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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	1875 kHz
B	3900 kHz
C	3750 kHz
D	4005 kHz

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	At any time, as long as it produces no spurious emissions
B	When it is transmitted on frequencies above 1215 MHz
C	When it is an incidental part of a manned space craft retransmission
D	When it is unintentionally transmitted from the background at the transmitter

3. - G1C07

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

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

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	365 days
B	For as long as your current license is valid
C	30 days
D	180 days

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	When under automatic control
B	When messages are not encrypted
C	Under no circumstances
D	When messages are encrypted

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

Select	Answer
A	Vestigial sideband
B	Lower sideband
C	Upper 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	As a common courtesy, move your contact to another frequency
C	Report the interference to your local Amateur Auxiliary Coordinator
D	Increase power to overcome interference

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Send more slowly
B	Zero beat my signal
C	I am troubled by static
D	Stop sending

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
B	Amateur volunteers who conduct amateur licensing examinations
C	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
D	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters

10. - G2E09

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

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

11. - G3A14

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

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

12. - G3B07

What does LUF stand for?

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

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 has just set
C	Where the Sun is rising
D	Where the Sun is on the opposite side of the Earth

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

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A multimeter
B	A Q meter
C	A field strength meter
D	An antenna noise bridge

16. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Using a balun to feed an unbalanced antenna
B	Lack of rectification of the transmitter's signal in power conductors
C	Not using a balun or line isolator to feed balanced antennas
D	Arcing at a poor electrical connection

17. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 to 7.184 MHz
B	7.1765 to 7.1795 MHz
C	7.175 to 7.178 MHz
D	7.178 to 7.181 MHz

18. - G4E02

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

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

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To minimize transmitter power output
B	To minimize radiation resistance
C	To reduce power supply ripple
D	To maximize the transfer of power

20. - G5B11

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

Select	Answer
A	0.707
B	1.414
C	2.00
D	1.00

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	80 ohms
B	0.17 ohms
C	5.9 ohms
D	10000 ohms

22. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To reduce grid-to-plate capacitance
B	To decrease plate resistance
C	To increase the control grid resistance
D	To increase efficiency

23. - G6B14

Which of these connector types is commonly used for audio signals in Amateur Radio stations?

Select	Answer
A	Type N
B	BNC
C	PL-259
D	RCA Phono

24. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	180 degrees
B	360 degrees
C	270 degrees
D	90 degrees

25. - G7B10

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

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

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	Filter
B	Carrier oscillator
C	IF amplifier
D	RF amplifier

27. - G8A02

What is the name of the process that changes the phase angle of an RF wave to convey information?

Select	Answer
A	Phase modulation
B	Radian inversion
C	Phase convolution
D	Angle convolution

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Cancellation
B	Heterodyning
C	Phase inverting
D	Synthesizing

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	RTTY
B	JT9 and JT65
C	FSK441 and Hellschreiber
D	Clover

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	If a transmission line is lossy, high SWR will increase the loss
C	High SWR reduces the relative effect of transmission line loss
D	High SWR makes it difficult to measure transmission line loss

31. - G9B01

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

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

32. - G9C04

Which statement about a three-element, single-band Yagi antenna is true?

Select	Answer
A	All of the elements must be the same length
B	The reflector is normally the longest element
C	The reflector is normally the shortest element
D	The director is normally the longest element

33. - G9D03

At what height above ground is an NVIS antenna typically installed?

Select	Answer
A	Height is not critical as long as it is significantly more than 1/2 wavelength
B	As close to one wavelength as possible
C	As close to 1/2 wavelength as possible
D	Between 1/10 and 1/4 wavelength

34. - G0A09

What type of instrument can be used to accurately measure an RF field?

Select	Answer
A	A calibrated field strength meter with a calibrated antenna
B	A receiver with an S meter
C	An SWR meter with a peak-reading function
D	An oscilloscope with a high-stability crystal marker generator

35. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	100 amperes
B	15 amperes
C	30 amperes
D	60 amperes