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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	All these choices are correct
B	Use an antenna with a higher front-to-back ratio
C	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
D	Change to a non-polarized antenna with higher gain

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	30 amperes
B	15 amperes
C	20 amperes
D	25 amperes

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	80 meters, 20 meters, 15 meters, and 10 meters
C	160 meters, 60 meters, 15 meters, and 12 meters
D	60 meters, 30 meters, 17 meters, and 12 meters

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They may be used if they do not obscure the meaning of a message
B	Only “Q” signals are permitted
C	They are limited to those expressly listed in Part 97 of the FCC rules
D	They are not permitted

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of Technician class
B	At least three Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of Technician class or higher
D	At least two Volunteer Examiners of General class or higher

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 2
B	Region 1
C	Region 3
D	Region 4

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	The received signal is more natural sounding
B	It allows “hands free” operation
C	It provides more power output
D	It occupies less bandwidth

9. - G2B11

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

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

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 10 wpm
B	At the standard calling speed of 5 wpm
C	The fastest speed at which you are comfortable copying, but no faster than the CQ
D	The fastest speed at which you are comfortable copying, but no slower than the CQ

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To coordinate repeaters for efficient and orderly spectrum usage
B	To encourage amateur radio operators to self-regulate and comply with the rules
C	To provide emergency and public safety communications
D	To conduct efficient and orderly amateur licensing examinations

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	LSB
B	DSB
C	USB
D	CW

13. - G3A12

What does the K-index measure?

Select	Answer
A	The short-term stability of the Sun’s magnetic field
B	The relative position of sunspots on the surface of the Sun
C	The short-term stability of Earth’s geomagnetic field
D	The solar radio flux at Boulder, Colorado

14. - G3B01

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

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

15. - G3C03

Why is skip propagation via the F2 region longer than that via the other ionospheric regions?

Select	Answer
A	Because of the Doppler effect
B	Because it is the densest
C	Because of temperature inversions
D	Because it is the highest

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To balance the transmitter audio frequency response
B	To prevent excessive drive
C	To increase overall efficiency
D	To reduce harmonic radiation

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of suppression of the carrier and undesired sideband for SSB
B	Linearity
C	Percentage of carrier phase shift
D	Percentage of frequency modulation

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Using a balun to feed an unbalanced antenna
B	Arcing at a poor electrical connection
C	Lack of rectification of the transmitter’s signal in power conductors
D	Not using a balun or line isolator to feed balanced antennas

19. - G4D10

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

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

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The battery charging system
B	All these choices are correct
C	The fuel delivery system
D	The control computers

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Resistance is cancelled
B	Current and voltage are equal
C	Inductive reactance and capacitive reactance cancel
D	The circuit radiates all its energy in the form of radio waves

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 9 dB
B	Approximately 2 dB
C	Approximately 3 dB
D	Approximately 6 dB

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	0.30 henries
B	30 millihenries
C	3.3 millihenries
D	3.3 henries

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Control grid
C	Suppressor grid
D	Screen grid

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	Only one diode is required
B	The output voltage is two times the peak input voltage
C	The ripple frequency is twice that of a full-wave rectifier
D	More current can be drawn from the half-wave rectifier

27. - G7B10

Which of the following describes a linear amplifier?

Select	Answer
A	A Class C high efficiency amplifier
B	An amplifier used as a frequency multiplier
C	Any RF power amplifier used in conjunction with an amateur transceiver
D	An amplifier in which the output preserves the input waveform

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Insertion loss
B	Ultimate rejection
C	Rolloff
D	Notch depth

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using quasi-parallel to serial conversion to reduce bandwidth
B	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits
C	Modulation using quadra-pole sideband keying to generate spread spectrum signals
D	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Even-order
B	Intercept point
C	Second harmonics
D	Odd-order

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	Dot and dash
B	Mark and space
C	On and off
D	High and low

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR reduces the relative effect of transmission line loss
B	High SWR increases loss in a lossy transmission line
C	There is no relationship between transmission line loss and SWR
D	High SWR makes it difficult to measure transmission line loss

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It produces only vertically polarized radiation
B	It is more effective on the lower HF bands than on the higher bands
C	Station equipment may carry significant RF current
D	It must be longer than 1 wavelength

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The number of directors versus the number of reflectors
C	The relative position of the driven element with respect to the reflectors and directors
D	The power radiated in the major lobe compared to that in the opposite direction

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A horizontal dipole placed at approximately 1/2 wavelength above the ground
B	A vertical dipole placed at approximately 1/2 wavelength above the ground
C	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
D	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground