Ham Extra License Practice Quiz
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E0A03: Which of the following would be a practical way to estimate whether the RF fields produced by an amateur radio station are within permissible MPE limits?
Use a calibrated antenna analyzer
Use a hand calculator plus Smith-chart equations to calculate the fields
Use an antenna modeling program to calculate field strength at accessible locations
All of the choices are correct
E1A04: With your transceiver displaying the carrier frequency of phone signals, you hear a DX station calling CQ on 3.601 MHz LSB. Is it legal to return the call using lower sideband on the same frequency?
Yes, because the DX station initiated the contact
Yes, because the displayed frequency is within the 75 meter phone band segment
No, my sidebands will extend beyond the edge of the phone band segment
No, USA stations are not permitted to use phone emissions below 3.610 MHz
E1B07: Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
At the lowest frequency of the channel
At the center frequency of the channel
At the highest frequency of the channel
On any frequency where the signal's sidebands are within the channel
E1C10: What types of amateur stations may automatically retransmit the radio signals of other amateur stations?
Only beacon, repeater or space stations
Only auxiliary, repeater or space stations
Only earth stations, repeater stations or model craft
Only auxiliary, beacon or space stations
E1D07: Which amateur service HF bands have frequencies authorized to space stations?
Only 40m, 20m, 17m, 15m, 12m and 10m
Only 40m, 20m, 17m, 15m and 10m bands
40m, 30m, 20m, 15m, 12m and 10m bands
All HF bands
E1E01: What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?
5
2
4
3
E1F08: Which of the following types of amateur station communications are prohibited?
Communications transmitted for hire or material compensation, except as otherwise provided in the rules
Communications that have a political content, except as allowed by the Fairness Doctrine
Communications that have a religious content
Communications in a language other than English
E2A05: What do the letters in a satellite's mode designator specify?
Power limits for uplink and downlink transmissions
The location of the ground control station
The polarization of uplink and downlink signals
The uplink and downlink frequency ranges
E2B16: Which of the following is the video standard used by North American Fast Scan ATV stations?
PAL
DRM
Scottie
NTSC
E2C02: Which of the following best describes the term "self-spotting" in regards to contest operating?
The generally prohibited practice of posting one's own call sign and frequency on a call sign spotting network
The acceptable practice of manually posting the call signs of stations on a call sign spotting network
A manual technique for rapidly zero beating or tuning to a station's frequency before calling that station
An automatic method for rapidly zero beating or tuning to a station's frequency before calling that station
E2D02: What is the definition of baud?
The number of data symbols transmitted per second
The number of characters transmitted per second
The number of characters transmitted per minute
The number of words transmitted per minute
E2E10: Which of these digital communications modes has the narrowest bandwidth?
MFSK16
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
E3A05: Which of the following describes a method of establishing EME contacts?
Time synchronous transmissions with each station alternating
Storing and forwarding digital messages
Judging optimum transmission times by monitoring beacons from the Moon
High speed CW identification to avoid fading
E3B08: What type of HF propagation is probably occurring if radio signals travel along the terminator between daylight and darkness?
Transequatorial
Sporadic-E
Long-path
Gray-line
E3C09: Which of the following is usually responsible for causing VHF signals to propagate for hundreds of miles?
D-region absorption
Faraday rotation
Tropospheric ducting
Ground wave
E4A01: How does a spectrum analyzer differ from an oscilloscope?
A spectrum analyzer measures ionospheric reflection; an oscilloscope displays electrical signals
A spectrum analyzer displays the peak amplitude of signals; an oscilloscope displays the average amplitude of signals
A spectrum analyzer displays signals in the frequency domain; an oscilloscope displays signals in the time domain
A spectrum analyzer displays radio frequencies; an oscilloscope displays audio frequencies
E4B15: Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?
The inductance to capacitance ratio
The frequency shift
The bandwidth of the circuit's frequency response
The resonant frequency of the circuit
E4C15: What is the primary source of noise that can be heard from an HF receiver with an antenna connected?
Detector noise
Induction motor noise
Receiver front-end noise
Atmospheric noise
E4D10: What does a third-order intercept level of 40 dBm mean with respect to receiver performance?
Signals less than 40 dBm will not generate audible third-order intermodulation products
The receiver can tolerate signals up to 40 dB above the noise floor without producing third-order intermodulation products
A pair of 40 dBm signals will theoretically generate a third-order intermodulation product with the same level as the input signals
A pair of 1 mW input signals will produce a third-order intermodulation product which is 40 dB stronger than the input signal
E4E05: How can noise from an electric motor be suppressed?
By installing a high pass filter in series with the motor's power leads
By installing a brute-force AC-line filter in series with the motor leads
By installing a bypass capacitor in series with the motor leads
By using a ground-fault current interrupter in the circuit used to power the motor
E5A08: What is the phase relationship between the current through and the voltage across a series resonant circuit at resonance?
The voltage leads the current by 90 degrees
The current leads the voltage by 90 degrees
The voltage and current are in phase
The voltage and current are 180 degrees out of phase
E5B01: What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage?
An exponential rate of one
One time constant
One exponential period
A time factor of one
E5C15: In polar coordinates, what is the impedance of a circuit of 100 -j100 ohms impedance?
141 ohms at an angle of -45 degrees
100 ohms at an angle of 45 degrees
100 ohms at an angle of -45 degrees
141 ohms at an angle of 45 degrees
E5D09: What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?
