Ham Extra License Practice Quiz
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E0A02: When evaluating RF exposure levels from your station at a neighbor's home, what must you do?
Make sure signals from your station are less than the controlled MPE limits
Make sure signals from your station are less than the uncontrolled MPE limits
You need only evaluate exposure levels on your own property
Advise your neighbors of the results of your tests
E1A13: Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?
Only a person with an FCC Marine Radio
Any person holding an FCC-issued amateur license or who is authorized for alien reciprocal operation
Only a person named in an amateur station license grant
Any person named in an amateur station license grant or a person holding an unrestricted Radiotelephone Operator Permit
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
E1C02: What is meant by automatic control of a station?
The use of devices and procedures for control so that the control operator does not have to be present at a control point
A station operating with its output power controlled automatically
Remotely controlling a station's antenna pattern through a directional control link
The use of a control link between a control point and a locally controlled station
E1D01: What is the definition of the term telemetry?
One-way transmission of measurements at a distance from the measuring instrument
Two-way radiotelephone transmissions in excess of 1000 feet
Two-way single channel transmissions of data
One-way transmission that initiates, modifies, or terminates the functions of a device at a distance
E1E03: What is a Volunteer Examiner Coordinator?
A person who has volunteered to administer amateur operator license examinations
A person who has volunteered to prepare amateur operator license examinations
An organization that has entered into an agreement with the FCC to coordinate amateur operator license examinations
The person who has entered into an agreement with the FCC to be the VE session manager
E1F06: What is the National Radio Quiet Zone?
An area in Puerto Rico surrounding the Aricebo Radio Telescope
An area in New Mexico surrounding the White Sands Test Area
An area surrounding the National Radio Astronomy Observatory
An area in Florida surrounding Cape Canaveral
E2A11: What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?
A linearly polarized antenna
A circularly polarized antenna
An isotropic antenna
A log-periodic dipole array
E2B17: What is the approximate bandwidth of a slow-scan TV signal?
600 Hz
3 kHz
2 MHz
6 MHz
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
E2D03: Which of the following digital modes is especially useful for EME communications?
FSK441
PACTOR III
Olivia
JT65
E2E04: What is indicated when one of the ellipses in an FSK crossed-ellipse display suddenly disappears?
Selective fading has occurred
One of the signal filters has saturated
The receiver has drifted 5 kHz from the desired receive frequency
The mark and space signal have been inverted
E3A01: What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by Moon bounce?
500 miles, if the Moon is at perigee
2000 miles, if the Moon is at apogee
5000 miles, if the Moon is at perigee
12,000 miles, as long as both can "see" the Moon
E3B02: What is the approximate maximum range for signals using transequatorial propagation?
1000 miles
2500 miles
5000 miles
7500 miles
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
E4A11: Which of these instruments could be used for detailed analysis of digital signals?
Dip meter
Oscilloscope
Ohmmeter
Q meter
E4B10: Which of the following describes a method to measure intermodulation distortion in an SSB transmitter?
Modulate the transmitter with two non-harmonically related radio frequencies and observe the RF output with a spectrum analyzer
Modulate the transmitter with two non-harmonically related audio frequencies and observe the RF output with a spectrum analyzer
Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a peak reading wattmeter
Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a logic analyzer
E4C13: How does a narrow-band roofing filter affect receiver performance?
It improves sensitivity by reducing front end noise
It improves intelligibility by using low Q circuitry to reduce ringing
It improves dynamic range by attenuating strong signals near the receive frequency
All of these choices are correct
E4D02: Which of the following describes two problems caused by poor dynamic range in a communications receiver?
Cross-modulation of the desired signal and desensitization from strong adjacent signals
Oscillator instability requiring frequent retuning and loss of ability to recover the opposite sideband
Cross-modulation of the desired signal and insufficient audio power to operate the speaker
Oscillator instability and severe audio distortion of all but the strongest received signals
E4E01: Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?
Ignition noise
Broadband white noise
Heterodyne interference
All of these choices are correct
E5A03: What is the magnitude of the impedance of a series RLC circuit at resonance?
High, as compared to the circuit resistance
Approximately equal to capacitive reactance
Approximately equal to inductive reactance
Approximately equal to circuit resistance
E5B06: How long does it take for an initial charge of 800 V DC to decrease to 294 V DC in a 450-microfarad capacitor when a 1-megohm resistor is connected across it?
4.50 seconds
9 seconds
450 seconds
900 seconds
E5C03: In polar coordinates, what is the impedance of a network consisting of a 300-ohm-reactance capacitor, a 600-ohm-reactance inductor, and a 400-ohm resistor, all connected in series?
500 ohms at an angle of 37 degrees
900 ohms at an angle of 53 degrees
400 ohms at an angle of 0 degrees
1300 ohms at an angle of 180 degrees
E5D10: How can the true power be determined in an AC circuit where the voltage and current are out of phase?
By multiplying the apparent power times the power factor
By dividing the reactive power by the power factor
By dividing the apparent power by the power factor
By multiplying the reactive power times the power factor
E6A06: What is the beta of a bipolar junction transistor?
