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. - T0A11

What hazard exists in a power supply immediately after turning it off?

Select	Answer
A	Leakage flux in the power transformer
B	Voltage transients from kickback diodes
C	Charge stored in filter capacitors
D	Circulating currents in the dc filter

2. - T0B08

Which is a proper grounding method for a tower?

Select	Answer
A	Separate eight-foot ground rods for each tower leg, bonded to the tower and each other
B	A connection between the tower base and a cold water pipe
C	A single four-foot ground rod, driven into the ground no more than 12 inches from the base
D	A ferrite-core RF choke connected between the tower and ground

3. - T0C11

What is the definition of duty cycle during the averaging time for RF exposure?

Select	Answer
A	The difference between the PEP and average power output of a transmitter
B	The difference between the lowest power output and the highest power output of a transmitter
C	The percentage of time that a transmitter is not transmitting
D	The percentage of time that a transmitter is transmitting

4. - T1A08

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

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

5. - T1B03

Which frequency is in the 6 meter amateur band?

Select	Answer
A	49.00 MHz
B	28.50 MHz
C	222.15 MHz
D	52.525 MHz

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

7. - T1D06

What, if any, are the restrictions concerning transmission of language that may be considered indecent or obscene?

Select	Answer
A	There is no such prohibition
B	The ITU maintains a list of words that are not permitted to be used on amateur frequencies
C	The FCC maintains a list of words that are not permitted to be used on amateur frequencies
D	Any such language is prohibited

8. - T1E11

Who does the FCC presume to be the control operator of an amateur station, unless documentation to the contrary is in the station records?

Select	Answer
A	The third party participant
B	The station licensee
C	The person operating the station equipment
D	The station custodian

9. - T1F01

When must the station and its records be available for FCC inspection?

Select	Answer
A	At any time ten days after notification by the FCC of such an inspection
B	At any time upon request by an FCC representative
C	At any time after written notification by the FCC of such inspection
D	Only when presented with a valid warrant by an FCC official or government agent

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. - T2B06

What type of signaling uses pairs of audio tones?

Select	Answer
A	GPRS
B	CTCSS
C	D-STAR
D	DTMF

12. - T2C05

What does the term “traffic” refer to in net operation?

Select	Answer
A	The number of stations checking in and out of a net
B	Operation by mobile or portable stations
C	Requests to activate the net by a served agency
D	Messages exchanged by net stations

13. - T3A09

Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized?

Select	Answer
A	Either vertically or horizontally polarized antennas may be used for transmission or reception
B	FM voice is unusable
C	Digital modes are unusable
D	Both the transmitting and receiving antennas must be of the same polarization

14. - T3B05

What is the relationship between wavelength and frequency?

Select	Answer
A	Wavelength and frequency increase as path length increases
B	Wavelength gets longer as frequency increases
C	Wavelength gets shorter as frequency increases
D	Wavelength and frequency are unrelated

15. - T3C05

Which of the following effects may allow radio signals to travel beyond obstructions between the transmitting and receiving stations?

Select	Answer
A	Doppler shift
B	Faraday rotation
C	Knife-edge diffraction
D	Quantum tunneling

16. - T4A06

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

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

17. - T4B07

What does a DMR “code plug” contain?

Select	Answer
A	Your call sign in CW for automatic identification
B	Access information for repeaters and talkgroups
C	The DMR software version
D	The codec for digitizing audio

18. - T5A06

What is the unit of frequency?

Select	Answer
A	Hertz
B	Tesla
C	Farad
D	Henry

19. - T5B01

How many milliamperes is 1.5 amperes?

Select	Answer
A	15 milliamperes
B	15,000 milliamperes
C	1500 milliamperes
D	150 milliamperes

20. - T5C08

What is the formula used to calculate electrical power (P) in a DC circuit?

Select	Answer
A	P = E / I
B	P = I + E
C	P = E – I
D	P = I  E

21. - T5D09

What is the current through a 24-ohm resistor connected across 240 volts?

Select	Answer
A	216 amperes
B	24,000 amperes
C	0.1 amperes
D	10 amperes

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. - T6B01

Which is true about forward voltage drop in a diode?

Select	Answer
A	It is lower in some diode types than in others
B	It indicates that the diode is defective
C	It has no impact on the voltage delivered to the load
D	It is proportional to peak inverse voltage

24. - T6C03

What is component 2 in figure T-1?

Select	Answer
A	Indicator lamp
B	Resistor
C	Transistor
D	Connector

25. - T6D01

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

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

27. - T7B07

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

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

28. - T7C07

What happens to power lost in a feed line?

Select	Answer
A	It increases the SWR
B	It distorts the signal
C	It is radiated as harmonics
D	It is converted into heat

29. - T7D11

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

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

30. - T8A07

What is a characteristic of single sideband (SSB) compared to FM?

Select	Answer
A	SSB signals are easier to tune in correctly
B	SSB signals are less susceptible to interference
C	All these choices are correct
D	SSB signals have narrower bandwidth

31. - T8B02

What is the impact of using excessive effective radiated power on a satellite uplink?

Select	Answer
A	Possibility of commanding the satellite to an improper mode
B	Overloading the satellite batteries
C	Possibility of rebooting the satellite control computer
D	Blocking access by other users

32. - T8C04

Which of the following is good procedure when contacting another station in a contest?

Select	Answer
A	Sign only the last two letters of your call if there are many other stations calling
B	All these choices are correct
C	Send only the minimum information needed for proper identification and the contest exchange
D	Contact the station twice to be sure that you are in his log

33. - T8D05

Which of the following is an application of APRS?

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

34. - T9A10

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

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

35. - T9B08

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

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

Figure T-1