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. - G1A12

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 record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
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 are allowed to use the band only during emergencies

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	100 feet
B	300 feet
C	50 feet
D	200 feet

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	56 kilobaud
C	300 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	On any General or Technician Class band segment except 30-meters and 60-meters
B	Only on the Technician band segments until your license arrives in the mail
C	Only the Technician band segments until your upgrade is posted in the FCC database
D	On any General or Technician Class band segment

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

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

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It provides more power output
B	It occupies less bandwidth
C	It allows "hands free" operation
D	The received signal is more natural sounding

7. - G2B11

What frequency should be used to send a distress call?

Select	Answer
A	Only frequencies that are within your operating privileges
B	Only frequencies authorized for RACES or ARES stations
C	Whichever frequency has the best chance of communicating the distress message
D	Only frequencies used by police, fire or emergency medical services

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Listening for novice stations
B	Listening only for a specific station or stations
C	Operating full break-in
D	Closing station now

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To provide emergency and public safety communications
B	To conduct efficient and orderly amateur licensing examinations
C	To encourage self-regulation and compliance with the rules by radio amateur operators
D	To coordinate repeaters for efficient and orderly spectrum usage

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	SSB
B	USB
C	LSB
D	DSB

11. - G3A10

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

Select	Answer
A	Long term oscillations in the upper atmosphere
B	The Sun's rotation on its axis
C	The position of the Moon in its orbit
D	Cyclic variation in the Earth's radiation belts

12. - G3B09

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?

Select	Answer
A	12,000 miles
B	180 miles
C	2,500 miles
D	1,200 miles

13. - G3C10

Which of the following might be an indication that signals heard on the HF bands are being received via scatter propagation?

Select	Answer
A	The communication is during a sunspot maximum
B	The communication is during a sudden ionospheric disturbance
C	The signal is heard on a frequency above the Maximum Usable Frequency
D	The signal is heard on a frequency below the Maximum Usable Frequency

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 increase overall efficiency
D	To reduce distortion due to excessive drive

15. - G4B13

What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Select	Answer
A	Measuring the turns ratio of a power transformer
B	Determining the gain of a directional antenna
C	Measuring the front to back ratio of an antenna
D	Determining the impedance of an unknown or unmarked coaxial cable

16. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Not using a balun or line isolator to feed balanced antennas
B	Using a balun to feed an unbalanced antenna
C	Lack of rectification of the transmitter's signal in power conductors
D	Arcing at a poor electrical connection

17. - G4D11

How close to the upper edge of the 20-meter General Class band should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	Your displayed carrier frequency may be set at the edge of the band
B	At least 1 kHz below the edge of the segment
C	At least 3 kHz above the edge of the band
D	At least 3 kHz below the edge of the band

18. - G4E10

What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	The diode serves to regulate the charging voltage to prevent overcharge
B	The diode greatly increases the efficiency during times of high illumination
C	The diode prevents self-discharge of the battery though the panel during times of low or no illumination
D	The diode limits the current flowing from the panel to a safe value

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 source can deliver maximum power to the load
B	No current can flow through the circuit
C	The electrical load is shorted
D	The source delivers minimum 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	12.2 percent
D	20.5 percent

21. - G5C09

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

Select	Answer
A	33.3 microfarads
B	300 microfarads
C	0.33 microfarads
D	0.30 microfarads

22. - G6A10

Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?

Select	Answer
A	Heater
B	Screen Grid
C	Trigger electrode
D	Control grid

23. - G6B15

What is the main reason to use keyed connectors instead of non-keyed types?

Select	Answer
A	Higher current carrying capacity
B	Prevention of use by unauthorized persons
C	Reduced chance of incorrect mating
D	All of these choices are correct

24. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 7
C	Symbol 1
D	Symbol 11

25. - G7B11

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

Select	Answer
A	SSB
B	AM
C	All of these choices are correct
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	Substantially lower
C	About the same
D	Twice the transmission line impedance

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Double sideband
B	Single sideband
C	Phase modulation
D	Frequency modulation

28. - G8B01

What receiver stage combines a 14.250 MHz input signal with a 13.795 MHz oscillator signal to produce a 455 kHz intermediate frequency (IF) signal?

Select	Answer
A	VFO
B	BFO
C	Discriminator
D	Mixer

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	RTTY
B	FSK441 and Hellschreiber
C	JT9 and JT65
D	Clover

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The radius of the conductors and the frequency of the signal
B	The frequency of the signal and the length of the line
C	The distance between the centers of the conductors and the length of the line
D	The distance between the centers of the conductors and the radius of the conductors

31. - G9B01

What is one disadvantage of a directly fed random-wire HF antenna?

Select	Answer
A	It must be longer than 1 wavelength
B	You may experience RF burns when touching metal objects in your station
C	It produces only vertically polarized radiation
D	It is more effective on the lower HF bands than on the higher bands

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It is useful for matching multiband antennas
B	It does not require that the elements be insulated from the boom
C	It does not require any inductors or capacitors
D	All of these choices are correct

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Higher gain per element than a Yagi antenna
B	Wide bandwidth
C	Polarization diversity
D	Harmonic suppression

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	A lower transmitter duty cycle permits greater short-term exposure levels
B	A higher transmitter duty cycle permits greater short-term exposure levels
C	High duty cycle transmitters are exempt from RF exposure requirements
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

35. - G0B04

Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

Select	Answer
A	Danger of engine over torque
B	Lack of oxygen for adequate combustion
C	Lack of nitrogen for adequate combustion
D	Danger of carbon monoxide poisoning

Figure G7-1