Practice Exam

T8D02

1. 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 group of operators sharing common interests
• C. A net that meets at a specified time
• D. A way for groups of users to share a channel at different times without hearing other users on the channel

T6B04

2. Which of the following components can consist of three regions of semiconductor material?

• A. Triode
• B. Pentagrid converter
• C. Alternator
• D. Transistor

T2B03

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

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

T5D03

4. What formula is used to calculate resistance in a circuit?

• A. R = E x I
• B. R = E + I
• C. R = E - I
• D. R = E / I

T9A12

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

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

T2A07

6. What is meant by "repeater offset"?

• A. The repeater has a time delay to prevent interference
• B. The difference between a repeater's transmit and receive frequencies
• C. The repeater station identification is done on a separate frequency
• D. The number of simultaneous transmit frequencies used by a repeater

T8B05

7. What is a satellite beacon?

• A. A reflective surface on the satellite
• B. An indicator light that shows where to point your antenna
• C. The primary transmit antenna on the satellite
• D. A transmission from a satellite that contains status information

T1A03

8. What do the FCC rules state regarding the use of a phonetic alphabet for station identification in the Amateur Radio Service?

• A. It is required when in contact with foreign stations
• B. It is required when transmitting emergency messages
• C. All these choices are correct
• D. It is encouraged

T0A11

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

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

T7C02

10. Which of the following is used to determine if an antenna is resonant at the desired operating frequency?

• A. An antenna analyzer
• B. A VTVM
• C. A frequency counter
• D. A Q meter

T4B07

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

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

T1B05

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

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

T8A07

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

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

T5C05

14. What is the unit of impedance?

• A. The volt
• B. The coulomb
• C. The ohm
• D. The ampere

T3A05

15. When using a directional antenna, how might your station be able to communicate with a distant repeater if buildings or obstructions are blocking the direct line of sight path?

• A. Try the long path
• B. Change from vertical to horizontal polarization
• C. Try to find a path that reflects signals to the repeater
• D. Increase the antenna SWR

T3C04

16. Which of the following types of propagation is most commonly associated with occasional strong signals on the 10, 6, and 2 meter bands from beyond the radio horizon?

• A. Backscatter
• B. D region absorption
• C. Gray-line propagation
• D. Sporadic E

T2C09

17. Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class?

• A. Yes, but only in situations involving the immediate safety of human life or protection of property
• B. Yes, but only when part of a RACES emergency plan
• C. Yes, but only when part of a FEMA emergency plan
• D. No

T1D06

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

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

T0C03

19. How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percent?

• A. It decreases by 50 percent
• B. It increases by a factor of 2
• C. There is no adjustment allowed for lower duty cycle
• D. It increases by a factor of 3

T1C09

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

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

T3B03

21. What are the two components of a radio wave?

• A. Impedance and reactance
• B. Electric and magnetic fields
• C. Voltage and current
• D. Ionizing and non-ionizing radiation

T4A04

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

• A. To the audio input and output of a computer running WSJT-X software
• 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 a computer connected to the FT8converter.com website

T5B10

23. Which decibel value most closely represents a power decrease from 12 watts to 3 watts?

• A. -1 dB
• B. -9 dB
• C. -6 dB
• D. -3 dB

T5A02

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

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

T8C08

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

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

T6A03

26. What electrical parameter is controlled by a potentiometer?

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

T6C02

27. What is component 1 in figure T-1?

• A. Battery
• B. Transistor
• C. Connector
• D. Resistor

T7B03

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

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

T1F04

29. What language may you use for identification when operating in a phone sub-band?

• A. English, French, or Spanish
• B. Any language recognized by the United Nations
• C. Any language recognized by the ITU
• D. English

T1E07

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

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

T0B02

31. What is required when climbing an antenna tower?

• A. Have sufficient training on safe tower climbing techniques
• B. Always wear an approved climbing harness
• C. Use appropriate tie-off to the tower at all times
• D. All these choices are correct

T7A04

32. Which term describes the ability of a receiver to discriminate between multiple signals?

• A. Sensitivity
• B. Selectivity
• C. Harmonic distortion
• D. Discrimination ratio

T6D10

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

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

T7D03

34. When configured to measure current, how is a multimeter connected to a component?

• A. In parallel
• B. In series
• C. In quadrature
• D. In phase

T9B11

35. Which of the following types of feed line has the lowest loss at VHF and UHF?

• A. Multi-conductor unbalanced cable
• B. Air-insulated hardline
• C. 50-ohm flexible coax
• D. 75-ohm flexible coax