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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
B	Amateur stations are allowed to use the band only during emergencies
C	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event
B	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
C	All of these choices are correct
D	The FCC must have declared a state of emergency

3. - G1C03

What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	5.6 kHz
B	3 kHz
C	1.8 kHz
D	2.8 kHz

4. - G1D04

Which of the following is a requirement for administering a Technician Class license examination?

Select	Answer
A	At least two General Class or higher VEs must be present, but only one need be Extra Class
B	At least three General Class or higher VEs must observe the examination
C	At least two General Class or higher VEs must be present
D	At least three VEs of Technician Class or higher must observe the examination

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	When messages are encrypted
B	When under automatic control
C	When messages are not encrypted
D	Under no circumstances

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Because it is fully compatible with an AM detector
C	Lower sideband is more efficient than upper sideband at these frequencies
D	Current amateur practice is to use lower sideband on these frequency bands

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

8. - G2C02

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

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

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows accurate land masses
B	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
C	A map that shows true bearings and distances from a particular location
D	A map that shows the angle at which an amateur satellite crosses the equator

10. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may be listening on the wrong sideband
B	The mark and space frequencies may be reversed
C	You may have selected the wrong baud rate
D	All of these choices are correct

11. - G3A10

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

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

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

Select	Answer
A	Select a frequency just above the LUF
B	Select a frequency just below the MUF
C	Select a frequency just above the critical frequency
D	Select a frequency just below the critical frequency

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 rising
C	Where the Sun is overhead
D	Where the Sun is on the opposite side of the Earth

14. - G4A02

What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

Select	Answer
A	It may be possible to reduce or eliminate interference from other signals
B	Accidental out of band operation can be prevented
C	More stations can be accommodated within a given signal passband
D	Interference from impulse noise will be eliminated

15. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	A signal generator
B	An ammeter
C	An ohmmeter
D	An oscilloscope

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding shunt inductors to the conductors
B	Placing a ferrite choke around the cable
C	Adding an additional insulating jacket to the cable
D	Adding series capacitors to the conductors

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

Select	Answer
A	It increases average power
B	It reduces harmonic distortion
C	It reduces intermodulation distortion
D	It increases peak power

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	All of these choices are correct
C	The battery charging system
D	The vehicle control computer

19. - G5A07

What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?

Select	Answer
A	No current can flow through the circuit
B	The electrical load is shorted
C	The source can deliver maximum power to the load
D	The source delivers minimum power to the load

20. - G5B05

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

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

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	10.750 nanofarads
C	576.9 nanofarads
D	1733 picofarads

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. - G6B15

What is the main reason to use keyed connectors instead of non-keyed types?

Select	Answer
A	Prevention of use by unauthorized persons
B	All of these choices are correct
C	Reduced chance of incorrect mating
D	Higher current carrying capacity

24. - G7A12

Which symbol in Figure G7-1 represents a multiple-winding transformer?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 1
D	Symbol 4

25. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	All of these choices are correct
B	SSB
C	CW
D	AM

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	IF filter
B	RF oscillator
C	Balanced modulator
D	Product detector

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

28. - G8B05

What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

Select	Answer
A	2300 Hz
B	31.5 Hz
C	500 Hz
D	1800 Hz

29. - G8C01

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

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

30. - G9A06

In what units is RF feed line loss usually expressed?

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

31. - G9B11

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

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

32. - G9C06

What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?

Select	Answer
A	There must be an open circuit in the driven element at the point opposite the feed point
B	The reflector element must be approximately 5 percent longer than the driven element
C	The reflector element must be approximately 5 percent shorter than the driven element
D	The driven element must be fed with a balun transformer

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	High vertical angle radiation for working stations within a radius of a few hundred kilometers
B	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
C	High forward gain
D	All of these choices are correct

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 limited to 10 feet in height
C	It should not be installed higher than you can reach
D	It should be installed such that it is protected against unauthorized access

35. - G0B05

Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?

Select	Answer
A	All of these choices are correct
B	Current flowing from one or more of the voltage-carrying wires directly to ground
C	Current flowing from one or more of the voltage-carrying wires to the neutral wire
D	Overvoltage on the voltage-carrying wires

Figure G7-1