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. - G1A04

Which of the following amateur bands is restricted to communication on only specific channels, rather than frequency ranges?

Select	Answer
A	60 meters
B	30 meters
C	11 meters
D	12 meters

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	A beacon station may not use automatic control
B	There must be no more than one beacon signal transmitting in the same band from the same station location
C	The frequency must be coordinated with the National Beacon Organization
D	The frequency must be posted on the Internet or published in a national periodical

3. - G1C09

What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

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

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	There is no age limit
D	18 years

5. - G1E09

What language must be used when identifying your station if you are using a language other than English in making a contact using phone emission?

Select	Answer
A	English, Spanish, French, or German
B	English only
C	The language being used for the contact
D	Any language recognized by the United Nations

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When they seize your equipment for use in disaster communications
B	When they declare a temporary state of communication emergency
C	When the President's War Emergency Powers have been invoked
D	Only when all amateur stations are instructed to stop transmitting

8. - G2C10

What does the Q signal "QRN" mean?

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

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	Date and time of contact
B	Band and/or frequency of the contact
C	All of these choices are correct
D	Call sign of station contacted and the signal report given

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	Send broadcast packets containing your call sign while in MONITOR mode
C	Send a NAK response continuously so that the sending station has to pause
D	Joining an existing contact is not possible, PACTOR connections are limited to two stations

11. - G3A12

What does the K-index indicate?

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

12. - G3B02

Which of the following is a good indicator of the possibility of sky-wave propagation on the 6-meter band?

Select	Answer
A	Severe attenuation of signals on the 10-meter band
B	Short skip sky-wave propagation on the 10-meter band
C	Long skip sky-wave propagation on the 10-meter band
D	Long delayed echoes on the 10-meter band

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Signals are scattered from the magnetosphere which is not a good reflector
B	Only a small part of the signal energy is scattered into the skip zone
C	Propagations is through ducts in F region which absorb most of the energy
D	Propagation is through ground waves which absorb most of the signal energy

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 dip
C	No change will be observed
D	A pronounced peak

15. - G4B06

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

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

16. - G4C11

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

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

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	7.175 to 7.178 MHz
B	7.178 to 7.184 MHz
C	7.1765 to 7.1795 MHz
D	7.178 to 7.181 MHz

18. - G4E11

Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

Select	Answer
A	A large energy storage system is needed to supply power when the wind is not blowing
B	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent
C	All of these choices are correct
D	The voltage and current ratings of such systems are not compatible with amateur equipment

19. - G5A10

What unit is used to measure impedance?

Select	Answer
A	Ohm
B	Volt
C	Watt
D	Ampere

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It is the sum of the reciprocal of each individual voltage drop
B	It decreases as more parallel branches are added to the circuit
C	It equals the average of each branch current
D	It equals the sum of the currents through each branch

21. - G5C10

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

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

22. - G6A06

Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?

Select	Answer
A	Lower capacitance
B	Longer switching times
C	Lower inductance
D	Higher breakdown voltage

23. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Better suited for power supply regulation
C	Better suited for RF amplification
D	Low power consumption

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	Double the normal peak output voltage of the power supply
B	Equal to the normal peak output voltage of the power supply
C	One-quarter the normal output voltage of the power supply
D	Half the normal output voltage of the power supply

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The number of stages in the counter
C	The inductance and capacitance in the tank circuit
D	The time delay of the lag circuit

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Mixer
B	Phase inverter
C	Product detector
D	Discriminator

27. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Amplitude modulation
B	Multiplex modulation
C	Pulse modulation
D	Phase modulation

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

29. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters use longer Varicode signals and thus slow down transmission
B	Higher power is needed as compared to RTTY for similar error rates
C	Varicode Error Correction is used to ensure accurate message reception
D	Upper case letters make the signal stronger

30. - G9A14

What is the interaction between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR reduces the relative effect of transmission line loss
B	There is no interaction between transmission line loss and SWR
C	High SWR makes it difficult to measure transmission line loss
D	If a transmission line is lossy, high SWR will increase the loss

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	Parallel to the antenna element
B	At the center of the antenna
C	As high as possible above the ground
D	On the surface of the Earth or buried a few inches below the ground

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
B	The ratio of forward gain to dipole gain
C	The number of directors versus the number of reflectors
D	The relative position of the driven element with respect to the reflectors and directors

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 have poor harmonic rejection
D	They must be used with an antenna tuner

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	Its frequency
B	Its duty cycle
C	Its power density
D	All of these choices are correct

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