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. - G1A13

What is the appropriate action if, when operating on either the 30-meter or 60-meter bands, a station in the primary service interferes with your contact?

Select	Answer
A	Attempt to contact the station and request that it stop the interference
B	Notify the FCCs regional Engineer in Charge of the interference
C	Move to a clear frequency or stop transmitting
D	Increase your transmitter's power to overcome the interference

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	Only "Q" signals are permitted
B	They may be used if they do not obscure the meaning of a message
C	Only "10 codes" are permitted
D	They are not permitted

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

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

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	On any General or Technician Class band segment
B	Only on the Technician band segments until your license arrives in the mail
C	Only the Technician band segments until your upgrade is posted in the FCC database
D	On any General or Technician Class band segment except 30-meters and 60-meters

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

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	Lower sideband
B	Double sideband
C	Vestigial sideband
D	Upper sideband

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
B	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
C	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
D	Listen for 2 minutes before calling CQ

8. - G2C02

What should you do if a CW station sends "QRS"?

Select	Answer
A	Change frequency
B	Send slower
C	Increase your power
D	Repeat everything twice

9. - G2D08

What is a reason why many amateurs keep a station log?

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

10. - G2E02

How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?

Select	Answer
A	Transmit UI packets several times and wait to see if there is a response from another PACTOR station
B	Send the message: "Is this frequency in use?"
C	Unplug the data connector temporarily and see if the channel-busy indication is turned off
D	Put the modem or controller in a mode which allows monitoring communications without a connection

11. - G3A04

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

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

12. - G3B10

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the E region?

Select	Answer
A	2,500 miles
B	12,000 miles
C	1,200 miles
D	180 miles

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	Propagation is through ground waves which absorb most of the signal energy
C	Propagations is through ducts in F region which absorb most of the energy
D	Only a small part of the signal energy is scattered into the skip zone

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Excessive drive power
B	Insufficient drive power
C	Low input SWR
D	Shorting the input signal to ground

15. - G4B14

What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

Select	Answer
A	When testing logic circuits
B	When adjusting tuned circuits
C	When high precision is desired
D	When measuring the frequency of an oscillator

16. - G4C11

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

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

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz above the edge of the segment
B	Your displayed carrier frequency may be set at the edge of the segment
C	At least 1 kHz above the edge of the segment
D	At least 3 kHz below the edge of the segment

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The wire gauge of the DC power line to the transceiver
B	"Picket Fencing" signal variation
C	The antenna system
D	FCC rules limiting mobile output power on the 75-meter band

19. - G5A13

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A length of transmission line
B	A transformer
C	A Pi-network
D	All of these choices are correct

20. - G5B13

What is the output PEP of an unmodulated carrier if an average reading wattmeter connected to the transmitter output indicates 1060 watts?

Select	Answer
A	1060 watts
B	2120 watts
C	1500 watts
D	530 watts

21. - G5C17

What is the value in nanofarads (nF) of a 22,000 pF capacitor?

Select	Answer
A	220 nF
B	0.22 nF
C	2.2 nF
D	22 nF

22. - G6A08

Why must the cases of some large power transistors be insulated from ground?

Select	Answer
A	To avoid shorting the collector or drain voltage to ground
B	To improve the power dissipation capability
C	To reduce stray capacitance
D	To increase the beta of the transistor

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Longer life
B	Faster response time
C	All of these choices are correct
D	Lower power consumption

24. - G7A03

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

Select	Answer
A	Equal to the normal peak output voltage of the power supply
B	Double 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. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input 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	Add the RF input power to the DC output power

26. - G7C03

What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?

Select	Answer
A	IF amplifier
B	Mixer
C	Balanced modulator
D	Detector

27. - G8A08

Which of the following is an effect of overmodulation?

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

28. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To allow time for the other station to break in during a transmission
B	Some modes have high duty cycles which could exceed the transmitter's average power rating.
C	All of these choices are correct
D	To aid in tuning your transmitter

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It sends the packet back to the transmitting station
B	It requests the packet be retransmitted
C	It terminates the contact
D	It requests a change in transmitting protocol

30. - G9A14

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

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

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It increases
B	It reaches a maximum at an angle of 45 degrees
C	It decreases
D	It stays the same

32. - G9C20

What is meant by the terms dBi and dBd when referring to antenna gain?

Select	Answer
A	dBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna
B	dBi refers to an isometric antenna, dBd refers to a discone antenna
C	dBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna
D	dBi refers to an isotropic antenna, dBd refers to a dipole antenna

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Near Vertical Incidence sky-wave
B	Nearly Vertical Inductance System
C	Non-Varying Impedance Smoothing
D	Non-Varying Indicated SWR

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	A lower transmitter duty cycle permits greater short-term exposure levels
B	A higher transmitter duty cycle permits greater short-term exposure levels
C	High duty cycle transmitters are exempt from RF exposure requirements
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

35. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	Unground the base of the tower
B	Make sure all circuits that supply power to the tower are locked out and tagged
C	All of these choices are correct
D	Notify the electric company that a person will be working on the tower