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

Anonymous User

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

Logging in (or registering) will help the system to select questions that you need to focus on.

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

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	Next to the closest power pole
B	Parallel to the water supply line
C	As close to the station equipment as possible
D	Outside the building

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	18155 kHz
B	21300 kHz
C	14250 kHz
D	24900 kHz

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	21.08 MHz to 21.09 MHz
B	On any frequency if power is less than 1 watt
C	On any frequency if transmissions are in Morse code
D	28.20 MHz to 28.30 MHz

5. - G1C10

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

Select	Answer
A	300 baud
B	56 kilobaud
C	19.6 kilobaud
D	1200 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 General class or higher
D	At least two Volunteer Examiners of Technician 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 1
B	Region 3
C	Region 4
D	Region 2

8. - G2A10

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

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Acknowledge the station in distress and determine what assistance may be needed
C	Immediately cease all transmissions
D	Inform your local emergency coordinator

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	AR
C	KN
D	BK

11. - G2D06

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

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

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Failure to establish a connection between stations
B	Frequent retries or timeouts
C	Long pauses in message transmission
D	All these choices are correct

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Creates auroras that can reflect VHF signals
B	Improve HF long path propagation
C	Increases signal strength for HF signals passing through the polar regions
D	Reduce long delayed echoes

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted and trapped in the ionosphere to circle Earth
B	They are refracted back to Earth
C	They pass through the ionosphere
D	They are amplified by interaction with the ionosphere

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Energy is scattered into the skip zone through several different paths
B	The E region is not present
C	The ionospheric region involved is unstable
D	Ground waves are absorbing much of the signal

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	The ALC action distorts the signal
B	ALC will invert the modulation of the AFSK mode
C	When using digital modes, too much ALC activity can cause the transmitter to overheat
D	All these choices are correct

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the frequency response
B	It decreases the loading on circuits being measured
C	It improves the resolution of the readings
D	It allows for higher voltages to be safely measured

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Connect the AC neutral conductor to the ground wire
B	Avoid using lock washers and star washers when making ground connections
C	Bond equipment enclosures together
D	Connect all ground conductors in series

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 MHz to 7.184 MHz
B	7.1765 MHz to 7.1795 MHz
C	7.178 MHz to 7.181 MHz
D	7.175 MHz to 7.178 MHz

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent overload by regulating the charging voltage
B	To prevent damage to the battery due to excessive voltage at high illumination levels
C	To limit the current flowing from the panel to a safe value
D	To prevent discharge of the battery through the panel during times of low or no illumination

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	3200 watts
B	400 watts
C	0.5 watts
D	200 watts

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	576.9 nanofarads
B	3,583 picofarads
C	10.750 nanofarads
D	1,733 picofarads

24. - G6A02

What is an advantage of batteries with low internal resistance?

Select	Answer
A	Rapid recharge
B	High voltage
C	Long life
D	High discharge current

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	50 MHz
B	500 MHz
C	40 GHz
D	4 GHz

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Full-wave bridge
B	Full-wave
C	Half-wave
D	Synchronous

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class B
B	Class C
C	Class AB
D	Class A

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. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The carrier frequency that contains the signal
B	The bandwidth of the modulated signal
C	Spurious signals that envelop nearby frequencies
D	The waveform created by connecting the peak values of the modulated signal

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	5 kHz
B	3 kHz
C	16 kHz
D	8 kHz

31. - G8C11

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

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

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	75 ohms
B	100 ohms
C	450 ohms
D	50 ohms

33. - G9B01

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

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

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBd is 1.25 dBd higher
B	Gain in dBi is 2.15 dB lower
C	Gain in dBi is 2.15 dB higher
D	Gain in dBd is 1.25 dBd lower

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It narrows the main lobe in elevation
B	It allows quick selection of vertical or horizontal polarization
C	It narrows the main lobe in azimuth
D	It allows simultaneous vertical and horizontal polarization