US Amateur Radio - Technician (Element 2, 2022-2026) Practice Test

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US Amateur Radio - Technician (Element 2, 2022-2026) Practice Test

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1. - T0A01

Which of the following is a safety hazard of a 12-volt storage battery?

Select	Answer
A	Touching both terminals with the hands can cause electrical shock
B	Shorting the terminals can cause burns, fire, or an explosion
C	All these choices are correct
D	RF emissions from a nearby transmitter can cause the electrolyte to emit poison gas

2. - T0B06

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

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

3. - T0C10

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

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

4. - T1A01

Which of the following is part of the Basis and Purpose of the Amateur Radio Service?

Select	Answer
A	Advancing skills in the technical and communication phases of the radio art
B	Providing communications for international non-profit organizations
C	All these choices are correct
D	Providing personal radio communications for as many citizens as possible

5. - T1B05

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

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

6. - T1C07

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

Select	Answer
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

7. - T1D04

Under what conditions is an amateur station authorized to transmit music using a phone emission?

Select	Answer
A	When the music is transmitted above 1280 MHz
B	When transmissions are limited to less than three minutes per hour
C	When incidental to an authorized retransmission of manned spacecraft communications
D	When the music produces no spurious emissions

8. - T1E03

Who must designate the station control operator?

Select	Answer
A	The frequency coordinator
B	The station licensee
C	The FCC
D	Any licensed operator

9. - T1F05

What method of call sign identification is required for a station transmitting phone signals?

Select	Answer
A	Send the call sign using only a phone emission
B	Send the call sign followed by the indicator R
C	Send the call sign using a CW or phone emission
D	Send the call sign followed by the indicator RPT

10. - T2A04

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

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

11. - T2B04

Which of the following could be the reason you are unable to access a repeater whose output you can hear?

Select	Answer
A	You are using the wrong DCS code
B	You are using the wrong CTCSS tone
C	All these choices are correct
D	Improper transceiver offset

12. - T2C11

What is meant by “check” in a radiogram header?

Select	Answer
A	A list of stations that have relayed the message
B	The call sign of the originating station
C	A box on the message form that indicates that the message was received and/or relayed
D	The number of words or word equivalents in the text portion of the message

13. - T3A01

Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet?

Select	Answer
A	VHF ionospheric propagation is very sensitive to path length
B	All these choices are correct
C	Multipath propagation cancels or reinforces signals
D	The signal path encounters different concentrations of water vapor

14. - T3B09

What frequency range is referred to as UHF?

Select	Answer
A	30 to 300 MHz
B	300 to 3000 MHz
C	300 to 3000 kHz
D	30 to 300 kHz

15. - T3C08

What causes tropospheric ducting?

Select	Answer
A	Discharges of lightning during electrical storms
B	Temperature inversions in the atmosphere
C	Sunspots and solar flares
D	Updrafts from hurricanes and tornadoes

16. - T4A01

Which of the following is an appropriate power supply rating for a typical 50 watt output mobile FM transceiver?

Select	Answer
A	13.8 volts at 12 amperes
B	24.0 volts at 4 amperes
C	24.0 volts at 12 amperes
D	13.8 volts at 4 amperes

17. - T4B12

What is the result of tuning an FM receiver above or below a signal’s frequency?

Select	Answer
A	Distortion of the signal’s audio
B	Sideband inversion
C	Generation of a heterodyne tone
D	Change in audio pitch

18. - T5A01

Electrical current is measured in which of the following units?

Select	Answer
A	Volts
B	Watts
C	Amperes
D	Ohms

19. - T5B06

Which is equal to 3000 milliamperes?

Select	Answer
A	0.003 amperes
B	0.3 amperes
C	3,000,000 amperes
D	3 amperes

20. - T5C03

What describes the ability to store energy in a magnetic field?

Select	Answer
A	Resistance
B	Admittance
C	Capacitance
D	Inductance

21. - T5D06

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

Select	Answer
A	48 ohms
B	8 ohms
C	16 ohms
D	3 ohms

22. - T6A12

What type of switch is represented by component 3 in figure T-2?

Select	Answer
A	Single-pole single-throw
B	Single-pole double-throw
C	Double-pole double-throw
D	Double-pole single-throw

23. - T6B10

Which of the following can provide power gain?

Select	Answer
A	Reactor
B	Transformer
C	Transistor
D	Resistor

24. - T6C01

What is the name of an electrical wiring diagram that uses standard component symbols?

Select	Answer
A	Connector pinout
B	Bill of materials
C	Schematic
D	Flow chart

25. - T6D01

Which of the following devices or circuits changes an alternating current into a varying direct current signal?

Select	Answer
A	Amplifier
B	Reflector
C	Transformer
D	Rectifier

26. - T7A05

What is the name of a circuit that generates a signal at a specific frequency?

Select	Answer
A	Oscillator
B	Low-pass filter
C	Phase modulator
D	Reactance modulator

27. - T7B07

Which of the following can reduce overload of a VHF transceiver by a nearby commercial FM station?

Select	Answer
A	Installing bypass capacitors on the microphone cable
B	Using double-shielded coaxial cable
C	Installing a band-reject filter
D	Installing an RF preamplifier

28. - T7C05

Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level?

Select	Answer
A	To protect the output amplifier transistors
B	To comply with FCC rules on spectral purity
C	To lower the SWR on the transmission line
D	Because power supplies cannot supply enough current at high SWR

29. - T7D07

Which of the following measurements are made using a multimeter?

Select	Answer
A	All these choices are correct
B	Impedance and reactance
C	Voltage and resistance
D	Signal strength and noise

30. - T8A03

Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands?

Select	Answer
A	FM
B	PM
C	SSB
D	DRM

31. - T8B07

What is Doppler shift in reference to satellite communications?

Select	Answer
A	A special digital communications mode for some satellites
B	A change in the satellite orbit
C	An observed change in signal frequency caused by relative motion between the satellite and Earth station
D	A mode where the satellite receives signals on one band and transmits on another

32. - T8C02

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

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

33. - T8D05

Which of the following is an application of APRS?

Select	Answer
A	Providing real-time tactical digital communications in conjunction with a map showing the locations of stations
B	Providing information on the number of stations signed into a repeater
C	Providing voice over internet connection between repeaters
D	Showing automatically the number of packets transmitted via PACTOR during a specific time interval

34. - T9A11

What is antenna gain?

Select	Answer
A	The additional power that is required in the antenna when transmitting on a higher frequency
B	The increase in impedance on receive or transmit compared to a reference antenna
C	The increase in signal strength in a specified direction compared to a reference antenna
D	The additional power that is added to the transmitter power

35. - T9B04

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

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

Figure T-2