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	4005 kHz
C	3900 kHz
D	3750 kHz

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	300 feet
B	200 feet
C	100 feet
D	50 feet

3. - G1C02

What is the maximum transmitting power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	200 watts PEP output
C	1500 watts PEP output
D	50 watts PEP output

4. - G1D10

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

Select	Answer
A	There is no age limit
B	12 years
C	21 years
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	Any language recognized by the United Nations
D	The language being used for the contact

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It allows "hands free" operation
B	It provides more power output
C	The received signal is more natural sounding
D	It occupies less bandwidth

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately cease all transmissions
B	Continue your communication because you were on the frequency first
C	Change to a different frequency
D	Acknowledge the station in distress and determine what assistance may be needed

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	We have already confirmed by card
B	I acknowledge receipt
C	We have worked before
D	Send slower

9. - G2D06

How is a directional antenna pointed when making a "long-path" contact with another station?

Select	Answer
A	180 degrees from its short-path heading
B	Toward the north
C	Toward the rising Sun
D	Along the gray line

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	DSB
B	LSB
C	USB
D	CW

11. - G3A12

What does the K-index indicate?

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

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

13. - G3C09

What type of radio wave propagation allows a signal to be detected at a distance too far for ground wave propagation but too near for normal sky-wave propagation?

Select	Answer
A	Scatter
B	Short-path skip
C	Sporadic-E skip
D	Faraday rotation

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	All of these choices are correct
B	Improper action of ALC distorts the signal and can cause spurious emissions
C	ALC will invert the modulation of the AFSK mode
D	When using digital modes, too much ALC activity can cause the transmitter to overheat

15. - G4B06

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

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

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	Mixing products are greatly reduced
C	A wide range of filter bandwidths and shapes can be created
D	The DSP filter is much more effective at VHF frequencies

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

18. - G4E03

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

Select	Answer
A	To the battery using heavy gauge wire
B	To the battery using resistor wire
C	To the alternator or generator using heavy gauge wire
D	To the alternator or generator using resistor wire

19. - G5A10

What unit is used to measure impedance?

Select	Answer
A	Ampere
B	Volt
C	Ohm
D	Watt

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

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To insure that the volume of the primary winding is equal to the volume of the secondary winding
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To improve the coupling between the primary and secondary
D	To accommodate the higher current of the primary

22. - G6A09

Which of the following describes the construction of a MOSFET?

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

23. - G6B09

Which of the following is a characteristic of a liquid crystal display?

Select	Answer
A	All of these choices are correct
B	It offers a wide dynamic range
C	It has a wide viewing angle
D	It requires ambient or back lighting

24. - G7A09

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

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

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is high only when both inputs are high
B	Output is high when either or both inputs are low
C	Output is low only when both inputs are high
D	Output is low when either or both inputs are high

26. - G7C07

What is the simplest combination of stages that implement a superheterodyne receiver?

Select	Answer
A	RF amplifier, mixer, IF discriminator
B	HF oscillator, prescaler, audio amplifier
C	RF amplifier, detector, audio amplifier
D	HF oscillator, mixer, detector

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Single sideband
D	Double sideband

28. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	5 kHz
B	3 kHz
C	8 kHz
D	16 kHz

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Viterbi
B	Volumetric
C	Varicode
D	Binary

30. - G9A11

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 50 ohm impedance?

Select	Answer
A	2:1
B	50:50
C	0:0
D	1:1

31. - G9B12

What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?

Select	Answer
A	21 feet
B	8 feet
C	16 feet
D	11 feet

32. - G9C05

How does increasing boom length and adding directors affect a Yagi antenna?

Select	Answer
A	Beamwidth increases
B	Gain increases
C	Front to back ratio decreases
D	Front to side ratio decreases

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A broad-band mobile antenna
B	A vertical antenna
C	A very long and low directional receiving antenna
D	A helical antenna for space reception

34. - G0A05

What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?

Select	Answer
A	All of these choices are correct
B	Take action to prevent human exposure to the excessive RF fields
C	File an Environmental Impact Statement (EIS-97) with the FCC
D	Secure written permission from your neighbors to operate above the controlled MPE limits

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	All wires
B	Only the neutral wire
C	Only the two wires carrying voltage
D	Only the ground wire

Figure G7-1