Which HF bands have segments exclusively allocated to Amateur Extra licensees?

1. AAll HF bands
2. B80 meters, 40 meters, 20 meters, and 15 meters
3. CAll HF bands except 160 meters and 10 meters
4. D60 meters, 30 meters, 17 meters, and 12 meters

Which of the following one-way transmissions are permitted?

1. AUnidentified test transmissions of less than 10 seconds in duration
2. BTransmissions to assist with learning the International Morse code
3. CRegular transmissions offering equipment for sale, if intended for amateur radio use
4. DAll these choices are correct

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

1. A2.8 kHz
2. B5.6 kHz
3. C1.8 kHz
4. D3 kHz

Volunteer Examiners are accredited by what organization?

1. AThe Federal Communications Commission
2. BThe Universal Licensing System
3. CA Volunteer Examiner Coordinator
4. DThe Wireless Telecommunications Bureau

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

1. AOn any band segment where digital operation is permitted
2. BAnywhere in the non-phone segments of the 10-meter or shorter wavelength bands
3. COnly in the non-phone Extra Class segments of the bands
4. DAnywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

1. AVery high-fidelity voice modulation
2. BLess subject to interference from atmospheric static crashes
3. CEase of tuning on receive and immunity to impulse noise
4. DLess bandwidth used and greater power efficiency

Which of the following is good amateur practice for net management?

1. AAlways use multiple sets of phonetics during check-in
2. BHave a backup frequency in case of interference or poor conditions
3. CTransmit the full net roster at the beginning of every session
4. DAll these choices are correct

Which of the following describes full break-in CW operation (QSK)?

1. ABreaking stations send the Morse code prosign "BK"
2. BAutomatic keyers, instead of hand keys, are used to send Morse code
3. CAn operator must activate a manual send/receive switch before and after every transmission
4. DTransmitting stations can receive between code characters and elements

Which of the following is required when participating in a contest on HF frequencies?

1. ASubmit a log to the contest sponsor
2. BSend a QSL card to the stations worked, or QSL via Logbook of The World
3. CIdentify your station according to normal FCC regulations
4. DAll these choices are correct

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

1. AThe mark and space frequencies may be reversed
2. BYou may have selected the wrong baud rate
3. CYou may be listening on the wrong sideband
4. DAll these choices are correct

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

1. AAt the summer solstice
2. BOnly at the maximum point
3. COnly at the minimum point
4. DAt any point

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

1. AThey are refracted back to Earth
2. BThey pass through the ionosphere
3. CThey are amplified by interaction with the ionosphere
4. DThey are refracted and trapped in the ionosphere to circle Earth

Why are HF scatter signals in the skip zone usually weak?

1. AOnly a small part of the signal energy is scattered into the skip zone
2. BSignals are scattered from the magnetosphere, which is not a good reflector
3. CPropagation is via ground waves, which absorb most of the signal energy
4. DPropagation is via ducts in the F region, which absorb most of the energy

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

1. AMinimum SWR on the antenna
2. BMinimum plate current without exceeding maximum allowable grid current
3. CHighest plate voltage while minimizing grid current
4. DDesired power output without exceeding maximum allowable plate current

Why do voltmeters have high input impedance?

1. AIt improves the frequency response
2. BIt allows for higher voltages to be safely measured
3. CIt improves the resolution of the readings
4. DIt decreases the loading on circuits being measured

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

1. AOn-and-off humming or clicking
2. BA CW signal at a nearly pure audio frequency
3. CA chirpy CW signal
4. DSeverely distorted audio

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

1. A7.178 MHz to 7.181 MHz
2. B7.178 MHz to 7.184 MHz
3. C7.175 MHz to 7.178 MHz
4. D7.1765 MHz to 7.1795 MHz

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

1. A0.02 VDC
2. B0.5 VDC
3. C0.2 VDC
4. D1.38 VDC

How does an inductor react to AC?

