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

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	They must be bonded to all buried water and gas lines
C	Bends in ground wires must be made as close as possible to a right angle
D	They must be bonded together with all other grounds

3. - G1A09

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

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

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	200 feet
B	250 feet
C	100 feet
D	50 feet

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	3 kHz
B	5.6 kHz
C	1.8 kHz
D	2.8 kHz

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	Only an appropriate US operator/primary license and a special remote station permit from the FCC
B	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
C	A license from the foreign country and a special remote station permit from the FCC
D	A US operator/primary station license

7. - G1E08

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

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

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “Breaker Breaker”
B	Say your call sign once
C	Say “CQ” followed by the call sign of either station
D	Say “QRZ” several times, followed by your call sign

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan
B	All these choices are correct
C	Listen on the frequency for at least two minutes to be sure it is clear
D	Identify your station by transmitting your call sign at least 3 times

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Automatic keyers, instead of hand keys, are used to send Morse code
B	An operator must activate a manual send/receive switch before and after every transmission
C	Breaking stations send the Morse code prosign “BK”
D	Transmitting stations can receive between code characters and elements

11. - G2D06

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

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

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Call on any frequency in the waterfall except the station’s frequency
B	Always call on the station’s frequency
C	Find a clear frequency during the alternate time slot to the calling station
D	Find a clear frequency during the same time slot as the calling station

13. - G3A14

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

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

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	A slightly delayed echo might be heard
C	The signal might be cancelled causing severe attenuation
D	Signal strength increased by 3 dB

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Short-path
B	Chordal hop
C	Scatter
D	Faraday rotation

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To prevent transient overmodulation
B	To allow time for the amplifier power supply to reach operating level
C	To prevent key clicks on CW
D	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All these choices are correct
B	Receiver
C	Antenna and feed line
D	Transmitter

18. - G4C09

How can the effects of ground loops be minimized?

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

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 1 kHz below the edge of the segment
C	At least 1 kHz above the edge of the segment
D	At least 3 kHz below the edge of the band

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

21. - G5A10

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

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

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	20.6 percent
B	12.2 percent
C	25.9 percent
D	10.9 percent

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

24. - G6A05

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

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

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A low noise figure VHF connector
B	A nickel plated version of the PL-259
C	A small bayonet connector used for data circuits
D	A moisture-resistant RF connector useful to 10 GHz

26. - G7A08

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

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

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Divide the RF output power by the DC input power
C	Add the RF input power to the DC output power
D	Divide the DC input power by the DC output power

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Return loss
B	Q
C	Ultimate rejection
D	Insertion loss

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By using a transceiver’s computer data interface protocol to change frequencies
B	By keying an FM transmitter with a sub-audible tone
C	By changing an oscillator’s frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

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

31. - G8C02

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

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

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:5
B	1:2
C	2:1
D	5:1

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It peaks at about 1/8 wavelength from the end
B	It steadily decreases
C	It steadily increases
D	It is unaffected by the location of the feed point

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

35. - G9D08

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

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