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

Anonymous User

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

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

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 are allowed to use the band only if they do not cause harmful interference to primary users
B	Amateur stations are allowed to use the band only during emergencies
C	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Identifying net frequencies
C	Transmission of bulletins of general interest to Amateur Radio licensees
D	Automatic identification of repeaters

3. - G1C07

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

Select	Answer
A	56 kilobaud
B	19.6 kilobaud
C	300 baud
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	For as long as your current license is valid
C	365 days
D	30 days

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	Only if the 10-meter repeater control operator holds at least a General Class license
D	Under no circumstances

6. - G2A03

Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?

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

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	Report the interference to your local Amateur Auxiliary Coordinator
B	Tell the interfering stations to change frequency
C	Increase power to overcome interference
D	As a common courtesy, move your contact to another frequency

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	AR
C	BK
D	KN

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To coordinate repeaters for efficient and orderly spectrum usage
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 provide emergency and public safety communications

10. - G2E12

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is horizontal, signal strength is intensity, time is vertical
C	Frequency is vertical, signal strength is horizontal, time is intensity
D	Frequency is vertical, signal strength is intensity, time is horizontal

11. - G3A13

What does the A-index indicate?

Select	Answer
A	The amount of polarization of the Sun's electric field
B	The relative position of sunspots on the surface of the Sun
C	The long term stability of the Earth's geomagnetic field
D	The solar radio flux at Boulder, Colorado

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

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

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	All of these choices are correct
B	They have a wavering sound
C	They have high intelligibility
D	They have very large swings in signal strength

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

15. - G4B13

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

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

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	The DSP filter is much more effective at VHF frequencies
B	Mixing products are greatly reduced
C	Fewer digital components are required
D	A wide range of filter bandwidths and shapes can be created

17. - G4D04

What does an S meter measure?

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

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To narrow the operating bandwidth of the antenna
B	To increase the "Q" of the antenna
C	To reduce high voltage discharge from the tip of the antenna
D	To reduce the chance of damage if the antenna should strike an object

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Reluctance
B	Admittance
C	Reactance
D	Conductance

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	3200 watts
C	200 watts
D	0.5 watts

21. - G5C09

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

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

22. - G6A02

What is an advantage of the low internal resistance of nickel-cadmium batteries?

Select	Answer
A	High discharge current
B	High voltage
C	Long life
D	Rapid recharge

23. - G6B12

Which of the following connectors would be a good choice for a serial data port?

Select	Answer
A	Type N
B	DE-9
C	Type SMA
D	PL-259

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Faster switching time makes higher output voltage possible
B	All of these choices are correct
C	High frequency operation allows the use of smaller components
D	Fewer circuit components are required

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	High Efficiency
B	Low distortion
C	Low standby power
D	No need for bias

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Variable frequency with the stability of a crystal oscillator
B	Relatively low power consumption
C	Wide tuning range and no need for band switching
D	Relatively high power output

27. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Multiplex modulation
B	Phase modulation
C	Amplitude modulation
D	Pulse modulation

28. - G8B05

What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

Select	Answer
A	31.5 Hz
B	1800 Hz
C	2300 Hz
D	500 Hz

29. - G8C08

Which of the following statements is true about PSK31?

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

30. - G9A07

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

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

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter Radials
B	Lower feed point impedance
C	Lower radiation resistance
D	Lower ground reflection losses

32. - G9C20

What is meant by the terms dBi and dBd when referring to antenna gain?

Select	Answer
A	dBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna
B	dBi refers to an isometric antenna, dBd refers to a discone antenna
C	dBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna
D	dBi refers to an isotropic antenna, dBd refers to a dipole antenna

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	Its impedance is too low for effective matching
B	All of these choices are correct
C	It has high losses compared to other types of antennas
D	It has poor directivity

34. - G0A05

What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?

Select	Answer
A	Secure written permission from your neighbors to operate above the controlled MPE limits
B	Take action to prevent human exposure to the excessive RF fields
C	File an Environmental Impact Statement (EIS-97) with the FCC
D	All of these choices are correct

35. - G0B14

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

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