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. - G1A05

Which of the following frequencies is in the General Class portion of the 40-meter band?

Select	Answer
A	7.500 MHz
B	40.200 MHz
C	40.500 MHz
D	7.250 MHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only with Special Temporary Authorization from the FCC
B	Only when the information is of a routine, personal nature
C	To control a space station
D	During a declared communications emergency

3. - G1C02

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

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

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
B	Under no circumstances
C	Only if the 10-meter repeater control operator holds at least a General Class license
D	Only during an FCC declared general state of communications emergency

6. - G2A07

Which of the following statements is true of the single sideband voice mode?

Select	Answer
A	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
B	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands
C	Only one sideband and the carrier are transmitted; the other sideband is suppressed
D	Only one sideband is transmitted; the other sideband and carrier are suppressed

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Between 150 and 500 Hz
B	Approximately 10 kHz
C	Approximately 3 kHz
D	Approximately 6 kHz

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	BK
B	KN
C	SK
D	AR

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

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	RTTY
B	ARES
C	Winlink
D	Skywarn

11. - G3A11

Approximately how long is the typical sunspot cycle?

Select	Answer
A	8 minutes
B	40 hours
C	11 years
D	28 days

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Check the strength of TV signals from Western Europe
B	Check the strength of signals in the MF AM broadcast band
C	Listen for signals from an international beacon in the frequency range you plan to use
D	Send a series of dots on the band and listen for echoes from your signal

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

14. - G4A11

Which of the following is a use for the IF shift control on a receiver?

Select	Answer
A	To change frequency rapidly
B	To tune in stations that are slightly off frequency without changing your transmit frequency
C	To avoid interference from stations very close to the receive frequency
D	To permit listening on a different frequency from that on which you are transmitting

15. - G4B15

What type of transmitter performance does a two-tone test analyze?

Select	Answer
A	Linearity
B	Percentage of frequency modulation
C	Percentage of carrier phase shift
D	Percentage of suppression of carrier and undesired sideband for SSB

16. - G4C11

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

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

17. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 4 times
B	Approximately 8 times
C	Approximately 1.5 times
D	Approximately 2 times

18. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.5 VDC
B	0.2 VDC
C	0.02 VDC
D	1.38 VDC

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 frequency of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance increases

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 equals the sum of the currents through each branch
C	It decreases as more parallel branches are added to the circuit
D	It equals the average of each branch current

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	10000 ohms
C	0.17 ohms
D	5.9 ohms

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

23. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Mode Modulated Integrated Circuit
B	Monolithic Microwave Integrated Circuit
C	Military Manufactured Integrated Circuit
D	Multi Megabyte Integrated Circuit

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Capacitors and inductors
B	Diodes
C	Quartz crystals
D	Transformers and transducers

25. - G7B08

How is the efficiency of an RF power amplifier determined?

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

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	Carrier oscillator
B	RF amplifier
C	IF amplifier
D	Filter

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient audio
B	Insufficient bandwidth
C	Frequency drift
D	Excessive bandwidth

28. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Reactance modulator
B	Multiplier
C	Pre-emphasis network
D	Mixer

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By transmitting redundant information with the data
B	By controlling transmitter output power for optimum signal strength
C	By using the varicode character set
D	By using a parity bit with each character

30. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 100 feet
B	Ohms per 1000 feet
C	Decibels per 1000 feet
D	Decibels per 100 feet

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Shorten the radials
B	Slope the radials downward
C	Lengthen the radials
D	Slope the radials upward

32. - G9C08

What is meant by the "main lobe" of a directive antenna?

Select	Answer
A	The magnitude of the maximum vertical angle of radiation
B	The point of maximum current in a radiating antenna element
C	The maximum voltage standing wave point on a radiating element
D	The direction of maximum radiated field strength from the antenna

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To permit multiband operation
B	To notch spurious frequencies
C	To prevent out of band operation
D	To provide balanced feed point impedance

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	Wear a radiation badge
B	All of these choices are correct
C	Ensure that you and the antenna structure are grounded
D	Turn off the transmitter and disconnect the feed line

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Lead can contaminate food if hands are not washed carefully after handling the solder
B	RF energy can convert the lead into a poisonous gas
C	Tin in the solder can "cold flow" causing shorts in the circuit
D	High voltages can cause lead-tin solder to disintegrate suddenly