1. AAs the frequency of the applied AC increases, the reactance decreases
2. BAs the amplitude of the applied AC increases, the reactance increases
3. CAs the amplitude of the applied AC increases, the reactance decreases
4. DAs the frequency of the applied AC increases, the reactance increases

What is the RMS voltage of a sine wave with a value of 17 volts peak?

1. A8.5 volts
2. B12 volts
3. C24 volts
4. D34 volts

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

1. A576.9 nanofarads
2. B1,733 picofarads
3. C3,583 picofarads
4. D10.750 nanofarads

Which of the following is characteristic of low voltage ceramic capacitors?

1. ATight tolerance
2. BHigh stability
3. CHigh capacitance for given volume
4. DComparatively low cost

How is an LED biased when emitting light?

1. AIn the tunnel-effect region
2. BAt the Zener voltage
3. CReverse biased
4. DForward biased

What is the function of a power supply bleeder resistor?

1. AIt acts as a fuse for excess voltage
2. BIt discharges the filter capacitors when power is removed
3. CIt removes shock hazards from the induction coils
4. DIt eliminates ground loop current

What is the purpose of neutralizing an amplifier?

1. ATo limit the modulation index
2. BTo eliminate self-oscillations
3. CTo cut off the final amplifier during standby periods
4. DTo keep the carrier on frequency

Which of these functions is performed by software in a software-defined radio (SDR)?

1. AFiltering
2. BDetection
3. CModulation
4. DAll these choices are correct

What is meant by the term "flat-topping," when referring to an amplitude-modulated phone signal?

1. ASignal distortion caused by insufficient collector current
2. BThe transmitter's automatic level control (ALC) is properly adjusted
3. CSignal distortion caused by excessive drive or speech levels
4. DThe transmitter's carrier is properly suppressed

What combination of a mixer's Local Oscillator (LO) and RF input frequencies is found in the output?

1. AThe ratio
2. BThe average
3. CThe sum and difference
4. DThe arithmetic product

Which of the following describes a waterfall display?

1. AFrequency is horizontal, signal strength is vertical, time is intensity
2. BFrequency is vertical, signal strength is intensity, time is horizontal
3. CFrequency is horizontal, signal strength is intensity, time is vertical
4. DFrequency is vertical, signal strength is horizontal, time is intensity

What must be done to prevent standing waves on a feed line connected to an antenna?

1. AThe antenna feed point must be at DC ground potential
2. BThe feed line must be an odd number of electrical quarter wavelengths long
3. CThe feed line must be an even number of physical half wavelengths long
4. DThe antenna feed point impedance must be matched to the characteristic impedance of the feed line

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

1. AIf the antenna is too high, the pattern becomes unpredictable
2. BAntenna height has no effect on the pattern
3. CIf the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
4. DIf the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated

What does "front-to-back ratio" mean in reference to a Yagi antenna?

1. AThe number of directors versus the number of reflectors
2. BThe relative position of the driven element with respect to the reflectors and directors
3. CThe power radiated in the major lobe compared to that in the opposite direction
4. DThe ratio of forward gain to dipole gain

What is the primary use of a Beverage antenna?

1. ADirectional receiving for MF and low HF bands
2. BDirectional transmitting for low HF bands
3. CPortable direction finding at higher HF frequencies
4. DPortable direction finding at lower HF frequencies

What is the effect of modulation duty cycle on RF exposure?

1. AA lower duty cycle permits greater power levels to be transmitted
2. BA higher duty cycle permits greater power levels to be transmitted
3. CLow duty cycle transmitters are exempt from RF exposure evaluation requirements
4. DHigh duty cycle transmitters are exempt from RF exposure requirements

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

1. ACurrent flowing from one or more of the hot wires to the neutral wire
2. BCurrent flowing from one or more of the hot wires directly to ground
3. COvervoltage on the hot wires
4. DAll these choices are correct