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	7.250 MHz
B	40.500 MHz
C	7.500 MHz
D	40.200 MHz

2. - G1B03

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

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

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	19.6 kilobaud
C	56 kilobaud
D	300 baud

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

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Automatically controlled digital station
B	Fail-safe digital station
C	Robotically controlled station
D	Locally controlled station

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	Lower sideband
C	Double sideband
D	Vestigial sideband

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

8. - G2C01

Which of the following describes full break-in telegraphy (QSK)?

Select	Answer
A	Breaking stations send the Morse code prosign BK
B	Automatic keyers are used to send Morse code instead of hand keys
C	An operator must activate a manual send/receive switch before and after every transmission
D	Transmitting stations can receive between code characters and elements

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

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

10. - G2E12

Which of the following describes a waterfall display?

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

11. - G3A09

What effect does a high sunspot number have on radio communications?

Select	Answer
A	Microwave communications become unstable
B	Frequencies above 300 MHz become usable for long-distance communication
C	Long-distance communication in the upper HF and lower VHF range is enhanced
D	High-frequency radio signals become weak and distorted

12. - G3B06

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

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

13. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The ionospheric layer involved is unstable
B	The E-region is not present
C	Ground waves are absorbing much of the signal
D	Energy is scattered into the skip zone through several different radio wave paths

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	When using digital modes, too much ALC activity can cause the transmitter to overheat
B	Improper action of ALC distorts the signal and can cause spurious emissions
C	All of these choices are correct
D	ALC will invert the modulation of the AFSK mode

15. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Standing wave ratio
B	RF interference
C	Antenna front-to-back ratio
D	Radio wave propagation

16. - G4C06

What effect can be caused by a resonant ground connection?

Select	Answer
A	Corrosion of the ground rod
B	A ground loop
C	Overheating of ground straps
D	High RF voltages on the enclosures of station equipment

17. - G4D06

Where is an S meter found?

Select	Answer
A	In an SWR bridge
B	In a conductance bridge
C	In a transmitter
D	In a receiver

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket's wiring may be inadequate for the current drawn by the transceiver
C	The socket is not wired with an RF-shielded power cable
D	The DC polarity of the socket is reversed from the polarity of modern HF transceivers

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Ampere
C	Siemens
D	Farad

20. - G5B03

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

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

21. - G5C07

What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

Select	Answer
A	150 to 1
B	24.4 to 1
C	300 to 1
D	12.2 to 1

22. - G6A03

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

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

23. - G6B04

What is meant by the term ROM?

Select	Answer
A	Random Operational Memory
B	Resistor Operated Memory
C	Resistant to Overload Memory
D	Read Only Memory

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Diodes
B	Capacitors and inductors
C	Quartz crystals
D	Transformers and transducers

25. - G7B04

Which of the following describes the function of a two input NOR gate?

Select	Answer
A	Output is high only when both inputs are high
B	Output is low only when both inputs are high
C	Output is low when either or both inputs are high
D	Output is high when either or both inputs are low

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	Product detector
B	Phase inverter
C	Mixer
D	Discriminator

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. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It minimizes power consumption in the receiver
B	It results in the best signal to noise ratio
C	It is required by FCC rules
D	It improves impedance matching of the antenna

29. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?

Select	Answer
A	Packets will be routed incorrectly
B	The connection is dropped
C	Encoding reverts to the default character set
D	The checksum overflows

30. - G9A11

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 50 ohm impedance?

Select	Answer
A	0:0
B	2:1
C	50:50
D	1:1

31. - G9B09

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

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

32. - G9C18

What happens when the feed point of a quad antenna of any shape is moved from the midpoint of the top or bottom to the midpoint of either side?

Select	Answer
A	The polarization of the radiated signal changes from vertical to horizontal
B	The polarization of the radiated signal changes from horizontal to vertical
C	There is no change in polarization
D	The radiated signal becomes circularly polarized

33. - G9D05

What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

Select	Answer
A	It narrows the main lobe in azimuth
B	It allows simultaneous vertical and horizontal polarization
C	It allows quick selection of vertical or horizontal polarization
D	It narrows the main lobe in elevation

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

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	High voltages can cause lead-tin solder to disintegrate suddenly
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	Tin in the solder can "cold flow" causing shorts in the circuit
D	RF energy can convert the lead into a poisonous gas