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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	Only stations transmitting more than 500 watts PEP
B	All commercial stations; amateur radio stations are exempt
C	Only stations with antennas lower than one wavelength above the ground
D	All stations with a time-averaged transmission of more than one milliwatt

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 20
B	AWG number 12
C	AWG number 16
D	AWG number 8

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

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

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	20 watts PEP output
B	200 watts PEP output
C	10 watts PEP output
D	100 watts PEP output

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	19.6 kilobaud
C	56 kilobaud
D	1200 baud

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	General and Technician
B	Amateur Extra, General, and Technician
C	None, only Amateur Extra class licensees may be accredited
D	Technician only

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

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	It is commonly accepted amateur practice
B	Lower sideband is the only sideband legal on these frequency bands
C	Because it is fully compatible with an AM detector
D	Lower sideband is more efficient than upper sideband at these frequencies

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. - G2C08

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

Select	Answer
A	SK
B	BK
C	KN
D	AR

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To follow standard radiogram structure
B	To allow each station to operate according to conditions
C	To be sure the contact will count for award programs
D	To allow each station to calibrate their frequency display

12. - G2E09

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

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

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. - G3B02

What factors affect the MUF?

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

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

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

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	A field strength meter
B	A wavemeter
C	A sidetone monitor
D	An oscilloscope

18. - G4C02

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

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

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Increase the apparent loudness of transmitted voice signals
B	Increase transmitter bass response for more natural-sounding SSB signals
C	Prevent distortion of voice signals
D	Decrease high-frequency voice output to prevent out-of-band operation

20. - G4E02

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

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

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B02

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

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

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	360 volts
B	120 volts
C	25.5 volts
D	40 volts

24. - G6A02

What is an advantage of batteries with low internal resistance?

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 11
C	Symbol 1
D	Symbol 7

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the counter
B	The inductance and capacitance in the tank circuit
C	The number of stages in the divider
D	The time delay of the lag circuit

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize transmitter power output
B	To reduce power supply ripple
C	To minimize radiation resistance
D	To present the desired impedance to the transmitter and feed line

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient bandwidth
B	Insufficient audio
C	Excessive bandwidth
D	Frequency drift

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

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

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Error correction is used to ensure accurate message reception
B	Higher power is needed as compared to RTTY for similar error rates
C	Upper case letters are sent with more power
D	Upper case letters use longer Varicode bit sequences and thus slow down transmission

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Using more transmitter power than the antenna can handle
B	Feeding the antenna with unbalanced feed line
C	Operating an antenna at its resonant frequency
D	A difference between feed line impedance and antenna feed point impedance

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	As high as possible above the ground
B	At the center of the antenna
C	On the surface or buried a few inches below the ground
D	Parallel to the antenna element

34. - G9C07

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

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

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

Select	Answer
A	Electrically small loops are omnidirectional
B	Broadside and in the plane of the loop
C	Broadside to the loop
D	In the plane of the loop

Figure G7-1