Anonymous User

Hamboozler

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?

SelectAnswer
AAll these choices are correct
BPerform a routine RF exposure evaluation and prevent access to any identified high exposure areas
CNotify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels
DPost a copy of FCC Part 97.13 in the station

2. - G0B10

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

SelectAnswer
AHigh voltages can cause lead-tin solder to disintegrate suddenly
BRF energy can convert the lead into a poisonous gas
CLead can contaminate food if hands are not washed carefully after handling the solder
DTin in the solder can “cold flow,” causing shorts in the circuit

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

SelectAnswer
A21.275 MHz to 21.300 MHz
BAll these choices are correct
C28.000 MHz to 28.025 MHz
D7.125 MHz to 7.175 MHz

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

SelectAnswer
AOnly when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
BOnly when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
COnly when the foreign country has a formal third-party agreement filed with the FCC
DWhen the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

5. - G1C07

What must be done before using a new digital protocol on the air?

SelectAnswer
AType-certify equipment to FCC standards
BObtain an experimental license from the FCC
CPublicly document the technical characteristics of the protocol
DSubmit a rule-making proposal to the FCC describing the codes and methods of the technique

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

SelectAnswer
A18 years
BThere is no age limit
C16 years
D21 years

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

SelectAnswer
A100 milliwatts
B100 watts
C10 watts
D1500 watts

8. - G2A12

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

SelectAnswer
ARF clipping level
BTransmit audio or microphone gain
CAntenna inductance or capacitance
DAttenuator level

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

SelectAnswer
AFollow the voluntary band plan
BAll these choices are correct
CListen on the frequency for at least two minutes to be sure it is clear
DIdentify your station by transmitting your call sign at least 3 times

10. - G2C04

What does the Q signal “QRL?” mean?

SelectAnswer
A“Are you operating full break-in?” or “Can you operate full break-in?”
B“Are you busy?” or “Is this frequency in use?”
C“Will you keep the frequency clear?”
D“Are you listening only for a specific station?”

11. - G2D08

Why do many amateurs keep a station log?

SelectAnswer
AThe FCC requires a log of all international third-party traffic
BThe log provides evidence of operation needed to renew a license without retest
CTo help with a reply if the FCC requests information about your station
DThe FCC requires a log of all international contacts

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

SelectAnswer
A170 Hz
B85 Hz
C425 Hz
D850 Hz

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

SelectAnswer
AVHF/UHF ducting is disturbed
BHF communication is improved
CVHF/UHF ducting is improved
DHF communication is disturbed

14. - G3B08

What does MUF stand for?

SelectAnswer
AThe Maximum Usable Frequency for communications between two points
BThe Minimum Usable Frequency for communications between two points
CThe Minimum Usable Frequency during a 24-hour period
DThe Maximum Usable Frequency during a 24-hour period

15. - G3C07

What makes HF scatter signals often sound distorted?

SelectAnswer
AThe ionospheric region involved is unstable
BEnergy is scattered into the skip zone through several different paths
CThe E region is not present
DGround waves are absorbing much of the signal

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

SelectAnswer
ATo balance the transmitter audio frequency response
BTo prevent excessive drive
CTo increase overall efficiency
DTo reduce harmonic radiation

17. - G4B13

Which of the following can be measured with an antenna analyzer?

SelectAnswer
APower output from a transmitter
BFront-to-back ratio of an antenna
CImpedance of coaxial cable
DGain of a directional antenna

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

SelectAnswer
AUsing surge suppressor power outlets
BBonding all equipment enclosures together
CBuilding all equipment in a metal enclosure
DPlacing low-pass filters on all feed lines

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

SelectAnswer
AAll these choices are correct
BExcess intermodulation products
CExcessive background noise
DDistorted speech

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

SelectAnswer
ATo increase the power handling capacity of a whip antenna
BTo electrically lengthen a physically short antenna
CTo reduce radiation resistance
DTo lower the radiation angle

21. - G5A06

How does a capacitor react to AC?

SelectAnswer
AAs the frequency of the applied AC increases, the reactance decreases
BAs the amplitude of the applied AC increases, the reactance decreases
CAs the frequency of the applied AC increases, the reactance increases
DAs the amplitude of the applied AC increases, the reactance increases

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

SelectAnswer
AApproximately 61 milliwatts
BApproximately 11 milliwatts
CApproximately 61 watts
DApproximately 11 watts

23. - G5C03

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

SelectAnswer
A0.17 ohms
B80 ohms
C5.9 ohms
D17 ohms

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

SelectAnswer
A10.5 volts
B8.5 volts
C12 volts
D6 volts

25. - G6B08

How is an LED biased when emitting light?

SelectAnswer
AForward biased
BReverse biased
CAt the Zener voltage
DIn the tunnel-effect region

26. - G7A02

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

SelectAnswer
AAll these choices are correct
BTransformers and transducers
CCapacitors and inductors
DDiodes

27. - G7B06

What is a shift register?

SelectAnswer
AA digital mixer
BA clocked array of circuits that passes data in steps along the array
CAn analog mixer
DAn array of operational amplifiers used for tri-state arithmetic operations

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

SelectAnswer
ARolloff frequency
BCutoff frequency
CNotch frequency
DNeper frequency

29. - G8A12

What is QPSK modulation?

SelectAnswer
AModulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
BModulation using quadra-pole sideband keying to generate spread spectrum signals
CModulation using quasi-parallel to serial conversion to reduce bandwidth
DModulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits

30. - G8B08

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

SelectAnswer
ASome modes have high duty cycles that could exceed the transmitter’s average power rating
BTo aid in tuning your transmitter
CTo prevent overmodulation
DTo allow time for the other station to break in during a transmission

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

SelectAnswer
AFT8
BMFSK32
CAMTOR
DMSK144

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

SelectAnswer
ABetween 1:1 and 5:1 depending on the reflected power at the transmitter
BBetween 1:1 and 5:1 depending on the characteristic impedance of the line
C1:1
D5:1

33. - G9B10

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

SelectAnswer
A33 feet
B8 feet
C24 feet
D16 feet

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

SelectAnswer
AAll these choices are correct
BIt does not require any inductors or capacitors
CIt is useful for matching multiband antennas
DIt does not require the driven element to be insulated from the boom

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

SelectAnswer
ABroadside to the plane of the halo
BOn the same side as the feed point
COpposite the feed point
DOmnidirectional in the plane of the halo