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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An SWR meter with a peak-reading function
B	An oscilloscope with a high-stability crystal marker generator
C	A calibrated field strength meter with a calibrated antenna
D	A receiver with digital signal processing (DSP) noise reduction

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Electrical safety of the station
B	Acceptable bandwidth limits
C	RF exposure limits of the human body
D	Acceptable modulation limits

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

Select	Answer
A	80 meters, 40 meters, 20 meters, and 15 meters
B	160 meters, 60 meters, 15 meters, and 12 meters
C	60 meters, 30 meters, 17 meters, and 12 meters
D	80 meters, 20 meters, 15 meters, and 10 meters

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Automatic identification of repeaters
B	All these choices are correct
C	Transmission of bulletins of general interest to amateur radio licensees
D	Observation of propagation and reception

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	ERP of 100 watts PEP with respect to an isotropic antenna
B	1500 watts PEP
C	ERP of 100 watts PEP with respect to a dipole
D	10 watts RMS

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Technician only
B	General and Technician
C	None, only Amateur Extra class licensees may be accredited
D	Amateur Extra, General, and Technician

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
B	Only during an FCC-declared general state of communications emergency
C	Only if the 10-meter repeater control operator holds at least a General class license
D	Under no circumstances

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	RF clipping level
B	Antenna inductance or capacitance
C	Transmit audio or microphone gain
D	Attenuator level

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 2 hours per month
B	No more than 1 hour per month
C	No more than 1 hour per week
D	No more than 2 hours per week

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	We have already confirmed the contact
B	We have worked before
C	I have received and understood
D	Send slower

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	180 degrees from the station’s short-path heading
B	Toward the rising sun
C	Along the gray line
D	Toward the north

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Respond when the station broadcasts its SSID
B	Send an email to the system control operator
C	Transmit a connect message on the station’s published frequency
D	Send QRL in Morse code

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

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	A slightly delayed echo might be heard
B	Signal strength increased by 3 dB
C	Periodic fading approximately every 10 seconds
D	The signal might be cancelled causing severe attenuation

15. - G3C06

What is a characteristic of HF scatter?

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

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To eliminate receiver interference from impulse noise sources
B	To remove interfering splatter generated by signals on adjacent frequencies
C	To restrict the transmitter voice bandwidth
D	To reduce interference from carriers in the receiver passband

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Complex waveforms can be measured
B	An oscilloscope uses less power
C	Complex impedances can be easily measured
D	Greater precision

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	Flat braid rather than round wire has been used for the ground wire
B	The ground rod is resonant
C	Insulated wire has been used for the ground wire
D	The ground wire has high impedance on that frequency

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 3 kHz above the edge of the band
B	At least 3 kHz below the edge of the band
C	At least 1 kHz above the edge of the segment
D	At least 1 kHz below the edge of the segment

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Operating bandwidth may be very limited
B	Harmonic radiation may increase
C	Short antennas are more likely to cause distortion of transmitted signals
D	Q of the antenna will be very low

21. - G5A08

What is impedance?

Select	Answer
A	The ratio of current to voltage
B	The product of current and reactance
C	The product of current and voltage
D	The ratio of voltage to current

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	692 volts
B	173 volts
C	346 volts
D	245 volts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	0.17 ohms
C	5.9 ohms
D	17 ohms

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.3 volts
B	1.0 volts
C	0.1 volt
D	0.7 volts

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	Ferrites expel magnetic fields
B	It converts common-mode current to differential mode current
C	By creating an impedance in the current’s path
D	By creating an out-of-phase current to cancel the common-mode current

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Inherently more stable
B	Faster switching time makes higher output voltage possible
C	Fewer circuit components are required
D	High-frequency operation allows the use of smaller components

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	Less than 50%
B	50%
C	100%
D	More than 50% but less than 100%

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in an FM receiver to filter out unwanted sidebands
B	Used in a single sideband receiver to extract the modulated signal
C	Used in test gear to detect spurious mixing products
D	Used in transmitter to perform frequency multiplication

29. - G8A14

What is link margin?

Select	Answer
A	Receiver sensitivity plus 3 dB
B	Transmit power minus receiver sensitivity
C	The opposite of fade margin
D	The difference between received power level and minimum required signal level at the input to the receiver

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is half the symbol rate
B	Lower symbol rates require wider bandwidth
C	Symbol rate and bandwidth are not related
D	Higher symbol rates require wider bandwidth

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	PSK31
B	MFSK16
C	WSPR
D	SSB-SC

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Operating an antenna at its resonant frequency
B	A difference between feed line impedance and antenna feed point impedance
C	Feeding the antenna with unbalanced feed line
D	Using more transmitter power than the antenna can handle

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	33 feet
C	16 feet
D	8 feet

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1/4 wavelength
B	1 wavelength
C	1/2 wavelength
D	3/4 wavelength

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Gain varies logarithmically as a function of frequency
B	Element length and spacing vary logarithmically along the boom
C	Impedance varies periodically as a function of frequency
D	SWR varies periodically as a function of boom length