US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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1. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	20 meters
B	12 meters
C	30 meters
D	160 meters

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	When it is transmitted on frequencies above 1215 MHz
B	At any time, as long as it produces no spurious emissions
C	When it is unintentionally transmitted from the background at the transmitter
D	When it is an incidental part of a manned space craft retransmission

3. - G1C09

What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

Select	Answer
A	300 baud
B	56 kilobaud
C	19.6 kilobaud
D	1200 baud

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	180 days
B	365 days
C	For as long as your current license is valid
D	30 days

5. - G1E13

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
B	Anywhere in the 1.25-meter or shorter wavelength bands, and in specified segments of the 80-meter through 2-meter bands
C	Only in the non-phone Extra Class segments of the bands
D	On any band segment where digital operation is permitted

6. - G2A09

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

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

7. - G2B04

When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 to 50 Hz
B	150 to 500 Hz
C	1 to 3 kHz
D	3 to 6 kHz

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	I am troubled by static
B	Zero beat my signal
C	Send more slowly
D	Stop sending

9. - G2D07

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

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

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Insufficient modulation
B	Overmodulation
C	Long Path propagation
D	Backscatter propagation

11. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from solar flares to affect radio propagation on the Earth?

Select	Answer
A	8 minutes
B	28 days
C	20 to 40 hours
D	1 to 2 hours

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Double hop propagation along the path is more common
B	Propagation over the path on all HF frequencies is enhanced
C	No HF radio frequency will support ordinary sky-wave communications over the path
D	HF communications over the path are enhanced

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
B	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
C	The short path azimuth of a distant station
D	The long path azimuth of a distant station

14. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To balance the transmitter audio frequency response
C	To reduce harmonic radiation
D	To reduce distortion due to excessive drive

15. - G4B12

What problem can occur when making measurements on an antenna system with an antenna analyzer?

Select	Answer
A	Strong signals from nearby transmitters can affect the accuracy of measurements
B	Connecting the analyzer to an antenna can cause it to absorb harmonics
C	Permanent damage to the analyzer may occur if it is operated into a high SWR
D	The analyzer can be damaged if measurements outside the ham bands are attempted

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby 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

17. - G4D04

What does an S meter measure?

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

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The wire gauge of the DC power line to the transceiver
B	The antenna system
C	"Picket Fencing" signal variation
D	FCC rules limiting mobile output power on the 75-meter band

19. - G5A07

What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?

Select	Answer
A	The electrical load is shorted
B	No current can flow through the circuit
C	The source delivers minimum power to the load
D	The source can deliver maximum power to the load

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	10.9 percent
B	25.9 percent
C	20.5 percent
D	12.2 percent

21. - G5C18

What is the value in microfarads of a 4700 nanofarad (nF) capacitor?

Select	Answer
A	4.7 microfarads
B	0.47 microfarads
C	47,000 microfarads
D	47 microfarads

22. - G6A06

Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?

Select	Answer
A	Lower inductance
B	Longer switching times
C	Higher breakdown voltage
D	Lower capacitance

23. - G6B01

Which of the following is an analog integrated circuit?

Select	Answer
A	Frequency Counter
B	NAND Gate
C	Linear voltage regulator
D	Microprocessor

24. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A steady DC voltage
B	A series of DC pulses at the same frequency as the AC input
C	A sine wave at half the frequency of the AC input
D	A series of DC pulses at twice the frequency of the AC input

25. - G7B07

What are the basic components of virtually all sine wave oscillators?

Select	Answer
A	A filter and an amplifier operating in a feedback loop
B	An amplifier and a divider
C	A frequency multiplier and a mixer
D	A circulator and a filter operating in a feed-forward loop

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Phase inverter
B	Discriminator
C	Product detector
D	Mixer

27. - G8A08

Which of the following is an effect of overmodulation?

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

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	101.75 Hz
B	416.7 Hz
C	5 kHz
D	60 kHz

29. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters make the signal stronger
B	Varicode Error Correction is used to ensure accurate message reception
C	Higher power is needed as compared to RTTY for similar error rates
D	Upper case letters use longer Varicode signals and thus slow down transmission

30. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 1000 feet
B	Decibels per 100 feet
C	Ohms per 1000 feet
D	Ohms per 100 feet

31. - G9B10

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

Select	Answer
A	32 feet
B	8 feet
C	24 feet
D	16 feet

32. - G9C06

What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?

Select	Answer
A	The driven element must be fed with a balun transformer
B	There must be an open circuit in the driven element at the point opposite the feed point
C	The reflector element must be approximately 5 percent shorter than the driven element
D	The reflector element must be approximately 5 percent longer than the driven element

33. - G9D03

At what height above ground is an NVIS antenna typically installed?

Select	Answer
A	As close to 1/2 wavelength as possible
B	Between 1/10 and 1/4 wavelength
C	As close to one wavelength as possible
D	Height is not critical as long as it is significantly more than 1/2 wavelength

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should not be installed in a wet area
B	It should not be installed higher than you can reach
C	It should be installed such that it is protected against unauthorized access
D	It should limited to 10 feet in height

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	RF exposure limits of the human body
B	Electrical safety inside the ham shack
C	Acceptable bandwidth limits
D	Acceptable modulation limits