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. - T0A06

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

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

2. - T0B03

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

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

3. - T0C12

How does RF radiation differ from ionizing radiation (radioactivity)?

Select	Answer
A	RF radiation does not have sufficient energy to cause chemical changes in cells and damage DNA
B	RF radiation can only be detected with an RF dosimeter
C	RF radiation is limited in range to a few feet
D	RF radiation is perfectly safe

4. - T1A11

When is willful interference to other amateur radio stations permitted?

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

5. - T1B05

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

Select	Answer
A	Spread spectrum only
B	Emergency traffic only
C	Fixed digital message forwarding systems 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 inform the FCC of any changes in the amateur station following performance of an RF safety environmental evaluation
B	Failure to provide and maintain a correct email address with the FCC
C	Failure to have a copy of your license available at your station
D	Failure to obtain FCC type acceptance prior to using a home-built transmitter

7. - T1D07

What types of amateur stations can automatically retransmit the signals of other amateur stations?

Select	Answer
A	Earth, repeater, or space stations
B	Beacon, repeater, or space stations
C	Auxiliary, beacon, or Earth stations
D	Repeater, auxiliary, or space stations

8. - T1E08

Which of the following is an example of automatic control?

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

9. - T1F08

What is the definition of third party communications?

Select	Answer
A	A message from a control operator to another amateur station control operator on behalf of another person
B	Amateur radio communications where three stations are in communications with one another
C	Temporary authorization for an unlicensed person to transmit on the amateur bands for technical experiments
D	Operation when the transmitting equipment is licensed to a person other than the control operator

10. - T2A12

What should you do before calling CQ?

Select	Answer
A	Make sure you are authorized to use that frequency
B	All these choices are correct
C	Listen first to be sure that no one else is using the frequency
D	Ask if the frequency is in use

11. - T2B13

What is the purpose of a squelch function?

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

12. - T2C04

What is RACES?

Select	Answer
A	A radio contest held in a short period, sometimes called a “sprint”
B	An FCC part 97 amateur radio service for civil defense communications during national emergencies
C	An international radio experimentation society
D	An emergency organization combining amateur radio and citizens band operators and frequencies

13. - T3A02

What is the effect of vegetation on UHF and microwave signals?

Select	Answer
A	Knife-edge diffraction
B	Absorption
C	Amplification
D	Polarization rotation

14. - T3B08

What frequency range is referred to as VHF?

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

15. - T3C02

What is a characteristic of HF communication compared with communications on VHF and higher frequencies?

Select	Answer
A	There is less atmospheric interference (static) on HF
B	HF antennas are generally smaller
C	HF accommodates wider bandwidth signals
D	Long-distance ionospheric propagation is far more common on HF

16. - T4A02

Which of the following should be considered when selecting an accessory SWR meter?

Select	Answer
A	The types of modulation being used at the station
B	All these choices are correct
C	The distance that the meter will be located from the antenna
D	The frequency and power level at which the measurements will be made

17. - T4B09

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

Select	Answer
A	By retrieving the frequencies from transceiver memory
B	By activating automatic identification
C	By entering the group’s identification code
D	By enabling the group’s CTCSS tone

18. - T5A03

What is the name for the flow of electrons in an electric circuit?

Select	Answer
A	Resistance
B	Voltage
C	Capacitance
D	Current

19. - T5B10

Which decibel value most closely represents a power decrease from 12 watts to 3 watts?

Select	Answer
A	-9 dB
B	-6 dB
C	-1 dB
D	-3 dB

20. - T5C04

What is the unit of inductance?

Select	Answer
A	The farad
B	The ohm
C	The coulomb
D	The henry

21. - T5D14

In which type of circuit is voltage the same across all components?

Select	Answer
A	Resonant
B	Branch
C	Series
D	Parallel

22. - T6A08

What is the function of an SPDT switch?

Select	Answer
A	Two circuits are each switched between one of two other circuits
B	A single circuit is opened or closed
C	A single circuit is switched between one of two other circuits
D	Two circuits are opened or closed

23. - T6B10

Which of the following can provide power gain?

Select	Answer
A	Reactor
B	Transistor
C	Resistor
D	Transformer

24. - T6C02

What is component 1 in figure T-1?

Select	Answer
A	Battery
B	Transistor
C	Resistor
D	Connector

25. - T6D04

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

Select	Answer
A	Relay
B	Meter
C	Potentiometer
D	Transistor

26. - T7A01

Which term describes the ability of a receiver to detect the presence of a signal?

Select	Answer
A	Total Harmonic Distortion
B	Selectivity
C	Sensitivity
D	Linearity

27. - T7B10

What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible?

Select	Answer
A	You are in a bad location
B	All these choices are correct
C	Your transmitter is slightly off frequency
D	Your batteries are running low

28. - T7C09

Which of the following causes failure of coaxial cables?

Select	Answer
A	Solder flux contamination
B	Operation at 100% duty cycle for an extended period
C	Moisture contamination
D	Rapid fluctuation in transmitter output power

29. - T7D11

Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter?

Select	Answer
A	Ensure that the circuit is not powered
B	Ensure that the applied voltages are correct
C	Ensure that the circuit is operating at the correct frequency
D	Ensure that the circuit is grounded

30. - T8A04

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

Select	Answer
A	AM
B	PSK
C	SSB
D	FM or PM

31. - T8B09

What causes spin fading of satellite signals?

Select	Answer
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

32. - T8C01

Which of the following methods is used to locate sources of noise interference or jamming?

Select	Answer
A	Echolocation
B	Radio direction finding
C	Doppler radar
D	Phase locking

33. - T8D07

Which of the following describes DMR?

Select	Answer
A	A technique for time-multiplexing two digital voice signals on a single 12.5 kHz repeater channel
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 digital technique for transmitting on two repeater inputs simultaneously for automatic error correction

34. - T9A04

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

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

35. - T9B04

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

Select	Answer
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

Figure T-1