US Amateur Radio - General 2007 Practice Test

Anonymous User

US Amateur Radio - General 2007 Practice Test

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

1. - G1A12

When a General Class licensee is not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The lower end
B	The upper end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
C	The lower end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz
D	The upper end

2. - G1B04

Which of the following must be true before an amateur station may provide news information to the media during a disaster?

Select	Answer
A	Both amateur stations must be RACES stations
B	The information must directly relate to the immediate safety of human life or protection of property and there is no other means of communication available
C	The FCC must have declared a state of emergency
D	The exchange of such information must be approved by a local emergency preparedness official and transmitted on officially designated frequencies

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10 meter band?

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

4. - G1D04

Which of the following are requirements for administering a Technician Class operator examination?

Select	Answer
A	At Least three VEC-accredited General Class or higher VEs must be present
B	At least two General Class or higher VEs must be present, but only one need be VEC accredited
C	At least three VEs of Technician Class or higher must be present
D	At least two VEC-accredited General Class or higher VEs must be present

5. - G1E05

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

Select	Answer
A	Only messages for other licensed amateurs
B	Any message, as long as the amateur operator is not paid
C	Only messages relating to amateur radio or remarks of a personal character, or messages relating to emergencies or disaster relief
D	No messages may be transmitted to foreign countries for third parties

6. - G2A11

Which of the following user adjustable controls are usually associated with VOX circuitry?

Select	Answer
A	VOX Sensitivity
B	Anti-VOX
C	VOX Delay
D	All of these choices are correct

7. - G2B03

What should you do if you notice increasing interference from other activity on a frequency you are using?

Select	Answer
A	Turn on your amplifier
B	Tell the interfering stations to change frequency since you were there first
C	Move your contact to another frequency
D	Report the interference to your local Amateur Auxiliary Coordinator

8. - G2C08

When are you prohibited from helping a station in distress?

Select	Answer
A	When the station in distress offers no call sign
B	When the station is not another amateur station
C	When that station is not transmitting on amateur frequencies
D	You are never prohibited from helping any station in distress

9. - G2D02

What are the objectives of the Amateur Auxiliary?

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

10. - G2E03

What part of a data packet contains the routing and handling information?

Select	Answer
A	Footer
B	Header
C	Preamble
D	Directory

11. - G2F04

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

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

12. - G3A13

What is the A-index?

Select	Answer
A	An index of solar radio flux measured at Boulder, Colorado
B	The amount of polarization of the sun's electric field
C	An indicator of the long term stability of the Earth's geomagnetic field
D	An index of the relative position of sunspots on the surface of the sun

13. - G3B11

What happens to HF propagation when the lowest usable frequency (LUF) exceeds the maximum usable frequency (MUF)?

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	HF communications over the path are enhanced at the frequency where the LUF and MUF are the same
C	Double hop propagation along the path is more common
D	No HF radio frequency will support communications over the path

14. - G3C14

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

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

15. - G4A05

How is DSP filtering accomplished?

Select	Answer
A	By converting the signal from digital to analog and taking the difference of mixing products
B	By converting the signal from analog to digital and using digital processing
C	By up-converting the signal to VHF
D	By using direct signal phasing

16. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Complex waveforms can be measured
B	Input impedance is much lower
C	Complex impedances can be easily measured
D	An oscilloscope uses less power

17. - G4C11

Which of the following can cause unintended rectification of RF signal energy and can result in interference to your station as well as nearby radio and TV receivers?

Select	Answer
A	Induced currents in conductors that are in poor electrical contact
B	Induced voltages in conductors that are in good electrical contact
C	Excessive standing wave ratio (SWR) of the transmission line system
D	Capacitive coupling of the RF signal to ground

18. - G4D09

Which of these connector types is commonly used for RF service at frequencies up to 150 MHz?

Select	Answer
A	Octal
B	UHF
C	RJ-11
D	DB-25

19. - G4E03

Which of the following power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	A direct, fused connection to the battery using heavy gauge wire
B	A direct, fused connection to the battery using resistor wire
C	A direct, fused connection to the alternator or generator using heavy gauge wire
D	A direct, fused connection to the alternator or generator using resistor wire

20. - G5A13

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

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

21. - G5B05

How many watts are being dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms?

Select	Answer
A	Approximately 39 milliwatts
B	Approximately 11 milliwatts
C	Approximately 9 milliwatts
D	Approximately 61 milliwatts

22. - G5C10

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

Select	Answer
A	30 millihenrys
B	.30 Henrys
C	3.3 Henrys
D	3.3 millihenrys

23. - G6A13

What type of component is a thermistor?

Select	Answer
A	A special type of transistor for use at very cold temperatures
B	A device having a controlled change in resistance with temperature variations
C	A resistor that is resistant to changes in value with temperature variations
D	A capacitor that changes value with temperature

24. - G6B03

What is the approximate junction threshold voltage of a germanium diode?

Select	Answer
A	0.1 volt
B	0.3 volts
C	1.0 volts
D	0.7 volts

25. - G6C04

What is meant by the term ROM?

Select	Answer
A	Resistant to Overload Memory
B	Random Operational Memory
C	Resistor Operated Memory
D	Read Only Memory

26. - G7A20

Which symbol in figure G7-1 represents a single cell battery?

Select	Answer
A	Symbol 8
B	Symbol 13
C	Symbol 12
D	Symbol 5

27. - G7B05

How many states are there in a 3-bit binary counter?

Select	Answer
A	3
B	16
C	8
D	6

28. - G8A11

What happens to the RF carrier signal when a modulating audio signal is applied to an FM transmitter?

Select	Answer
A	The carrier amplitude changes proportionally to the instantaneous frequency of the modulating signal
B	The carrier frequency changes proportionally to the instantaneous amplitude of the modulating signal
C	The carrier phase changes proportionally to the instantaneous amplitude of the modulating signal
D	The carrier frequency changes proportionally to the amplitude and frequency of the modulating signal

29. - G8B07

What is the frequency deviation for a 12.21-MHz reactance-modulated oscillator in a 5-kHz deviation, 146.52-MHz FM-phone transmitter?

Select	Answer
A	101.75 Hz
B	5 kHz
C	60 kHz
D	416.7 Hz

30. - G9A01

Which of the following factors help determine the characteristic impedance of a parallel conductor antenna feedline?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The radius of the conductors and the frequency of the signal
C	The distance between the centers of the conductors and the length of the line
D	The frequency of the signal and the length of the line

31. - G9B07

How does the feed-point impedance of a 1/2 wave dipole antenna change as the antenna is lowered from 1/4 wave above ground?

Select	Answer
A	It is unaffected by the height above ground
B	It steadily decreases
C	It steadily increases
D	It peaks at about 1/8 wavelength above ground

32. - G9C18

Which of the following antenna types consists of a driven element and some combination of parasitically excited reflector and/or director elements?

Select	Answer
A	A collinear array
B	A Yagi antenna
C	A double-extended Zepp antenna
D	A rhombic antenna

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

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

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	An oscilloscope with a high-stability crystal marker generator
C	A receiver with an S meter
D	A betascope with a dummy antenna calibrated at 50 ohms

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	15 amperes
B	30 amperes
C	100 amperes
D	60 amperes

Figure G7-1