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. - G1A07

Which of the following frequencies is within the General Class portion of the 20-meter phone band?

Select	Answer
A	14305 kHz
B	14405 kHz
C	14005 kHz
D	14105 kHz

2. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	20 watts PEP output
B	10 watts PEP output
C	200 watts PEP output
D	100 watts PEP output

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

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

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	General and Technician
B	Technician only
C	Extra, General and Technician
D	General only

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Locally controlled station
B	Automatically controlled digital station
C	Robotically controlled station
D	Fail-safe digital station

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

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

7. - G2B05

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

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

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Matching your transmit frequency to the frequency of a received signal
B	Matching the speed of the transmitting station
C	Sending without error
D	Operating split to avoid interference on frequency

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Hunters have an opportunity to transmit on non-amateur frequencies
B	Direction finding used to locate stations violating FCC Rules
C	Identification of out of band operation
D	Identification of different call signs

10. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Send a NAK response continuously so that the sending station has to pause
C	Joining an existing contact is not possible, PACTOR connections are limited to two stations
D	Transmit a steady carrier until the PACTOR protocol times out and disconnects

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

Select	Answer
A	15 meters, 12 meters and 10 meters
B	60 meters and 40 meters
C	80 meters and 160 meters
D	30 meters and 20 meters

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are completely absorbed by the ionosphere
C	They are bent back to the Earth
D	They are bent and trapped in the ionosphere to circle the Earth

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The long path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
C	The short path azimuth of a distant station
D	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions

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 pronounced dip
B	No change will be observed
C	A pronounced peak
D	A slow, rhythmic oscillation

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

16. - G4C09

How can a ground loop be avoided?

Select	Answer
A	Connect the AC neutral conductor to the ground wire
B	Avoid using lock washers and star washers when making ground connections
C	Connect all ground conductors in series
D	Connect all ground conductors to a single point

17. - G4D01

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

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

18. - G4E07

Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?

Select	Answer
A	The fuel delivery system
B	The battery charging system
C	The vehicle control computer
D	All of these choices are correct

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To minimize radiation resistance
B	To minimize transmitter power output
C	To reduce power supply ripple
D	To maximize the transfer of power

20. - G5B03

How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?

Select	Answer
A	400 watts
B	0.5 watts
C	3200 watts
D	200 watts

21. - G5C02

What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?

Select	Answer
A	The transformer no longer functions as it is a unidirectional device
B	The secondary voltage becomes 4 times the primary voltage
C	Additional resistance must be added in series with the primary to prevent overload
D	Additional resistance must be added in parallel with the secondary to prevent overload

22. - G6A17

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

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

23. - G6B10

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

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

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	Two times the normal peak output voltage of the power supply
B	One-half the normal peak output voltage of the power supply
C	One-half the normal output voltage of the power supply
D	Equal to the normal output voltage of the power supply

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class B
B	Class C
C	Class A
D	Class AB

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	RF amplifier
B	Filter
C	Carrier oscillator
D	IF amplifier

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's automatic level control (ALC) is properly adjusted
B	Signal distortion caused by insufficient collector current
C	Signal distortion caused by excessive drive
D	The transmitter's carrier is properly suppressed

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It results in the best signal to noise ratio
B	It improves impedance matching of the antenna
C	It minimizes power consumption in the receiver
D	It is required by FCC rules

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	RTTY
B	JT9 and JT65
C	FSK441 and Hellschreiber
D	Clover

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	75 ohms
B	100 ohms
C	300 ohms
D	50 ohms

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	263 feet
B	131 feet
C	84 feet
D	42 feet

32. - G9C19

How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	dBi gain figures are the same as the square root of dBd gain figures multiplied by 2.15
B	dBi gain figures are 2.15 dB higher than dBd gain figures
C	dBi gain figures are the reciprocal of dBd gain figures + 2.15 dB
D	dBi gain figures are 2.15 dB lower then dBd gain figures

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	It has poor directivity
B	It has high losses compared to other types of antennas
C	Its impedance is too low for effective matching
D	All of these choices are correct

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It cools body tissue
B	It heats body tissue
C	It causes the blood count to reach a dangerously low level
D	It causes radiation poisoning

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	60 amperes
C	100 amperes
D	30 amperes