Practice Exam

T4A06

1. What signals are used in a computer-radio interface for digital mode operation?

• A. Receive and transmit mode, status, and location
• B. NMEA GPS location and DC power
• C. Receive audio, transmit audio, and transmitter keying
• D. Antenna and RF power

T5C06

2. What does the abbreviation "RF" mean?

• A. The real frequency transmitted as opposed to the apparent frequency
• B. Reflective force in antenna transmission lines
• C. The resonant frequency of a tuned circuit
• D. Radio frequency signals of all types

T0C08

3. Which of the following actions can reduce exposure to RF radiation?

• A. Increase the duty cycle
• B. All these choices are correct
• C. Relocate the transmitter
• D. Relocate antennas

T9A02

4. Which of the following describes a type of antenna loading?

• A. Strengthening the radiating elements of a beam antenna to better resist wind damage
• B. Electrically lengthening by inserting inductors in radiating elements
• C. Inserting a resistor in the radiating portion of the antenna to make it resonant
• D. Installing a spring in the base of a mobile vertical antenna to make it more flexible

T3B07

5. In addition to frequency, which of the following is used to identify amateur radio bands?

• A. The approximate wavelength in meters
• B. Channel numbers
• C. Traditional letter/number designators
• D. All these choices are correct

T6B09

6. What are the names for the electrodes of a diode?

• A. Gate and base
• B. Anode and cathode
• C. Source and drain
• D. Plus and minus

T5D01

7. What formula is used to calculate current in a circuit?

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

T7B04

8. 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. Low-pass filter
• C. Preamplifier
• D. Ferrite choke

T8C11

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

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

T4B10

10. Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?

• A. 5000 Hz
• B. 1000 Hz
• C. 500 Hz
• D. 2400 Hz

T0B05

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

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

T5A11

12. What type of current flow is opposed by resistance?

• A. RF current
• B. All these choices are correct
• C. Direct current
• D. Alternating current

T3A10

13. What effect does multi-path propagation have on data transmissions?

• A. Transmission rates must be decreased by a factor equal to the number of separate paths observed
• B. Error rates are likely to increase
• C. No significant changes will occur if the signals are transmitted using FM
• D. Transmission rates must be increased by a factor equal to the number of separate paths observed

T7D10

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

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

T1D03

15. When is it permissible to transmit messages encoded to obscure their meaning?

• A. Never
• B. Only when transmitting control commands to space stations or radio control craft
• C. Only when transmitting certain approved digital codes
• D. Only during contests

T6A02

16. What type of component is often used as an adjustable volume control?

• A. Power resistor
• B. Fixed resistor
• C. Potentiometer
• D. Transformer

T6C03

17. What is component 2 in figure T-1?

• A. Resistor
• B. Indicator lamp
• C. Transistor
• D. Connector

T1E01

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

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

T0A12

19. Which of the following precautions should be taken when measuring high voltages with a voltmeter?

• A. Ensure that the voltmeter has very low impedance
• B. Ensure that the circuit is grounded through the voltmeter
• C. Ensure that the voltmeter and leads are rated for use at the voltages to be measured
• D. Ensure that the voltmeter is set to the correct frequency

T5B07

20. Which is equal to 3.525 MHz?

• A. 3,525,000 kHz
• B. 3525 kHz
• C. 35.25 kHz
• D. 0.003525 kHz

T3C06

21. 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. Tropospheric ducting
• C. F2 region refraction
• D. D region refraction

T8A10

22. What is the approximate bandwidth of AM fast-scan TV transmissions?

• A. About 6 MHz
• B. About 3 MHz
• C. More than 10 MHz
• D. About 1 MHz

T7A08

23. Which of the following describes combining speech with an RF carrier signal?

• A. Oscillation
• B. Impedance matching
• C. Modulation
• D. Low-pass filtering

T2B06

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

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

T2C08

25. Which of the following is a characteristic of good traffic handling?

• A. Ensuring that any newsworthy messages are relayed to the news media
• B. All these choices are correct
• C. Making decisions as to whether messages are worthy of relay or delivery
• D. Passing messages exactly as received

T1B12

26. Except for some specific restrictions, what is the maximum peak envelope power output for Technician class operators using frequencies above 30 MHz?

• A. 100 watts
• B. 50 watts
• C. 500 watts
• D. 1500 watts

T6D04

27. Which of the following displays an electrical quantity as a numeric value?

• A. Transistor
• B. Meter
• C. Potentiometer
• D. Relay

T1F07

28. Which of the following restrictions apply when a non-licensed person is allowed to speak to a foreign station using a station under the control of a licensed amateur operator?

• A. The person must be a U.S. citizen
• B. The foreign station must be in a country with which the U.S. has a third party agreement
• C. The licensed control operator must do the station identification
• D. All these choices are correct

T7C11

29. What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types?

• A. It has more loss per foot
• B. It requires special techniques to prevent moisture in the cable
• C. It cannot be used at below freezing temperatures
• D. It cannot be used for VHF or UHF antennas

T1C11

30. If your license has expired and is still within the allowable grace period, may you continue to transmit on the amateur radio bands?

• A. No, you must wait until the license has been renewed
• B. Yes, for up to one year
• C. Yes, for up to two years
• D. Yes, as soon as you apply for renewal

T9B04

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

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

T8B09

32. What causes spin fading of satellite signals?

• A. Doppler shift of the received signal
• B. Interfering signals within the satellite uplink band
• C. Circular polarized noise interference radiated from the sun
• D. Rotation of the satellite and its antennas

T1A08

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

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

T2A09

34. Which of the following indicates that a station is listening on a repeater and looking for a contact?

• A. "QSY" followed by your call sign
• B. The repeater call sign followed by the station's call sign
• C. The station's call sign followed by the word "monitoring"
• D. "CQ CQ" followed by the repeater's call sign

T8D01

35. Which of the following is a digital communications mode?

• A. IEEE 802.11
• B. All these choices are correct
• C. FT8
• D. Packet radio