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. - G1A08

Which of the following frequencies is within the General Class portion of the 80-meter band?

Select	Answer
A	2560 kHz
B	3650 kHz
C	3560 kHz
D	1855 kHz

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. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person's home citizenship must be in ITU region 2
B	The person must be a resident of the U.S. for a minimum of 5 years
C	The person must hold an FCC granted Amateur Radio license of General Class or above
D	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Any country which is not a member of the International Amateur Radio Union (IARU)
B	Every foreign country, unless there is a third party agreement in effect with that country
C	Countries in ITU Region 2
D	Countries in ITU Region 1

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

Select	Answer
A	Upper sideband
B	Vestigial sideband
C	Double sideband
D	Lower sideband

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan for the operating mode you intend to use
B	Check to see if the channel is assigned to another station
C	All of these choices are correct
D	Identify your station by transmitting your call sign at least 3 times

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	I acknowledge receipt
B	Send slower
C	We have already confirmed by card
D	We have worked before

9. - G2D06

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

Select	Answer
A	Toward the north
B	180 degrees from its short-path heading
C	Toward the rising Sun
D	Along the gray line

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.000 - 14.050 MHz
B	14.070 - 14.100 MHz
C	14.150 - 14.225 MHz
D	14.275 - 14.350 MHz

11. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	Only at the maximum point of the solar cycle
B	At any point in the solar cycle
C	Only at the minimum point of the solar cycle
D	At the summer solstice

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

Select	Answer
A	They pass through the ionosphere
B	They are amplified by interaction with the ionosphere
C	They are bent back to the Earth
D	They are bent and trapped in the ionosphere to circle the Earth

13. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A vertical antenna
B	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground
C	A left-hand circularly polarized antenna
D	A right-hand circularly polarized antenna

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 harmonic radiation
C	To reduce distortion due to excessive drive
D	To increase overall efficiency

15. - 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	An external RF oscillator
B	The attenuated RF output of the transmitter
C	The transmitter balanced mixer output
D	The local oscillator of the transmitter

16. - G4C10

What could be a symptom of a ground loop somewhere in your station?

Select	Answer
A	The SWR reading for one or more antennas is suddenly very high
B	An item of station equipment starts to draw excessive amounts of current
C	You receive reports of "hum" on your station's transmitted signal
D	You receive reports of harmonic interference from your station

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

18. - 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 can only receive circularly polarized signals
C	Harmonic radiation may increase
D	Short antennas are more likely to cause distortion of transmitted signals

19. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the frequency of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance decreases

20. - G5B03

How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?

Select	Answer
A	400 watts
B	0.5 watts
C	3200 watts
D	200 watts

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To insure that the volume of the primary winding is equal to the volume of the secondary winding
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To improve the coupling between the primary and secondary
D	To accommodate the higher current of the primary

22. - G6A03

What is the approximate junction threshold voltage of a germanium diode?

Select	Answer
A	0.7 volts
B	0.3 volts
C	1.0 volts
D	0.1 volt

23. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Programmable Logic
B	Analog
C	MMIC
D	Digital

24. - G7A13

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

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

25. - G7B08

How is the efficiency of an RF power amplifier determined?

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

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	Product detector
B	IF filter
C	Balanced modulator
D	RF oscillator

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's automatic level control (ALC) is properly adjusted
B	Signal distortion caused by excessive drive
C	The transmitter's carrier is properly suppressed
D	Signal distortion caused by insufficient collector current

28. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	All of these choices are correct
B	To aid in tuning your transmitter
C	Some modes have high duty cycles which could exceed the transmitter's average power rating.
D	To allow time for the other station to break in during a transmission

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The approximate transmitted symbol rate
B	The number of characters that can be represented by PSK31
C	The version of the PSK protocol
D	The year in which PSK31 was invented

30. - G9A07

What must be done to prevent standing waves on an antenna feed line?

Select	Answer
A	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
B	The feed line must be cut to a length equal to an even number of physical half wavelengths
C	The feed line must be cut to a length equal to an odd number of electrical quarter wavelengths
D	The antenna feed point must be at DC ground potential

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Slope the radials downward
B	Slope the radials upward
C	Shorten the radials
D	Lengthen the radials

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

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A vertical antenna
B	A helical antenna for space reception
C	A broad-band mobile antenna
D	A very long and low directional receiving antenna

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Take precautions to ensure that the antenna cannot be pointed in their direction
B	Use an antenna with a higher front-to-back ratio
C	Change to a non-polarized antenna with higher gain
D	Post a warning sign that is clearly visible to the neighbor

35. - G0B14

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

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

Figure G7-1