US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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1. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	Take action to prevent human exposure to the excessive RF fields
B	Secure written permission from your neighbors to operate above the controlled MPE limits
C	File an Environmental Impact Statement (EIS-97) with the FCC
D	All these choices are correct

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To shut down the unit if it becomes too hot
C	To shut off the power supply if too much voltage is produced
D	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	12 meters
B	60 meters
C	30 meters
D	11 meters

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be coordinated with the National Beacon Organization
B	The frequency must be posted on the internet or published in a national periodical
C	No more than one beacon station may transmit in the same band from the same station location
D	All these choices are correct

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	19.6 kilobaud
B	1200 baud
C	300 baud
D	56 kilobaud

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must hold an FCC granted amateur radio license of General class or above
B	The person must be a resident of the US for a minimum of 5 years
C	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
D	The person’s home citizenship must be in ITU region 2

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When a station is transmitting spread spectrum emissions
B	When operating within one mile of an FCC Monitoring Station
C	All these choices are correct
D	When using a band where the Amateur Service is secondary

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband and the carrier are transmitted; the other sideband is suppressed
B	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
C	Only one sideband is transmitted; the other sideband and carrier are suppressed
D	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	5 Hz to 50 Hz
C	1 kHz to 3 kHz
D	3 kHz to 6 kHz

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Sending without error
B	Operating split to avoid interference on frequency
C	Matching the transmit frequency to the frequency of a received signal
D	Matching the speed of the transmitting station

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Alpha, Bravo, Charlie, Delta
B	America, Boston, Canada, Denmark
C	Able, Baker, Charlie, Dog
D	Adam, Boy, Charles, David

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the voice portion of the band
B	Approximately 14.110 MHz to 14.113 MHz
C	Approximately 14.074 MHz to 14.077 MHz
D	Anywhere in the CW portion of the band

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is improved
B	HF communication is disturbed
C	VHF/UHF ducting is improved
D	VHF/UHF ducting is disturbed

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency during a 24-hour period
B	The Maximum Usable Frequency during a 24-hour period
C	The Maximum Usable Frequency for communications between two points
D	The Minimum Usable Frequency for communications between two points

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	There are very large, sudden swings in signal strength
B	Scatter propagation occurs only at night
C	Phone signals have high intelligibility
D	Signals have a fluttering sound

16. - G4A12

Which of the following is a common use of the dual-VFO feature on a transceiver?

Select	Answer
A	To allow transmitting on two frequencies at once
B	To improve frequency accuracy by allowing variable frequency output (VFO) operation
C	To transmit on one frequency and listen on another
D	To permit full duplex operation -- that is, transmitting and receiving at the same time

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When adjusting circuits for maximum or minimum values
B	When testing logic circuits
C	When measuring the frequency of an oscillator
D	When high precision is desired

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Place a ferrite choke on the cable
B	Connect the center conductor to the shield of all cables to short circuit the RFI signal
C	Ground the center conductor of the audio cable causing the interference
D	Add an additional insulating jacket to the cable

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	6 dB
B	18 dB
C	12 dB
D	15 dB

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	1.38 VDC
B	0.5 VDC
C	0.2 VDC
D	0.02 VDC

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A length of transmission line
B	A transformer
C	A Pi-network
D	All these choices are correct

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	353.5 watts
B	100 watts
C	1.4 watts
D	400 watts

23. - G5C01

What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?

Select	Answer
A	Capacitive coupling
B	Mutual capacitance
C	Displacement current coupling
D	Mutual inductance

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor could overheat
B	The resistor’s tolerance value would not be adequate
C	The resistor’s internal capacitance would detune the circuit
D	The resistor’s inductance could make circuit performance unpredictable

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Forward biased
B	In the tunnel-effect region
C	At the Zener voltage
D	Reverse biased

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A steady DC voltage
B	A sine wave at half the frequency of the AC input
C	A series of DC pulses at the same frequency as the AC input
D	A series of DC pulses at twice the frequency of the AC input

27. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	An array of operational amplifiers used for tri-state arithmetic operations
C	An analog mixer
D	A digital mixer

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Demodulator stage bandwidth
B	All these choices are correct
C	Input amplifier gain
D	Input amplifier noise figure

29. - G8A13

What is a link budget?

Select	Answer
A	The financial costs associated with operating a radio link
B	The sum of transmit power and antenna gains minus system losses as seen at the receiver
C	The sum of antenna gains minus system losses
D	The difference between transmit power and receiver sensitivity

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	2F1-F2
B	5F1-3F2
C	3F1-F2
D	All these choices are correct

31. - G8C15

What does an FT8 signal report of +3 mean?

Select	Answer
A	The signal is 3 times the noise level of an equivalent SSB signal
B	The signal is S3 (weak signals)
C	The signal is 3 dB over S9
D	The signal-to-noise ratio is equivalent to +3dB in a 2.5 kHz bandwidth

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	2:1
B	1:4
C	1:2
D	4:1

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	24 feet
B	8 feet
C	16 feet
D	33 feet

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	All these choices are correct
B	It is useful for matching multiband antennas
C	It does not require the driven element to be insulated from the boom
D	It does not require any inductors or capacitors

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 300 ohms
B	Very low
C	Very high
D	Approximately 50 ohms