It is dissipated as heat in the circuit
It is repeatedly exchanged between the associated magnetic and electric fields, but is not dissipated
It is dissipated as kinetic energy in the circuit
It is dissipated in the formation of inductive and capacitive fields
E6A11: In Figure E6-2, what is the schematic symbol for a P-channel junction FET?
1
2
3
6
E6B08: Which of the following describes a type of semiconductor diode?
Metal-semiconductor junction
Electrolytic rectifier
CMOS-field effect
Thermionic emission diode
E6C06: Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?
Larger bypass capacitors are used in CMOS circuit design
The input switching threshold is about two times the power supply voltage
The input switching threshold is about one-half the power supply voltage
Input signals are stronger
E6D07: What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?
From a few kHz to no more than 30 MHz
From less than 20 Hz to approximately 300 MHz
From approximately 10 Hz to no more than 3000 kHz
From about 100 kHz to at least 1000 GHz
E6E06: What characteristics of the MMIC make it a popular choice for VHF through microwave circuits?
The ability to retrieve information from a single signal even in the presence of other strong signals.
Plate current that is controlled by a control grid
Nearly infinite gain, very high input impedance, and very low output impedance
Controlled gain, low noise figure, and constant input and output impedance over the specified frequency range
E6F06: Which of these materials is affected the most by photoconductivity?
A crystalline semiconductor
An ordinary metal
A heavy metal
A liquid semiconductor
E7A12: What is the name for logic which represents a logic "0" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B06: Which of the following amplifier types reduces or eliminates even-order harmonics?
Push-push
Push-pull
Class C
Class AB
E7C05: Which filter type is described as having ripple in the passband and a sharp cutoff?
A Butterworth filter
An active LC filter
A passive op-amp filter
A Chebyshev filter
E7D13: What is the purpose of D1 in the circuit shown in Figure E7-3?
To provide line voltage stabilization
To provide a voltage reference
Peak clipping
Hum filtering
E7E08: What are the principal frequencies that appear at the output of a mixer circuit?
Two and four times the original frequency
The sum, difference and square root of the input frequencies
The two input frequencies along with their sum and difference frequencies
1.414 and 0.707 times the input frequency
E7F11: What is an advantage of a period-measuring frequency counter over a direct-count type?
It can run on battery power for remote measurements
It does not require an expensive high-precision time base
It provides improved resolution of low-frequency signals within a comparable time period
It can directly measure the modulation index of an FM transmitter
E7G15: What is the typical output impedance of an integrated circuit op-amp?
Very low
Very high
100 ohms
1000 ohms
E7H06: Which of the following oscillator circuits are commonly used in VFOs?
Pierce and Zener
Colpitts and Hartley
Armstrong and deForest
Negative feedback and balanced feedback
E8A01: What type of wave is made up of a sine wave plus all of its odd harmonics?
A square wave
A sine wave
A cosine wave
A tangent wave
E8B09: What is meant by deviation ratio?
The ratio of the audio modulating frequency to the center carrier frequency
The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency
The ratio of the carrier center frequency to the audio modulating frequency
The ratio of the highest audio modulating frequency to the average audio modulating frequency
E8C02: What are some of the differences between the Baudot digital code and ASCII?
Baudot uses four data bits per character, ASCII uses seven or eight; Baudot uses one character as a shift code, ASCII has no shift code
Baudot uses five data bits per character, ASCII uses seven or eight; Baudot uses two characters as shift codes, ASCII has no shift code
Baudot uses six data bits per character, ASCII uses seven or eight; Baudot has no shift code, ASCII uses two characters as shift codes
Baudot uses seven data bits per character, ASCII uses eight; Baudot has no shift code, ASCII uses two characters as shift codes
E8D08: Which of the following best describes electromagnetic waves traveling in free space?
Electric and magnetic fields become aligned as they travel
The energy propagates through a medium with a high refractive index
The waves are reflected by the ionosphere and return to their source
Changing electric and magnetic fields propagate the energy
E9A12: Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3-30 MHz range?
The standing-wave ratio
Distance from the transmitter
Soil conductivity
Take-off angle
E9B14: What type of information can be obtained by submitting the details of a proposed new antenna to a modeling program?
SWR vs. frequency charts
Polar plots of the far-field elevation and azimuth patterns
Antenna gain
All of these choices are correct
E9C02: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?
A cardioid
A figure-8 end-fire along the axis of the array
A figure-8 broadside to the axis of the array
Omnidirectional
E9D15: Which of the following would provide the best RF ground for your station?
A 50-ohm resistor connected to ground
An electrically-short connection to a metal water pipe
An electrically-short connection to 3 or 4 interconnected ground rods driven into the Earth
An electrically-short connection to 3 or 4 interconnected ground rods via a series RF choke
E9E06: 3-element Yagi?
Pi network
Pi-L network
L network
Parallel-resonant tank
E9F06: What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically one-half wavelength long at 14.10 MHz?
15 meters
20 meters
10 meters
71 meters
E9G07: On the Smith chart shown in Figure E9-3, what is the only straight line shown?
The reactance axis
The current axis
The voltage axis
The resistance axis
E9H07: Why is it advisable to use an RF attenuator on a receiver being used for direction finding?
It narrows the bandwidth of the received signal to improve signal to noise ratio
It compensates for the effects of an isotropic antenna, thereby improving directivity
It reduces loss of received signals caused by antenna pattern nulls, thereby increasing sensitivity
It prevents receiver overload which could make it difficult to determine peaks or nulls
