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 during emergencies
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 if they do not cause harmful interference to primary users

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	50 feet
C	200 feet
D	300 feet

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	300 baud
C	19.6 kilobaud
D	1200 baud

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Wireless Telecommunications Bureau
B	The Federal Communications Commission
C	A Volunteer Examiner Coordinator
D	The Universal Licensing System

5. - G1E07

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

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

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

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

7. - G2B07

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

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

8. - G2C03

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

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

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows accurate land masses
B	A map that shows true bearings and distances from a particular location
C	A map that shows the angle at which an amateur satellite crosses the equator
D	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit

10. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	850 Hz
B	170 Hz
C	85 Hz
D	425 Hz

11. - G3A14

How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?

Select	Answer
A	HF communications are improved
B	VHF/UHF ducting is disturbed
C	VHF/UHF ducting is improved
D	HF communications are disturbed

12. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	Solar radiation and ionospheric disturbances
B	Time of day and season
C	Path distance and location
D	All of these choices are correct

13. - G3C02

Where on the Earth do ionospheric layers reach their maximum height?

Select	Answer
A	Where the Sun is overhead
B	Where the Sun is on the opposite side of the Earth
C	Where the Sun has just set
D	Where the Sun is rising

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. - G4B05

Why is high input impedance desirable for a voltmeter?

Select	Answer
A	It decreases battery consumption in the meter
B	It improves the resolution of the readings
C	It decreases the loading on circuits being measured
D	It improves the frequency response

16. - G4C11

Which of the following is a function of a digital signal processor?

Select	Answer
A	To remove noise from received signals
B	To increase antenna bandwidth
C	To provide adequate grounding
D	To increase antenna gain

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Increase the intelligibility of transmitted phone signals during poor conditions
B	Prevent distortion of voice signals
C	Increase transmitter bass response for more natural sounding SSB signals
D	Decrease high-frequency voice output to prevent out of band operation

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photovoltaic conversion
B	Photon emission
C	Photon decomposition
D	Photosynthesis

19. - G5A08

Why is impedance matching important?

Select	Answer
A	To ensure that the resistance and reactance in the circuit are equal
B	So the source can deliver maximum power to the load
C	So the load will draw minimum power from the source
D	To ensure that there is less resistance than reactance in the circuit

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	1.414
B	1.00
C	2.00
D	0.707

21. - G5C08

What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?

Select	Answer
A	10.750 nanofarads
B	576.9 nanofarads
C	1733 picofarads
D	3583 picofarads

22. - G6A04

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

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

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Longer life
B	Lower power consumption
C	All of these choices are correct
D	Faster response time

24. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 5
B	Symbol 11
C	Symbol 1
D	Symbol 4

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class A
C	Class C
D	Class B

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

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

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Higher symbol rates require wider bandwidth
B	Symbol rate and bandwidth are not related
C	Lower symbol rates require wider bandwidth
D	Bandwidth is always half the symbol rate

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It requests the packet be retransmitted
B	It terminates the contact
C	It sends the packet back to the transmitting station
D	It requests a change in transmitting protocol

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	50:1
B	1:5
C	5:1
D	2:1

31. - G9B05

How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
B	Antenna height has no effect on the pattern
C	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
D	If the antenna is too high, the pattern becomes unpredictable

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

33. - G9D10

Which of the following describes a Beverage antenna?

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

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should not be installed higher than you can reach
B	It should not be installed in a wet area
C	It should limited to 10 feet in height
D	It should be installed such that it is protected against unauthorized access

35. - G0B15

Which of the following is true of an emergency generator installation?

Select	Answer
A	All of these choices are correct
B	The generator should be located in a well-ventilated area
C	The generator must be insulated from ground
D	Fuel should be stored near the generator for rapid refueling in case of an emergency

Figure G7-1