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. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	17 meters
B	30 meters
C	160 meters
D	12 meters

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	They are not permitted
B	Only "10 codes" are permitted
C	Only "Q" signals are permitted
D	They may be used if they do not obscure the meaning of a message

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Power should be limited as necessary to avoid interference to another radio service on the frequency
B	Effective radiated power cannot exceed 1500 watts
C	Only the minimum power necessary to carry out the desired communications should be used
D	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

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

6. - G2A05

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

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

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Sending without error
B	Operating split to avoid interference on frequency
C	Matching your transmit frequency to the frequency of a received signal
D	Matching the speed of the transmitting station

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

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

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Insufficient modulation
B	Overmodulation
C	Long Path propagation
D	Backscatter propagation

11. - G3A12

What does the K-index indicate?

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

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	HF communications over the path are enhanced
B	Double hop propagation along the path is more common
C	No HF radio frequency will support ordinary sky-wave communications over the path
D	Propagation over the path on all HF frequencies is enhanced

13. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A left-hand circularly polarized antenna
B	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground
C	A vertical antenna
D	A right-hand circularly polarized antenna

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced peak
C	No change will be observed
D	A pronounced dip

15. - G4B06

What is an advantage of a digital voltmeter as compared to an analog voltmeter?

Select	Answer
A	Better precision for most uses
B	Faster response
C	Better for RF measurements
D	Better for measuring computer circuits

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Bypass inductor
B	Bypass capacitor
C	Forward-biased diode
D	Reverse-biased diode

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 to 14.350 MHz
B	14.3455 to 14.3485 MHz
C	14.347 to 14.647 MHz
D	14.344 to 14.347 MHz

18. - G4E02

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

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

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

20. - G5B11

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

Select	Answer
A	0.707
B	1.00
C	2.00
D	1.414

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	10000 ohms
B	80 ohms
C	0.17 ohms
D	5.9 ohms

22. - G6A08

Why must the cases of some large power transistors be insulated from ground?

Select	Answer
A	To increase the beta of the transistor
B	To avoid shorting the collector or drain voltage to ground
C	To improve the power dissipation capability
D	To reduce stray capacitance

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A special connector for microwave interfacing
B	A DC power connector rated for currents between 30 and 50 amperes
C	A family of multiple circuit connectors suitable for audio and control signals
D	A special watertight connector for use in marine applications

24. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 1
B	Symbol 5
C	Symbol 2
D	Symbol 4

25. - G7B01

Complex digital circuitry can often be replaced by what type of integrated circuit?

Select	Answer
A	Window comparator
B	Microcontroller
C	Charge-coupled device
D	Phase detector

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. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	Transmit audio or microphone gain
B	Attenuator level
C	The RF clipping level
D	Antenna inductance or capacitance

28. - G8B05

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

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

29. - G8C05

In the PACTOR protocol, what is meant by an NAK response to a transmitted packet?

Select	Answer
A	The receiver is requesting the packet be retransmitted
B	The entire file has been received correctly
C	The receiver is busy decoding the packet
D	The receiver is reporting the packet was received without error

30. - G9A05

How does the attenuation of coaxial cable change as the frequency of the signal it is carrying increases?

Select	Answer
A	Attenuation increases
B	Attenuation decreases
C	Attenuation reaches a maximum at approximately 18 MHz
D	Attenuation is independent of frequency

31. - G9B01

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

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

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	All of these choices are correct
C	It is useful for matching multiband antennas
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 vertical antenna
B	A broad-band mobile antenna
C	A helical antenna for space reception
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 in a wet area
B	It should limited to 10 feet in height
C	It should be installed such that it is protected against unauthorized access
D	It should not be installed higher than you can reach

35. - G0B05

Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?

Select	Answer
A	Current flowing from one or more of the voltage-carrying wires to the neutral wire
B	Current flowing from one or more of the voltage-carrying wires directly to ground
C	All of these choices are correct
D	Overvoltage on the voltage-carrying wires

Figure G7-1