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. - G1A05

Which of the following frequencies is in the General Class portion of the 40-meter band?

Select	Answer
A	40.200 MHz
B	7.250 MHz
C	7.500 MHz
D	40.500 MHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only when the information is of a routine, personal nature
B	Only with Special Temporary Authorization from the FCC
C	To control a space station
D	During a declared communications emergency

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	Only on the Technician band segments until your license arrives in the mail
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

5. - G1E09

What language must be used when identifying your station if you are using a language other than English in making a contact using phone emission?

Select	Answer
A	English only
B	Any language recognized by the United Nations
C	The language being used for the contact
D	English, Spanish, French, or German

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	The caller is listening for a station in Germany
B	A distress call
C	The caller is looking for any station outside their own country
D	A general call for any station

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Change to a different frequency
B	Continue your communication because you were on the frequency first
C	Immediately cease all transmissions
D	Acknowledge the station in distress and determine what assistance may be needed

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	100 percent copy
C	Key clicks
D	Report was read from an S meter rather than estimated

9. - G2D11

Which HF antenna would be the best to use for minimizing interference?

Select	Answer
A	An omnidirectional antenna
B	A directional antenna
C	A quarter-wave vertical antenna
D	An isotropic antenna

10. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may have selected the wrong baud rate
B	The mark and space frequencies may be reversed
C	You may be listening on the wrong sideband
D	All of these choices are correct

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
B	A zero sunspot number indicate radio propagation is not possible on any band
C	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
D	All of these choices are correct.

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Listen for signals from an international beacon in the frequency range you plan to use
B	Send a series of dots on the band and listen for echoes from your signal
C	Check the strength of signals in the MF AM broadcast band
D	Check the strength of TV signals from Western Europe

13. - G3C05

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

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

14. - G4A05

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

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

15. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Input impedance is much lower
B	An oscilloscope uses less power
C	Complex impedances can be easily measured
D	Complex waveforms can be measured

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Reverse-biased diode
B	Bypass inductor
C	Bypass capacitor
D	Forward-biased diode

17. - 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 20 times less powerful
B	It is 10 times less powerful
C	It is 20 times more powerful
D	It is 100 times more powerful

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the alternator or generator using heavy gauge wire
B	To the battery using heavy gauge wire
C	To the alternator or generator using resistor wire
D	To the battery using resistor wire

19. - G5A02

What is reactance?

Select	Answer
A	A large spark produced at switch contacts when an inductor is de-energized
B	A property of ideal resistors in AC circuits
C	Opposition to the flow of alternating current caused by capacitance or inductance
D	Opposition to the flow of direct current caused by resistance

20. - G5B06

What is the output PEP from a transmitter if an oscilloscope measures 200 volts peak-to-peak across a 50 ohm dummy load connected to the transmitter output?

Select	Answer
A	100 watts
B	400 watts
C	1.4 watts
D	353.5 watts

21. - G5C18

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

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

22. - G6A11

Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?

Select	Answer
A	A varistor
B	A bipolar transistor
C	A field effect transistor
D	A tunnel diode

23. - G6B11

What is a microprocessor?

Select	Answer
A	A microwave detector, amplifier, and local oscillator on a single integrated circuit
B	A low power analog signal processor used as a microwave detector
C	A computer on a single integrated circuit
D	A low voltage amplifier used in a microwave transmitter modulator stage

24. - G7A07

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

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

25. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	All of these choices are correct
C	SSB
D	CW

26. - G7C06

What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

Select	Answer
A	Substantially higher
B	Twice the transmission line impedance
C	About the same
D	Substantially lower

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Amplitude modulation
B	Frequency shift keying
C	Phase modulation
D	Frequency modulation

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Synthesizing
B	Heterodyning
C	Cancellation
D	Phase inverting

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By using the varicode character set
B	By transmitting redundant information with the data
C	By controlling transmitter output power for optimum signal strength
D	By using a parity bit with each character

30. - G9A06

In what units is RF feed line loss usually expressed?

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

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It decreases
B	It reaches a maximum at an angle of 45 degrees
C	It stays the same
D	It increases

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

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

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
B	High forward gain
C	All of these choices are correct
D	High vertical angle radiation for working stations within a radius of a few hundred kilometers

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	Its duty cycle
B	Its frequency
C	Its power density
D	All of these choices are correct

35. - G0B06

Why must the metal enclosure of every item of station equipment be grounded?

Select	Answer
A	It ensures that hazardous voltages cannot appear on the chassis
B	It prevents a blown fuse in the event of an internal short circuit
C	It ensures that the neutral wire is grounded
D	It prevents signal overload