The frequency at which the current gain is reduced to 1
The change in collector current with respect to base current
The breakdown voltage of the base to collector junction
The switching speed of the transistor
E6B06: Which of the following is a common use of a hot-carrier diode?
As balanced mixers in FM generation
As a variable capacitance in an automatic frequency control circuit
As a constant voltage reference in a power supply
As a VHF / UHF mixer or detector
E6C12: What is BiCMOS logic?
A logic device with two CMOS circuits per package
An FET logic family based on bimetallic semiconductors
A logic family based on bismuth CMOS devices
An integrated circuit logic family using both bipolar and CMOS transistors
E6D10: What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?
Toroidal cores confine most of the magnetic field within the core material
Toroidal cores make it easier to couple the magnetic energy into other components
Toroidal cores exhibit greater hysteresis
Toroidal cores have lower Q characteristics
E6E02: Which of the following factors has the greatest effect in helping determine the bandwidth and response shape of a crystal ladder filter?
The relative frequencies of the individual crystals
The DC voltage applied to the quartz crystal
The gain of the RF stage preceding the filter
The amplitude of the signals passing through the filter
E6F07: What is a solid state relay?
A relay using transistors to drive the relay coil
A device that uses semiconductor devices to implement the functions of an electromechanical relay
A mechanical relay that latches in the on or off state each time it is pulsed
A passive delay line
E7A08: What logical operation does an OR gate perform?
It produces a logic "1" at its output if any or all inputs are logic "1"
It produces a logic "0" at its output if all inputs are logic "1"
It only produces a logic "0" at its output when all inputs are logic "1"
It produces a logic "1" at its output if all inputs are logic "0"
E7B12: What type of circuit is shown in Figure E7-1?
Switching voltage regulator
Linear voltage regulator
Common emitter amplifier
Emitter follower amplifier
E7C08: What kind of digital signal processing audio filter might be used to remove unwanted noise from a received SSB signal?
An adaptive filter
A crystal-lattice filter
A Hilbert-transform filter
A phase-inverting 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
E7E02: What is the function of a reactance modulator?
To produce PM signals by using an electrically variable resistance
To produce AM signals by using an electrically variable inductance or capacitance
To produce AM signals by using an electrically variable resistance
To produce PM signals by using an electrically variable inductance or capacitance
E7F08: Which of the following is performed by a frequency counter?
Determining the frequency deviation with an FM discriminator
Mixing the incoming signal with a WWV reference
Counting the number of input pulses occurring within a specific period of time
Converting the phase of the measured signal to a voltage which is proportional to the frequency
E7G09: What will be the output voltage of the circuit shown in Figure E7-4 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts dc is applied to the input?
0.23 volts
2.3 volts
-0.23 volts
-2.3 volts
E7H09: What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital to analog converter and a low-pass anti-alias filter?
A direct digital synthesizer
A hybrid synthesizer
A phase locked loop synthesizer
A diode-switching matrix synthesizer
E8A07: What determines the PEP-to-average power ratio of a single-sideband phone signal?
The frequency of the modulating signal
The characteristics of the modulating signal
The degree of carrier suppression
The amplifier gain
E8B02: How does the modulation index of a phase-modulated emission vary with RF carrier frequency (the modulated frequency)?
It increases as the RF carrier frequency increases
It decreases as the RF carrier frequency increases
It varies with the square root of the RF carrier frequency
It does not depend on the RF carrier frequency
E8C03: What is one advantage of using the ASCII code for data communications?
It includes built-in error-correction features
It contains fewer information bits per character than any other code
It is possible to transmit both upper and lower case text
It uses one character as a shift code to send numeric and special characters
E8D10: What type of meter should be used to monitor the output signal of a voice-modulated single-sideband transmitter to ensure you do not exceed the maximum allowable power?
An SWR meter reading in the forward direction
A modulation meter
An average reading wattmeter
A peak-reading wattmeter
E9A02: How much gain does a 1/2-wavelength dipole in free space have compared to an isotropic antenna?
1.55 dB
2.15 dB
3.05 dB
4.30 dB
E9B05: What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
The front-to-back ratio increases
The front-to-back ratio decreases
The frequency response is widened over the whole frequency band
The SWR is reduced
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
E9D04: Why is it desirable for a ground-mounted satellite communications antenna system to be able to move in both azimuth and elevation?
In order to track the satellite as it orbits the Earth
So the antenna can be pointed away from interfering signals
So the antenna can be positioned to cancel the effects of Faraday rotation
To rotate antenna polarization to match that of the satellite
E9E03: What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at the feed point?
The gamma match
The delta match
The omega match
The stub match
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
E9G05: What type of chart is shown in Figure E9-3?
Smith chart
Free-space radiation directivity chart
Elevation angle radiation pattern chart
Azimuth angle radiation pattern chart
E9H10: How can the output voltage of a multi-turn receiving loop antenna be increased?
By reducing the permeability of the loop shield
By increasing the number of wire turns in the loop and reducing the area of the loop structure
By winding adjacent turns in opposing directions
By increasing either the number of wire turns in the loop or the area of the loop structure or both
