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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The total RF exposure averaged over a certain period
B	The average amount of power developed by the transmitter over a specific 24-hour period
C	The total time of the exposure
D	The average time it takes RF radiation to have any long-term effect on the body

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	Lightning grounds must be connected to all ungrounded wiring
B	Bends in ground wires must be made as close as possible to a right angle
C	They must be bonded to all buried water and gas lines
D	They must be bonded together with all other grounds

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	17 meters
B	30 meters
C	12 meters
D	160 meters

4. - G1B07

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

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

5. - G1C09

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

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Only those of the remote station’s country
B	Only those of the FCC
C	Those of the remote station’s country and the FCC’s third-party regulations
D	Those of both the remote station’s country and the FCC

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	1500 watts
B	10 watts
C	100 watts
D	100 milliwatts

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

Select	Answer
A	Suppressed sideband
B	Double sideband
C	Upper sideband
D	Lower sideband

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	QSOs in progress have priority
B	Nets have priority
C	Except during emergencies, no amateur station has priority access to any frequency
D	Contest operations should yield to non-contest use of frequencies

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Operating full break-in
B	Closing station now
C	No US stations should call
D	Listening only for a specific station or stations

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
C	A map that shows accurate land masses
D	A map that shows true bearings and distances from a specific location

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	An amateur radio wireless network to send and receive email on the internet
B	All of the above
C	A form of Packet Radio
D	A wireless network capable of both VHF and HF band operation

13. - G3A05

What is the solar flux index?

Select	Answer
A	A measure of solar radiation with a wavelength of 10.7 centimeters
B	A count of sunspots that is adjusted for solar emissions
C	Another name for the American sunspot number
D	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Solar radiation and ionospheric disturbances
B	All these choices are correct
C	Time of day and season
D	Path distance and location

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	Ground waves are absorbing much of the signal
D	The ionospheric region involved is unstable

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced peak
C	A pronounced dip
D	No change will be observed

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Desensitization which can cause intermodulation products which interfere with impedance readings
B	Generation of harmonics which interfere with frequency readings
C	Received power that interferes with SWR readings
D	All these choices are correct

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	Solder flux will prevent a low conductivity connection
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	A soldered joint will likely be destroyed by the heat of a lightning strike
D	All these choices are correct

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	All these choices are correct
B	Distorted speech
C	Excessive background noise
D	Excess intermodulation products

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To increase the “Q” of the antenna
B	To reduce the chance of damage if the antenna should strike an object
C	To narrow the operating bandwidth of the antenna
D	To reduce RF voltage discharge from the tip of the antenna while transmitting

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	84.8 volts
B	240.0 volts
C	339.4 volts
D	169.7 volts

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To improve the coupling between the primary and secondary
B	To accommodate the higher current of the primary
C	To prevent parasitic oscillations due to resistive losses in the primary
D	To ensure that the volume of the primary winding is equal to the volume of the secondary winding

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To decrease plate resistance
B	To increase the control grid resistance
C	To reduce grid-to-plate capacitance
D	To increase efficiency

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	BNC
B	RCA Phono
C	PL-259
D	Type N

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 7
B	Symbol 1
C	Symbol 6
D	Symbol 4

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	SSB
B	All these choices are correct
C	FM
D	AM

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	RF amplifier
B	Filter
C	Carrier oscillator
D	IF amplifier

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	The transmitter’s carrier is properly suppressed
B	Signal distortion caused by insufficient collector current
C	The transmitter’s automatic level control (ALC) is properly adjusted
D	Signal distortion caused by excessive drive or speech levels

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	5 kHz
B	60 kHz
C	416.7 Hz
D	101.75 Hz

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Insufficient modulation
B	Overmodulation
C	Backscatter propagation
D	Long path propagation

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 1,000 feet
B	Decibels per 100 feet
C	Ohms per 100 feet
D	Ohms per 1,000 feet

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	42 feet
B	132 feet
C	263 feet
D	84 feet

34. - G9C07

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

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

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying its body capacitance
B	By deploying a capacitance hat
C	By varying the base loading inductance
D	By extending and retracting the whip

Figure G7-1