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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It cools body tissue
B	It causes the blood count to reach a dangerously low level
C	It heats body tissue
D	It causes radiation poisoning

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To shut off the power supply if too much voltage is produced
C	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
D	To shut down the unit if it becomes too hot

3. - G1A01

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

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

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Regular transmissions offering equipment for sale, if intended for amateur radio use
B	Transmissions to assist with learning the International Morse code
C	Unidentified test transmissions of less than 10 seconds in duration
D	All these choices are correct

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1000 watts PEP output
B	100 watts PEP output
C	1500 watts PEP output
D	2000 watts PEP output

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	Only on the Technician band segments until you have a receipt for the FCC application fee payment
B	On any General or Technician class band segment
C	Only the Technician band segments until your upgrade is posted in the FCC database
D	On any General or Technician class band segment except 30 meters and 60 meters

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only if the 10-meter repeater control operator holds at least a General class license
B	Only during an FCC-declared general state of communications emergency
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Under no circumstances

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
B	Only one sideband and the carrier are transmitted; the other sideband is suppressed
C	Only one sideband is transmitted; the other sideband and carrier are suppressed
D	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Always use multiple sets of phonetics during check-in
B	Transmit the full net roster at the beginning of every session
C	Have a backup frequency in case of interference or poor conditions
D	All these choices are correct

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	I am ready to receive
B	There is interference on the frequency
C	You are sending too fast
D	I am quitting for the day

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

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Approximately 14.074 MHz to 14.077 MHz
B	Anywhere in the CW portion of the band
C	Approximately 14.110 MHz to 14.113 MHz
D	Anywhere in the voice portion of the band

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Rotation of the Sun’s surface layers around its axis
B	Long term oscillations in the upper atmosphere
C	Cyclic variation in Earth’s radiation belts
D	The position of the Moon in its orbit

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Use a network of automated receiving stations on the internet to see where your transmissions are being received
B	All these choices are correct
C	Check the A-index
D	Send a series of dots and listen for echoes

15. - G3C07

What makes HF scatter signals often sound distorted?

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

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Accidental out-of-band operation can be prevented
B	Interference from impulse noise will be eliminated
C	More stations can be accommodated within a given signal passband
D	It may be possible to reduce or eliminate interference from other signals

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

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

18. - G4C06

What is a possible effect of a resonant ground connection?

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

19. - G4D04

What does an S meter measure?

Select	Answer
A	Received signal strength
B	Transmitter power output
C	Impedance
D	Carrier suppression

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
B	The socket is not wired with an RF-shielded power cable
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	Drawing more than 50 watts from this socket could cause the engine to overheat

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	A transformer
C	A Pi-network
D	All these choices are correct

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	1060 watts
B	2120 watts
C	530 watts
D	1500 watts

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	3.0 microfarads
B	0.33 microfarads
C	33.3 microfarads
D	300 microfarads

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Its reactance increases
B	Catastrophic failure is likely
C	Harmonics are generated
D	It becomes capacitive

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	Large values of inductance may be obtained
B	Most of the magnetic field is contained in the core
C	The magnetic properties of the core may be optimized for a specific range of frequencies
D	All these choices are correct

26. - G7A12

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

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

27. - G7B08

How is the efficiency of an RF power amplifier determined?

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

28. - G7C01

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Heterodyning
B	Intermodulation
C	Detection
D	Rolloff

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is intensity, time is vertical
B	Frequency is vertical, signal strength is intensity, time is horizontal
C	Frequency is horizontal, signal strength is vertical, time is intensity
D	Frequency is vertical, signal strength is horizontal, time is intensity

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	There is no relationship between transmission line loss and SWR
B	High SWR increases loss in a lossy transmission line
C	High SWR reduces the relative effect of transmission line loss
D	High SWR makes it difficult to measure transmission line loss

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	Antenna height has no effect on the pattern
C	If the antenna is too high, the pattern becomes unpredictable
D	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated

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 extending and retracting the whip
C	By deploying a capacitance hat
D	By varying its body capacitance

Figure G7-1