US Amateur Radio - General (Element 3, 2015-2019) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2015-2019) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G1A06

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

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

2. - G1B05

When may music be transmitted by an amateur station?

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

3. - G1C05

Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1000 watts PEP output
B	2000 watts PEP output
C	1500 watts PEP output
D	100 watts PEP output

4. - G1D10

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

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

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Any message, as long as the amateur operator is not paid
B	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
C	Only messages for other licensed amateurs
D	Any messages, as long as the text of the message is recorded in the station log

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

Select	Answer
A	Lower sideband
B	Double sideband
C	Vestigial sideband
D	Upper sideband

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	Except during FCC declared emergencies, no one has priority access to frequencies
B	QSOs in progress always have priority
C	Contest operations must always yield to non-contest use of frequencies
D	Nets always have priority

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	100 percent copy
B	Chirpy or unstable signal
C	Key clicks
D	Report was read from an S meter rather than estimated

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	The ITU requires a log of all international third party traffic
B	The ITU requires a log of all international contacts
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information

10. - G2E07

What segment of the 80-meter band is most commonly used for digital transmissions?

Select	Answer
A	3570 - 3600 kHz
B	3775 - 3825 kHz
C	3700 - 3750 kHz
D	3500 - 3525 kHz

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

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

12. - G3B06

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

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

13. - G3C12

Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?

Select	Answer
A	The F2 layer
B	The D layer
C	The E layer
D	The F1 layer

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Insufficient drive power
B	Low input SWR
C	Excessive drive power
D	Shorting the input signal to ground

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 high precision is desired
C	When adjusting tuned circuits
D	When testing logic circuits

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. - 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 14.647 MHz
B	14.3455 to 14.3485 MHz
C	14.344 to 14.347 MHz
D	14.347 to 14.350 MHz

18. - G4E08

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

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

19. - G5A13

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

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

20. - G5B03

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

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

21. - G5C10

What is the inductance of three 10 millihenry inductors connected in parallel?

Select	Answer
A	0.30 henrys
B	3.3 henrys
C	30 millihenrys
D	3.3 millihenrys

22. - G6A09

Which of the following describes the construction of a MOSFET?

Select	Answer
A	The source is separated from the drain by a thin insulating layer
B	The gate is formed by a back-biased junction
C	The gate is separated from the channel with a thin insulating layer
D	The source is formed by depositing metal on silicon

23. - G6B15

What is the main reason to use keyed connectors instead of non-keyed types?

Select	Answer
A	Higher current carrying capacity
B	Prevention of use by unauthorized persons
C	All of these choices are correct
D	Reduced chance of incorrect mating

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. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	6
B	8
C	16
D	3

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	RF amplifier
B	IF amplifier
C	Filter
D	Carrier oscillator

27. - G8A01

How is an FSK signal generated?

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

28. - G8B05

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

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

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 7-bit code with start, stop and parity bits
B	A code using error detection and correction
C	A code using SELCAL and LISTEN
D	A 5-bit code with additional start and stop bits

30. - G9A13

What standing wave ratio will result when connecting a 50 ohm feed line to an antenna that has a purely resistive 300 ohm feed point impedance?

Select	Answer
A	6:1
B	You cannot determine SWR from impedance values
C	1.5:1
D	3:1

31. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	16 feet
B	24 feet
C	32 feet
D	8 feet

32. - G9C19

How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	dBi gain figures are 2.15 dB higher than dBd gain figures
B	dBi gain figures are the reciprocal of dBd gain figures + 2.15 dB
C	dBi gain figures are 2.15 dB lower then dBd gain figures
D	dBi gain figures are the same as the square root of dBd gain figures multiplied by 2.15

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They must be fed with open wire line
C	They present low impedance on all design frequencies
D	They must be used with an antenna tuner

34. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?

Select	Answer
A	All of these choices are correct
B	Perform a routine RF exposure evaluation
C	Post a copy of FCC Part 97.13 in the station
D	Post a copy of OET Bulletin 65 in the station

35. - G0B04

Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

Select	Answer
A	Lack of oxygen for adequate combustion
B	Danger of carbon monoxide poisoning
C	Lack of nitrogen for adequate combustion
D	Danger of engine over torque