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. - G1A01

On which of the following bands is a General Class license holder granted all amateur frequency privileges?

Select	Answer
A	60, 20, 17, and 12 meters
B	160, 30, 17, 15, 12, and 10 meters
C	160, 80, 40, and 10 meters
D	160, 60, 30, 17, 12, and 10 meters

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	All of these choices are correct
B	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event
C	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
D	The FCC must have declared a state of emergency

3. - G1C09

What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

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

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	There is no age limit
B	21 years
C	12 years
D	18 years

5. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The control operator of the interrogating station must hold an Extra Class license
B	The interrogating transmission must be made by another automatically controlled station
C	No third party traffic maybe be transmitted
D	The station initiating the contact must be under local or remote control

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Because it is fully compatible with an AM detector
B	Lower sideband is the only sideband legal on these frequency bands
C	Current amateur practice is to use lower sideband on these frequency bands
D	Lower sideband is more efficient than upper sideband at these frequencies

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

8. - G2C02

What should you do if a CW station sends "QRS"?

Select	Answer
A	Send slower
B	Increase your power
C	Repeat everything twice
D	Change frequency

9. - G2D06

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

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

10. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Transmit a steady carrier until the PACTOR protocol times out and disconnects
C	Joining an existing contact is not possible, PACTOR connections are limited to two stations
D	Send a NAK response continuously so that the sending station has to pause

11. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A thunderstorm which affects radio propagation
B	Ripples in the ionosphere
C	A sudden drop in the solar flux index
D	A temporary disturbance in the Earth's magnetosphere

12. - G3B07

What does LUF stand for?

Select	Answer
A	The Longest Universal Function for communications between two points
B	The Lowest Usable Frequency for communications between two points
C	The Lowest Usable Frequency during a 24 hour period
D	The Longest Universal Function during a 24 hour period

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
C	The long path azimuth of a distant station
D	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions

14. - G4A11

Which of the following is a use for the IF shift control on a receiver?

Select	Answer
A	To avoid interference from stations very close to the receive frequency
B	To change frequency rapidly
C	To permit listening on a different frequency from that on which you are transmitting
D	To tune in stations that are slightly off frequency without changing your transmit frequency

15. - G4B14

What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

Select	Answer
A	When measuring the frequency of an oscillator
B	When testing logic circuits
C	When high precision is desired
D	When adjusting tuned circuits

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	Distorted speech
B	On-and-off humming or clicking
C	A steady hum whenever the transmitter is on the air
D	Clearly audible speech

17. - G4D03

Which of the following can be the result of an incorrectly adjusted speech processor?

Select	Answer
A	Distorted speech
B	All of these choices are correct
C	Excessive background pickup
D	Splatter

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 battery using resistor wire
D	To the alternator or generator using resistor wire

19. - G5A13

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	All of these choices are correct
B	A length of transmission line
C	A Pi-network
D	A transformer

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the sum of the currents through each branch
B	It decreases as more parallel branches are added to the circuit
C	It equals the average of each branch current
D	It is the sum of the reciprocal of each individual voltage drop

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. - G6A04

When is it acceptable to recharge a carbon-zinc primary cell?

Select	Answer
A	When the cell is kept warm during the recharging period
B	When a constant current charger is used
C	As long as the voltage has not been allowed to drop below 1.0 volt
D	Never

23. - G6B16

Which of the following describes a type N connector?

Select	Answer
A	An audio connector used in surround-sound installations
B	A moisture-resistant RF connector useful to 10 GHz
C	A threaded connector used for hydraulic systems
D	A small bayonet connector used for data circuits

24. - G7A07

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

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

25. - G7B07

What are the basic components of virtually all sine wave oscillators?

Select	Answer
A	A circulator and a filter operating in a feed-forward loop
B	A filter and an amplifier operating in a feedback loop
C	A frequency multiplier and a mixer
D	An amplifier and a divider

26. - G7C03

What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?

Select	Answer
A	Mixer
B	Detector
C	Balanced modulator
D	IF amplifier

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By changing an oscillator's frequency directly with a digital control signal
B	By keying an FM transmitter with a sub-audible tone
C	By using a transceiver's computer data interface protocol to change frequencies
D	By reconfiguring the CW keying input to act as a tone generator

28. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Intermediate interference
B	Quadrature noise
C	Image response
D	Mixer interference

29. - G8C02

How many data bits are sent in a single PSK31 character?

Select	Answer
A	5
B	7
C	The number varies
D	8

30. - G9A14

What is the interaction between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	There is no interaction between transmission line loss and SWR
B	High SWR reduces the relative effect of transmission line loss
C	If a transmission line is lossy, high SWR will increase the loss
D	High SWR makes it difficult to measure transmission line loss

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

32. - G9C16

How does the gain of a two-element delta-loop beam compare to the gain of a two-element quad antenna?

Select	Answer
A	3 dB lower
B	3 dB higher
C	2.54 dB higher
D	About the same

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Gain varies logarithmically as a function of frequency
B	Length and spacing of the elements increase logarithmically from one end of the boom to the other
C	SWR varies periodically as a function of boom length
D	Impedance varies periodically as a function of frequency

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	Ensure that you and the antenna structure are grounded
B	Wear a radiation badge
C	All of these choices are correct
D	Turn off the transmitter and disconnect the feed line

35. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	Notify the electric company that a person will be working on the tower
B	Make sure all circuits that supply power to the tower are locked out and tagged
C	All of these choices are correct
D	Unground the base of the tower