Practice Exam

T8C07

1. What is Voice Over Internet Protocol (VoIP)?

• A. A set of rules specifying how to identify your station when linked over the internet to another station
• B. A technique for measuring the modulation quality of a transmitter using remote sites monitored via the internet
• C. A method of delivering voice communications over the internet using digital techniques
• D. A technique employed to "spot" DX stations via the internet

T7A11

2. Where is an RF preamplifier installed?

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

T2B13

3. What is the purpose of a squelch function?

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

T6D10

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

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

T1B07

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

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

T6A10

6. Which of the following battery chemistries is rechargeable?

• A. All these choices are correct
• B. Lithium-ion
• C. Nickel-metal hydride
• D. Lead-acid

T5C04

7. What is the unit of inductance?

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

T0C10

8. Why is duty cycle one of the factors used to determine safe RF radiation exposure levels?

• A. It takes into account the antenna feed line loss
• B. It affects the peak exposure to radiation
• C. It affects the average exposure to radiation
• D. It takes into account the thermal effects of the final amplifier

T8B01

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

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

T9B11

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

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

T6C04

11. What is component 3 in figure T-1?

• A. Ground symbol
• B. Resistor
• C. Lamp
• D. Transistor

T7B04

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

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

T6B03

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

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

T8A02

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

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

T9A06

15. Which of the following types of antenna offers the greatest gain?

• A. 5/8 wave vertical
• B. J pole
• C. Yagi
• D. Isotropic

T3C01

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

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

T8D06

17. What does the abbreviation "PSK" mean?

• A. Packet Short Keying
• B. Phased Slide Keying
• C. Phase Shift Keying
• D. Pulse Shift Keying

T1A06

18. What is the FCC Part 97 definition of a beacon?

• A. A government transmitter marking the amateur radio band edges
• B. A continuous transmission of weather information authorized in the amateur bands by the National Weather Service
• C. A bulletin sent by the FCC to announce a national emergency
• D. An amateur station transmitting communications for the purposes of observing propagation or related experimental activities

T5A08

19. Which of the following is a good electrical insulator?

• A. Mercury
• B. Aluminum
• C. Copper
• D. Glass

T1C06

20. From which of the following locations may an FCC-licensed amateur station transmit?

• A. From any vessel or craft located in international waters and documented or registered in the United States
• B. From within any country that is a member of the United Nations
• C. From anywhere within International Telecommunication Union (ITU) Regions 2 and 3
• D. From within any country that belongs to the International Telecommunication Union

T4A08

21. Which of the following conductors is preferred for bonding at RF?

• A. Flat copper strap
• B. Twisted-pair cable
• C. Steel wire
• D. Copper braid removed from coaxial cable

T2A11

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

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

T2C06

23. What is the Amateur Radio Emergency Service (ARES)?

• A. A training program that provides licensing courses for those interested in obtaining an amateur license to use during emergencies
• B. A training program that certifies amateur operators for membership in the Radio Amateur Civil Emergency Service
• C. A group of licensed amateurs who have voluntarily registered their qualifications and equipment for communications duty in the public service
• D. A group of licensed amateurs who are members of the military and who voluntarily agreed to provide message handling services in the case of an emergency

T0A11

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

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

T7C10

25. Why should the outer jacket of coaxial cable be resistant to ultraviolet light?

• A. Ultraviolet light can damage the jacket and allow water to enter the cable
• B. Ultraviolet resistant jackets prevent harmonic radiation
• C. Ultraviolet and RF signals can mix, causing interference
• D. Ultraviolet light can increase losses in the cable's jacket

T5D09

26. What is the current through a 24-ohm resistor connected across 240 volts?

• A. 24,000 amperes
• B. 216 amperes
• C. 10 amperes
• D. 0.1 amperes

T1D11

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

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

T3B02

28. What property of a radio wave defines its polarization?

• A. The ratio of the energy in the magnetic field to the energy in the electric field
• B. The ratio of the velocity to the wavelength
• C. The orientation of the magnetic field
• D. The orientation of the electric field

T7D04

29. Which instrument is used to measure electric current?

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

T1F11

30. Which of the following is a requirement for the issuance of a club station license grant?

• A. The club must be registered with the American Radio Relay League
• B. The trustee must have an Amateur Extra Class operator license grant
• C. All these choices are correct
• D. The club must have at least four members

T5B01

31. How many milliamperes is 1.5 amperes?

• A. 150 milliamperes
• B. 1500 milliamperes
• C. 15,000 milliamperes
• D. 15 milliamperes

T0B06

32. What is the minimum safe distance from a power line to allow when installing an antenna?

• A. 1/2 wavelength at the operating frequency
• B. Enough so that if the antenna falls, no part of it can come closer than 10 feet to the power wires
• C. Add the height of the antenna to the height of the power line and multiply by a factor of 1.5
• D. The height of the power line above ground

T1E01

33. When may an amateur station transmit without a control operator?

• A. When the transmitting station is an auxiliary station
• B. When using automatic control, such as in the case of a repeater
• C. Never
• D. When the station licensee is away and another licensed amateur is using the station

T4B07

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

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

T3A08

35. What is a likely cause of irregular fading of signals propagated by the ionosphere?

• A. Random combining of signals arriving via different paths
• B. Interference from thunderstorms
• C. Intermodulation distortion
• D. Frequency shift due to Faraday rotation