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

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Make sure all circuits that supply power to the tower are locked out and tagged
B	Unground the base of the tower
C	All these choices are correct
D	Notify the electric company that a person will be working on the tower

3. - G1A01

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

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

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	The frequency must be posted on the internet or published in a national periodical
B	All these choices are correct
C	The frequency must be coordinated with the National Beacon Organization
D	No more than one beacon station may transmit in the same band from the same station location

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	200 watts PEP output
D	1200 watts PEP output

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	None, only Amateur Extra class licensees may be accredited
C	Amateur Extra, General, and Technician
D	General and Technician

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	No part
B	Channels 1 through 4
C	Channels 42 through 45
D	Anywhere in the band

8. - G2A08

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

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

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

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. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare signal strengths between the input and output of the repeater
B	Compare vertical and horizontal signal strengths on the input frequency
C	All these choices are correct
D	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors

12. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Transmit a steady carrier until the PACTOR protocol times out and disconnects
C	Send a NAK code
D	Joining an existing contact is not possible, PACTOR connections are limited to two stations

13. - G3A05

What is the solar flux index?

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

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	World-wide propagation during daylight hours
B	Heavy distortion on signals due to photon absorption
C	Poor propagation at any time of day
D	High levels of atmospheric noise or static

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The F region is unstable during daylight hours
B	The E region is unstable during daylight hours
C	The F region absorbs signals at these frequencies during daylight hours
D	The D region absorbs signals at these frequencies during daylight hours

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

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When high precision is desired
B	When measuring the frequency of an oscillator
C	When testing logic circuits
D	When adjusting circuits for maximum or minimum values

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	Overheating of ground straps
B	High RF voltages on the enclosures of station equipment
C	Corrosion of the ground rod
D	A ground loop

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 10 times less powerful
B	It is 20 times more powerful
C	It is 20 times less powerful
D	It is 100 times more powerful

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	The fuel delivery system
C	All these choices are correct
D	The control computers

21. - G5A10

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

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

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It equals the sum of the currents through each branch
B	It equals the average of the branch currents
C	It decreases as more parallel branches are added to the circuit
D	It is the sum of the reciprocal of each individual voltage drop

23. - G5C02

What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

Select	Answer
A	The input voltage is divided by 4
B	Additional resistance must be added in parallel with the secondary to prevent overload
C	The input voltage is multiplied by 4
D	Additional resistance must be added in series with the primary to prevent overload

24. - G6A02

What is an advantage of batteries with low internal resistance?

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

25. - G6B10

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

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

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It acts as a fuse for excess voltage
B	It discharges the filter capacitors when power is removed
C	It eliminates ground loop current
D	It removes shock hazards from the induction coils

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To keep the carrier on frequency
B	To limit the modulation index
C	To cut off the final amplifier during standby periods
D	To eliminate self-oscillations

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier noise figure
B	Input amplifier gain
C	All these choices are correct
D	Demodulator stage bandwidth

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	All these choices are correct
B	Its bandwidth is approximately the same as BPSK31
C	It is sideband sensitive
D	Its encoding provides error correction

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Reactance modulator
B	Mixer
C	Balanced converter
D	Multiplier

31. - G8C02

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

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

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	4:1
B	2:1
C	1:4
D	1:2

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	33 feet
B	16 feet
C	8 feet
D	24 feet

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The maximum voltage standing wave point on a radiating element
B	The direction of maximum radiated field strength from the antenna
C	The magnitude of the maximum vertical angle of radiation
D	The point of maximum current in a radiating antenna element

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They present low impedance on all design frequencies
C	They must be used with an antenna tuner
D	They must be fed with open wire line