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. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	30 meters
B	12 meters
C	20 meters
D	160 meters

2. - G1B11

How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?

Select	Answer
A	In conformance with good engineering and good amateur practice
B	In conformance with Amateur Radio custom
C	All of these choices are correct
D	In conformance with the rules of the IARU

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	1200 baud
B	19.6 kilobaud
C	300 baud
D	56 kilobaud

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	A Volunteer Examiner Coordinator
B	The Wireless Telecommunications Bureau
C	The Universal Licensing System
D	The Federal Communications Commission

5. - G1E05

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

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

6. - G2A06

Which of the following is an advantage when using single sideband as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Less subject to interference from atmospheric static crashes
B	Less bandwidth used and greater power efficiency
C	Ease of tuning on receive and immunity to impulse noise
D	Very high fidelity voice modulation

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	As a common courtesy, move your contact to another frequency
B	Report the interference to your local Amateur Auxiliary Coordinator
C	Increase power to overcome interference
D	Tell the interfering stations to change frequency

8. - G2C10

What does the Q signal "QRN" mean?

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

9. - G2D06

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

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

10. - G2E01

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

Select	Answer
A	CW
B	USB
C	DSB
D	LSB

11. - G3A10

What causes HF propagation conditions to vary periodically in a 28 day cycle?

Select	Answer
A	Long term oscillations in the upper atmosphere
B	Cyclic variation in the Earth's radiation belts
C	The Sun's rotation on its axis
D	The position of the Moon in its orbit

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Double hop propagation along the path is more common
B	HF communications over the path are enhanced
C	Propagation over the path on all HF frequencies is enhanced
D	No HF radio frequency will support ordinary sky-wave communications over the path

13. - G3C02

Where on the Earth do ionospheric layers reach their maximum height?

Select	Answer
A	Where the Sun has just set
B	Where the Sun is overhead
C	Where the Sun is on the opposite side of the Earth
D	Where the Sun is rising

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Q Multiplier
B	Balanced modulator
C	Antenna coupler or antenna tuner
D	SWR Bridge

15. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The attenuated RF output of the transmitter
B	The transmitter balanced mixer output
C	The local oscillator of the transmitter
D	An external RF oscillator

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?

Select	Answer
A	A chirpy CW signal
B	Severely distorted audio
C	A CW signal at a nearly pure audio frequency
D	On-and-off humming or clicking

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Decrease high-frequency voice output to prevent out of band operation
B	Prevent distortion of voice signals
C	Increase the intelligibility of transmitted phone signals during poor conditions
D	Increase transmitter bass response for more natural sounding SSB signals

18. - G4E02

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

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

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance decreases
B	As the amplitude of the applied AC increases, the reactance increases
C	As the frequency of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

20. - G5B05

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

Select	Answer
A	Approximately 11 watts
B	Approximately 61 milliwatts
C	Approximately 11 milliwatts
D	Approximately 61 watts

21. - G5C08

What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?

Select	Answer
A	3583 picofarads
B	576.9 nanofarads
C	1733 picofarads
D	10.750 nanofarads

22. - G6A17

Which of the following is a reason not to use wire-wound resistors in an RF circuit?

Select	Answer
A	The resistor's tolerance value would not be adequate for such a circuit
B	The resistor's inductance could make circuit performance unpredictable
C	The resistor's internal capacitance would detune the circuit
D	The resistor could overheat

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Amplifier and antenna
B	Microphone and transceiver
C	Power supply and amplifier
D	Computer and transceiver

24. - G7A05

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

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

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Add the RF input power to the DC output power
C	Divide the RF output power by the DC input power
D	Divide the DC input power by the DC output power

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	Product detector
C	Discriminator
D	Phase inverter

27. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	Attenuator level
B	The RF clipping level
C	Transmit audio or microphone gain
D	Antenna inductance or capacitance

28. - G8B03

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

Select	Answer
A	Heterodyning
B	Phase inverting
C	Synthesizing
D	Cancellation

29. - G8C08

Which of the following statements is true about PSK31?

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

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	50 and 75 ohms
B	500 and 750 ohms
C	25 and 30 ohms
D	80 and 100 ohms

31. - G9B10

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

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

32. - G9C14

How does the forward gain of a two-element quad antenna compare to the forward gain of a three-element Yagi antenna?

Select	Answer
A	About twice as much
B	About the same
C	About 1.5 times as much
D	About 2/3 as much

33. - G9D10

Which of the following describes a Beverage antenna?

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

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should not be installed in a wet area
B	It should be installed such that it is protected against unauthorized access
C	It should limited to 10 feet in height
D	It should not be installed higher than you can reach

35. - G0B02

What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?

Select	Answer
A	AWG number 16
B	AWG number 8
C	AWG number 12
D	AWG number 20