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

2. - T0B06

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

Select	Answer
A	1/2 wavelength at the operating frequency
B	The height of the power line above ground
C	Add the height of the antenna to the height of the power line and multiply by a factor of 1.5
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 affects the average exposure to radiation
B	It takes into account the thermal effects of the final amplifier
C	It affects the peak exposure to radiation
D	It takes into account the antenna feed line loss

4. - T1A06

What is the FCC Part 97 definition of a beacon?

Select	Answer
A	An amateur station transmitting communications for the purposes of observing propagation or related experimental activities
B	A government transmitter marking the amateur radio band edges
C	A bulletin sent by the FCC to announce a national emergency
D	A continuous transmission of weather information authorized in the amateur bands by the National Weather Service

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	Emergency traffic only
C	Spread spectrum only
D	Fast-scan television only

6. - T1C03

What types of international communications are an FCC-licensed amateur radio station permitted to make?

Select	Answer
A	Communications incidental to the purposes of the Amateur Radio Service and remarks of a personal character
B	Only communications incidental to contest exchanges; all other communications are prohibited
C	Any communications that would be permitted by an international broadcast station
D	Communications incidental to conducting business or remarks of a personal nature

7. - T1D02

Under which of the following circumstances are one-way transmissions by an amateur station prohibited?

Select	Answer
A	Broadcasting
B	In all circumstances
C	International Morse Code Practice
D	Telecommand or transmissions of telemetry

8. - T1E05

What is an amateur station’s control point?

Select	Answer
A	The location of the station’s transmitting antenna
B	The location at which the control operator function is performed
C	The mailing address of the station licensee
D	The location of the station’s transmitting apparatus

9. - T1F11

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

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

10. - T2A01

What is a common repeater frequency offset in the 2 meter band?

Select	Answer
A	Plus or minus 5 MHz
B	Plus or minus 600 kHz
C	Plus or minus 1 MHz
D	Plus or minus 500 kHz

11. - T2B09

Why are simplex channels designated in the VHF/UHF band plans?

Select	Answer
A	So stations within range of each other can communicate without tying up a repeater
B	For contest operation
C	So stations with simple transmitters can access the repeater without automated offset
D	For working DX only

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	The number of words or word equivalents in the text portion of the message
D	A box on the message form that indicates that the message was received and/or relayed

13. - T3A07

What weather condition might decrease range at microwave frequencies?

Select	Answer
A	Low barometric pressure
B	Colder temperatures
C	Precipitation
D	High winds

14. - T3B05

What is the relationship between wavelength and frequency?

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

15. - T3C05

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

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

16. - T4A08

Which of the following conductors is preferred for bonding at RF?

Select	Answer
A	Flat copper strap
B	Twisted-pair cable
C	Steel wire
D	Copper braid removed from coaxial cable

17. - T4B04

What is a way to enable quick access to a favorite frequency or channel on your transceiver?

Select	Answer
A	Enable the frequency offset
B	Store it in a memory channel
C	Use the scan mode to select the desired frequency
D	Enable the VOX

18. - T5A10

Which term describes the rate at which electrical energy is used?

Select	Answer
A	Current
B	Power
C	Resistance
D	Voltage

19. - T5B12

Which is equal to 28400 kHz?

Select	Answer
A	2.800 MHz
B	28.400 MHz
C	28.400 kHz
D	284.00 MHz

20. - T5C03

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

Select	Answer
A	Resistance
B	Capacitance
C	Admittance
D	Inductance

21. - T5D04

What is the resistance of a circuit in which a current of 3 amperes flows when connected to 90 volts?

Select	Answer
A	93 ohms
B	3 ohms
C	30 ohms
D	270 ohms

22. - T6A01

What electrical component opposes the flow of current in a DC circuit?

Select	Answer
A	Resistor
B	Transformer
C	Inverter
D	Inductor

23. - T6B12

What are the names of the electrodes of a bipolar junction transistor?

Select	Answer
A	Pole one, pole two, output
B	Input, output, supply
C	Emitter, base, collector
D	Signal, bias, power

24. - T6C11

What is component 4 in figure T-3?

Select	Answer
A	Ground
B	Antenna
C	Transmitter
D	Dummy load

25. - T6D04

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

Select	Answer
A	Relay
B	Transistor
C	Potentiometer
D	Meter

26. - T7A08

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

Select	Answer
A	Low-pass filtering
B	Modulation
C	Oscillation
D	Impedance matching

27. - T7B02

What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally?

Select	Answer
A	The receiver is unable to reject strong signals outside the AM or FM band
B	The audio amplifier of the transmitter is overloaded
C	The deviation of an FM transmitter is set too low
D	The microphone gain of the transmitter is turned up too high

28. - T7C05

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

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

29. - T7D02

How is a voltmeter connected to a component to measure applied voltage?

Select	Answer
A	In phase
B	In series
C	In quadrature
D	In parallel

30. - T8A02

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

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

31. - T8B08

What is meant by the statement that a satellite is operating in U/V mode?

Select	Answer
A	The satellite operates using ultraviolet frequencies
B	The satellite uplink is in the 15 meter band and the downlink is in the 10 meter band
C	The satellite frequencies are usually variable
D	The satellite uplink is in the 70 centimeter band and the downlink is in the 2 meter band

32. - T8C04

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

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

33. - T8D11

What is an ARQ transmission system?

Select	Answer
A	A method of compressing data using autonomous reiterative Q codes prior to final encoding
B	A special transmission format limited to video signals
C	An error correction method in which the receiving station detects errors and sends a request for retransmission
D	A system used to encrypt command signals to an amateur radio satellite

34. - T9A05

Which of the following increases the resonant frequency of a dipole antenna?

Select	Answer
A	Shortening it
B	Lengthening it
C	Inserting coils in series with radiating wires
D	Adding capacitive loading to the ends of the radiating wires

35. - T9B05

What happens as the frequency of a signal in coaxial cable is increased?

Select	Answer
A	The loss increases
B	The characteristic impedance decreases
C	The loss decreases
D	The characteristic impedance increases

Figure T-3