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

2. - T0B04

Which of the following is an important safety precaution to observe when putting up an antenna tower?

Select	Answer
A	Insulate the base of the tower to avoid lightning strikes
B	All these choices are correct
C	Wear a ground strap connected to your wrist at all times
D	Look for and stay clear of any overhead electrical wires

3. - T0C05

Why do exposure limits vary with frequency?

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

4. - T1A03

What do the FCC rules state regarding the use of a phonetic alphabet for station identification in the Amateur Radio Service?

Select	Answer
A	It is encouraged
B	It is required when in contact with foreign stations
C	All these choices are correct
D	It is required when transmitting emergency messages

5. - T1B08

How are US amateurs restricted in segments of bands where the Amateur Radio Service is secondary?

Select	Answer
A	Digital transmissions are not permitted in those segments
B	International communications are not permitted in those segments
C	U.S. amateurs must give foreign amateur stations priority in those segments
D	U.S. amateurs may find non-amateur stations in those segments, and must avoid interfering with them

6. - T1C09

What is the grace period for renewal if an amateur license expires?

Select	Answer
A	Two years
B	Three years
C	Five years
D	Ten years

7. - T1D08

In which of the following circumstances may the control operator of an amateur station receive compensation for operating that station?

Select	Answer
A	When the communication is incidental to classroom instruction at an educational institution
B	All these choices are correct
C	When the communication is related to the sale of amateur equipment by the control operator's employer
D	When the communication is made to obtain emergency information for a local broadcast station

8. - T1E03

Who must designate the station control operator?

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

9. - T1F01

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

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

10. - T2A05

How should you respond to a station calling CQ?

Select	Answer
A	Transmit a signal report followed by your call sign
B	Transmit "CQ" followed by the other station’s call sign
C	Transmit the other station’s call sign followed by your call sign
D	Transmit your call sign followed by the other station’s call sign

11. - T2B01

How is a VHF/UHF transceiver’s “reverse” function used?

Select	Answer
A	To listen on a repeater’s input frequency
B	To increase power output
C	To reduce power output
D	To listen on a repeater’s output frequency

12. - T2C10

What information is contained in the preamble of a formal traffic message?

Select	Answer
A	The address of the intended recipient
B	The telephone number of the addressee
C	Information needed to track the message
D	The email address of the originating station

13. - T3A07

What weather condition might decrease range at microwave frequencies?

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

14. - T3B11

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

Select	Answer
A	150,000 miles per hour
B	150,000 meters per second
C	300,000,000 meters per second
D	300,000,000 miles per hour

15. - T3C08

What causes tropospheric ducting?

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

16. - T4A10

What function is performed with a transceiver and a digital mode hot spot?

Select	Answer
A	FT8 digital communications via AFSK
B	High-speed digital communications for meteor scatter
C	Communication using digital voice or data systems via the internet
D	RTTY encoding and decoding without a computer

17. - T4B03

How is squelch adjusted so that a weak FM signal can be heard?

Select	Answer
A	Enable squelch enhancement
B	Turn on the anti-squelch function
C	Set the squelch threshold so that receiver output audio is on all the time
D	Turn up the audio level until it overcomes the squelch threshold

18. - T5A04

What are the units of electrical resistance?

Select	Answer
A	Coulombs
B	Mhos
C	Siemens
D	Ohms

19. - T5B11

Which decibel value represents a power increase from 20 watts to 200 watts?

Select	Answer
A	12 dB
B	28 dB
C	18 dB
D	10 dB

20. - T5C11

How much current is required to deliver 120 watts at a voltage of 12 volts DC?

Select	Answer
A	10 amperes
B	12 amperes
C	132 amperes
D	0.1 amperes

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. - T6A02

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

Select	Answer
A	Fixed resistor
B	Power resistor
C	Transformer
D	Potentiometer

23. - T6B09

What are the names for the electrodes of a diode?

Select	Answer
A	Source and drain
B	Gate and base
C	Plus and minus
D	Anode and cathode

24. - T6C12

Which of the following is accurately represented in electrical schematics?

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

25. - T6D08

Which of the following is combined with an inductor to make a resonant circuit?

Select	Answer
A	Capacitor
B	Resistor
C	Zener diode
D	Potentiometer

26. - T7A10

What device increases the transmitted output power from a transceiver?

Select	Answer
A	All these choices are correct
B	An impedance network
C	A voltage divider
D	An RF power amplifier

27. - T7B06

Which of the following actions should you take if a neighbor tells you that your station’s transmissions are interfering with their radio or TV reception?

Select	Answer
A	Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel
B	Immediately turn off your transmitter and contact the nearest FCC office for assistance
C	All these choices are correct
D	Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated

28. - T7C09

Which of the following causes failure of coaxial cables?

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

29. - T7D10

What reading indicates that an ohmmeter is connected across a large, discharged capacitor?

Select	Answer
A	Increasing resistance with time
B	Decreasing resistance with time
C	Steady full-scale reading
D	Alternating between open and short circuit

30. - T8A05

Which of the following types of signal has the narrowest bandwidth?

Select	Answer
A	FM voice
B	Slow-scan TV
C	SSB voice
D	CW

31. - T8B05

What is a satellite beacon?

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

32. - T8C06

How is over the air access to IRLP nodes accomplished?

Select	Answer
A	By obtaining a password that is sent via voice to the node
B	By entering the proper internet password
C	By using DTMF signals
D	By using CTCSS tone codes

33. - T8D05

Which of the following is an application of APRS?

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

34. - T9A09

What is the approximate length, in inches, of a half-wavelength 6 meter dipole antenna?

Select	Answer
A	50
B	236
C	6
D	112

35. - T9B11

Which of the following types of feed line has the lowest loss at VHF and UHF?

Select	Answer
A	75-ohm flexible coax
B	50-ohm flexible coax
C	Air-insulated hardline
D	Multi-conductor unbalanced cable