US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

Select	Answer
A	Post a copy of FCC Part 97.13 in the station
B	All these choices are correct
C	Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
D	Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	On the antenna, opposite the feed point
B	Where the feed lines enter the building
C	At the closest power pole ground electrode
D	In series with each ground lead

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
B	Amateur stations may use the band only during emergencies
C	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
D	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The ITU
B	The FCC
C	The control operator
D	The IEEE

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of the manufacturer of your equipment and the antenna used
B	You must keep a record of the date, time, frequency, power level, and stations worked
C	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
D	You must keep a record of all third-party traffic

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	There is no age limit
B	18 years
C	16 years
D	21 years

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
B	Under no circumstances except for emergencies
C	Under any circumstances in which third party messages are permitted by FCC rules
D	Only when the message is intended for licensed radio amateurs

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Any stations outside the lower 48 states
B	Any caller is welcome to respond
C	Only contest stations
D	Only stations in Germany

9. - G2B01

Which of the following is true concerning access to frequencies?

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

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	Transmitting stations can receive between code characters and elements
C	An operator must activate a manual send/receive switch before and after every transmission
D	Breaking stations send the Morse code prosign “BK”

11. - G2D06

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

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

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	850 Hz
B	170 Hz
C	425 Hz
D	85 Hz

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It enhances propagation on all HF frequencies
B	It disrupts signals on lower frequencies more than those on higher frequencies
C	It disrupts communications via satellite more than direct communications
D	None, because only areas on the night side of the Earth are affected

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency for communications between two specific points
B	The Lowest Usable Frequency during a 24-hour period
C	Lowest Usable Frequency during the past 60 minutes
D	Lowest Usable Frequency for communications to any point outside a 100-mile radius

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Signals are scattered from the magnetosphere, which is not a good reflector
C	Propagation is via ducts in the F region, which absorb most of the energy
D	Only a small part of the signal energy is scattered into the skip zone

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Minimum plate current without exceeding maximum allowable grid current
B	Desired power output without exceeding maximum allowable plate current
C	Highest plate voltage while minimizing grid current
D	Minimum SWR on the antenna

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The attenuated RF output of the transmitter
B	The local oscillator of the transmitter
C	The transmitter balanced mixer output
D	An external RF oscillator

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	On-and-off humming or clicking
B	A CW signal at a nearly pure audio frequency
C	Severely distorted audio
D	A chirpy CW signal

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 MHz to 14.350 MHz
B	14.347 MHz to 14.647 MHz
C	14.344 MHz to 14.347 MHz
D	14.3455 MHz to 14.3485 MHz

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Operating bandwidth may be very limited
B	Short antennas are more likely to cause distortion of transmitted signals
C	Q of the antenna will be very low
D	Harmonic radiation may increase

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Conductance
B	Reluctance
C	Admittance
D	Susceptance

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

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	0.17 ohms
C	5.9 ohms
D	17 ohms

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is formed by a back-biased junction
B	The source is formed by depositing metal on silicon
C	The gate is separated from the channel by a thin insulating layer
D	The source is separated from the drain by a thin insulating layer

25. - G6B11

What is an SMA connector?

Select	Answer
A	A connector designed for serial multiple access signals
B	A type-S to type-M adaptor
C	A type of push-on connector intended for high-voltage applications
D	A small threaded connector suitable for signals up to several GHz

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 6
B	Symbol 7
C	Symbol 11
D	Symbol 1

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low only when both inputs are high
C	Output is low when either or both inputs are high
D	Output is high only when both inputs are high

28. - G7C08

Which parameter affects receiver sensitivity?

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

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency conversion
B	Frequency convolution
C	Frequency modulation
D	Frequency transformation

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The average
B	The arithmetic product
C	The sum and difference
D	The ratio

31. - G8C08

Which of the following statements is true about PSK31?

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

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss increases the accuracy of SWR measured at the input to the line
B	Higher loss reduces SWR measured at the input to the line
C	Transmission line loss does not affect the SWR measurement
D	Higher loss increases SWR measured at the input to the line

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight at right angles to the antenna
B	It has a pair of lobes on one side of the antenna and a single lobe on the other side
C	It is a figure-eight off both ends of the antenna
D	It is a circle (equal radiation in all directions)

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 1.5 dB higher
C	Approximately 3 dB higher
D	Approximately 6 dB higher

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Impedance varies periodically as a function of frequency
B	Gain varies logarithmically as a function of frequency
C	SWR varies periodically as a function of boom length
D	Element length and spacing vary logarithmically along the boom

Figure G7-1