Practice Exam

T7D04

1. Which instrument is used to measure electric current?

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

T8A04

2. Which type of modulation is commonly used for VHF and UHF voice repeaters?

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

T4B09

3. How is a specific group of stations selected on a digital voice transceiver?

• A. By entering the group's identification code
• B. By enabling the group's CTCSS tone
• C. By activating automatic identification
• D. By retrieving the frequencies from transceiver memory

T6A10

4. Which of the following battery chemistries is rechargeable?

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

T7B06

5. Which of the following actions should you take if a neighbor tells you that your station's transmissions are interfering with their radio or TV reception?

• A. Immediately turn off your transmitter and contact the nearest FCC office for assistance
• B. Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated
• C. All these choices are correct
• D. Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel

T8C09

6. Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission?

• A. EchoLink
• B. D-STAR
• C. IRLP
• D. DMR

T1D05

7. When may amateur radio operators use their stations to notify other amateurs of the availability of equipment for sale or trade?

• A. When no profit is made on the sale
• B. When selling amateur radio equipment and not on a regular basis
• C. When the equipment is not the personal property of either the station licensee, or the control operator, or their close relatives
• D. Never

T5B02

8. Which is equal to 1,500,000 hertz?

• A. 150 kHz
• B. 1500 MHz
• C. 15 GHz
• D. 1500 kHz

T0A06

9. What is a good way to guard against electrical shock at your station?

• A. Install mechanical interlocks in high-voltage circuits
• B. Use three-wire cords and plugs for all AC powered equipment
• C. All these choices are correct
• D. Connect all AC powered station equipment to a common safety ground

T3B11

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

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

T0C03

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

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

T1E04

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

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

T1B11

13. What is the maximum peak envelope power output for Technician class operators in their HF band segments?

• A. 100 watts
• B. 50 watts
• C. 10 watts
• D. 200 watts

T0B05

14. What is the purpose of a safety wire through a turnbuckle used to tension guy lines?

• A. Secure the guy line if the turnbuckle breaks
• B. Prevent loosening of the turnbuckle from vibration
• C. Provide a ground path for lightning strikes
• D. Provide an ability to measure for proper tensioning

T8B06

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

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

T2A04

16. What is an appropriate way to call another station on a repeater if you know the other station's call sign?

• A. Say "CQ" three times, then the other station's call sign
• B. Say the station's call sign, then identify with your call sign
• C. Wait for the station to call CQ, then answer
• D. Say "break, break," then say the station's call sign

T4A03

17. Why are short, heavy-gauge wires used for a transceiver's DC power connection?

• A. All these choices are correct
• B. To minimize voltage drop when transmitting
• C. To avoid RF interference
• D. To provide a good counterpoise for the antenna

T1C07

18. Which of the following can result in revocation of the station license or suspension of the operator license?

• A. Failure to have a copy of your license available at your station
• B. Failure to provide and maintain a correct email address with the FCC
• C. Failure to inform the FCC of any changes in the amateur station following performance of an RF safety environmental evaluation
• D. Failure to obtain FCC type acceptance prior to using a home-built transmitter

T2B08

19. Which of the following applies when two stations transmitting on the same frequency interfere with each other?

• A. Both stations should choose another frequency to avoid conflict
• B. The stations should negotiate continued use of the frequency
• C. Interference is inevitable, so no action is required
• D. Use subaudible tones so both stations can share the frequency

T2C10

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

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

T9A04

21. What is a disadvantage of the short, flexible antenna supplied with most handheld radio transceivers, compared to a full-sized quarter-wave antenna?

• A. All these choices are correct
• B. It has low efficiency
• C. It is mechanically fragile
• D. It transmits only circularly polarized signals

T3C06

22. What type of propagation is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis?

• A. Faraday rotation
• B. F2 region refraction
• C. Tropospheric ducting
• D. D region refraction

T3A04

23. 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. Nothing significant will happen
• C. Signals have an echo effect
• D. Received signal strength is reduced

T6D09

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

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

T6C10

25. What is component 3 in figure T-3?

• A. Variable inductor
• B. Variable capacitor
• C. Connector
• D. Meter

T5D06

26. What is the resistance of a circuit that draws 4 amperes from a 12-volt source?

• A. 48 ohms
• B. 16 ohms
• C. 3 ohms
• D. 8 ohms

T1F03

27. When are you required to transmit your assigned call sign?

• A. At least once during each transmission
• B. At least every 10 minutes during and at the end of a communication
• C. At the beginning of each contact, and every 10 minutes thereafter
• D. At least every 15 minutes during and at the end of a communication

T1A04

28. How many operator/primary station license grants may be held by any one person?

• A. One for each permanent station location from which the person plans to operate
• B. No more than two
• C. One for each band on which the person plans to operate
• D. One

T5A10

29. Which term describes the rate at which electrical energy is used?

• A. Power
• B. Resistance
• C. Current
• D. Voltage

T6B07

30. What causes a light-emitting diode (LED) to emit light?

• A. Capacitively-coupled RF signal
• B. Inductively-coupled RF signal
• C. Reverse current
• D. Forward current

T8D11

31. What is an ARQ transmission system?

• A. A system used to encrypt command signals to an amateur radio satellite
• B. A method of compressing data using autonomous reiterative Q codes prior to final encoding
• C. A special transmission format limited to video signals
• D. An error correction method in which the receiving station detects errors and sends a request for retransmission

T9B08

32. Which of the following is a source of loss in coaxial feed line?

• A. Multiple connectors in the line
• B. All these choices are correct
• C. High SWR
• D. Water intrusion into coaxial connectors

T7C10

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

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

T7A11

34. Where is an RF preamplifier installed?

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

T5C10

35. How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?

• A. 0.208 watts
• B. 14.5 watts
• C. 30 watts
• D. 4.8 watts