safety regulations?

• A. All these choices are correct
• B. By re-evaluating the station whenever an item in the transmitter or antenna system is changed
• C. By informing the FCC of any changes made in your station
• D. By making sure your antennas have low SWR

T7C06

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

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

T1A07

29. What is the FCC Part 97 definition of a space station?

• A. Any satellite orbiting Earth
• B. An amateur station using amateur radio satellites for relay of signals
• C. A manned satellite orbiting Earth
• D. An amateur station located more than 50 km above Earth's surface

T2A06

30. Which of the following is required when making on-the-air test transmissions?

• A. Notify the FCC of the transmissions
• B. All these choices are correct
• C. Conduct tests only between 10 p.m. and 6 a.m. local time
• D. Identify the transmitting station

T3A04

31. What happens when antennas at opposite ends of a VHF or UHF line of sight radio link are not using the same polarization?

• A. The modulation sidebands might become inverted
• B. Received signal strength is reduced
• C. Signals have an echo effect
• D. Nothing significant will happen

T1B07

32. Which of the following VHF/UHF band segments are limited to CW only?

• A. 219 MHz to 220 MHz and 420.0 MHz to 420.1 MHz
• B. 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz
• C. 902.0 MHz to 902.1 MHz
• D. All these choices are correct

T7B03

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

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

T6C11

34. What is component 4 in figure T-3?

• A. Dummy load
• B. Ground
• C. Transmitter
• D. Antenna

T4A04

35. How are the transceiver audio input and output connected in a station configured to operate using FT8?

• A. To a computer connected to the FT8converter.com website
• B. To a computer running a terminal program and connected to a terminal node controller unit
• C. To an FT8 conversion unit, a keyboard, and a computer monitor
• D. To the audio input and output of a computer running WSJT-X software