Practice Exam

T3C04

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

T1B09

2. Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band?

• A. To allow for calibration error in the transmitter frequency display
• B. All these choices are correct
• C. So that modulation sidebands do not extend beyond the band edge
• D. To allow for transmitter frequency drift

T4B11

3. Which of the following must be programmed into a D-STAR digital transceiver before transmitting?

• A. All these choices are correct
• B. The codec type being used
• C. Your call sign
• D. Your output power

T6D05

4. What type of circuit controls the amount of voltage from a power supply?

• A. Regulator
• B. Phase inverter
• C. Filter
• D. Oscillator

T5D12

5. What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it?

• A. 20 volts
• B. 12 volts
• C. 0.2 volts
• D. 8 volts

T7A09

6. What is the function of the SSB/CW-FM switch on a VHF power amplifier?

• A. Set the amplifier for proper operation in the selected mode
• B. Change the frequency range of the amplifier to operate in the proper segment of the band
• C. Change the mode of the transmitted signal
• D. Reduce the received signal noise

T2B13

7. What is the purpose of a squelch function?

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

T5A04

8. What are the units of electrical resistance?

• A. Coulombs
• B. Ohms
• C. Siemens
• D. Mhos

T1C05

9. Which of the following is a valid Technician class call sign format?

• A. W1XX
• B. All these choices are correct
• C. KF1XXX
• D. KA1X

T7B03

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

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

T0B03

11. Under what circumstances is it safe to climb a tower without a helper or observer?

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

T1F11

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

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

T7C03

13. What does a dummy load consist of?

• A. A low-voltage power supply and a DC relay
• B. A high-gain amplifier and a TR switch
• C. A non-inductive resistor mounted on a heat sink
• D. A 50-ohm reactance used to terminate a transmission line

T0C05

14. Why do exposure limits vary with frequency?

• A. Lower frequency RF fields have more energy than higher frequency fields
• B. Lower frequency RF fields do not penetrate the human body
• C. Higher frequency RF fields are transient in nature
• D. The human body absorbs more RF energy at some frequencies than at others

T5B07

15. Which is equal to 3.525 MHz?

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

T2A07

16. What is meant by "repeater offset"?

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

T8D07

17. Which of the following describes DMR?

• A. A digital technique for transmitting on two repeater inputs simultaneously for automatic error correction
• B. An automatic computer logging technique for hands-off logging when communicating while operating a vehicle
• C. An automatic position tracking mode for FM mobiles communicating through repeaters
• D. A technique for time-multiplexing two digital voice signals on a single 12.5 kHz repeater channel

T6B03

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

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

T3A11

19. Which region of the atmosphere can refract or bend HF and VHF radio waves?

• A. The ionosphere
• B. The stratosphere
• C. The mesosphere
• D. The troposphere

T8A02

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

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

T3B11

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

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

T7D06

22. Which of the following can damage a multimeter?

• A. Failing to connect one of the probes to ground
• B. Not allowing it to warm up properly
• C. Attempting to measure resistance using the voltage setting
• D. Attempting to measure voltage when using the resistance setting

T6A02

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

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

T5C02

24. What is the unit of capacitance?

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

T8C02

25. Which of these items would be useful for a hidden transmitter hunt?

• A. Calibrated SWR meter
• B. A directional antenna
• C. A calibrated noise bridge
• D. All these choices are correct

T4A04

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

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

T1A11

27. When is willful interference to other amateur radio stations permitted?

• A. To stop another amateur station that is breaking the FCC rules
• B. At no time
• C. At any time, stations in the Amateur Radio Service are not protected from willful interference
• D. When making short test transmissions

T1D11

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

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

T1E08

29. Which of the following is an example of automatic control?

• A. Repeater operation
• B. Using a computer or other device to send CW automatically
• C. Controlling a station over the internet
• D. Using a computer or other device to identify automatically

T6C12

30. Which of the following is accurately represented in electrical schematics?

• A. Wire lengths
• B. Physical appearance of components
• C. Component connections
• D. All these choices are correct

T8B05

31. What is a satellite beacon?

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

T9B01

32. What is a benefit of low SWR?

• A. All these choices are correct
• B. Reduced signal loss
• C. Reduced television interference
• D. Less antenna wear

T2C08

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

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

T9A10

34. In which direction does a half-wave dipole antenna radiate the strongest signal?

• A. Off the ends of the antenna
• B. Equally in all directions
• C. Broadside to the antenna
• D. In the direction of the feed line

T0A05

35. Why should a 5-ampere fuse never be replaced with a 20-ampere fuse?

• A. The larger fuse would be likely to blow because it is rated for higher current
• B. The power supply ripple would greatly increase
• C. Excessive current could cause a fire
• D. All these choices are correct