Ham Extra License Practice Quiz
• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A10: What material found in some electronic components such as high-voltage capacitors and transformers is considered toxic?
Polychlorinated biphenyls
Polyethylene
Polytetrafluroethylene
Polymorphic silicon
E1A07: What is the only amateur band where transmission on specific channels rather than a range of frequencies is permitted?
12 meter band
17 meter band
30 meter band
60 meter band
E1B03: Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?
1 mile
3 miles
10 miles
30 miles
E1C04: When may an automatically controlled station retransmit third party communications?
Never
Only when transmitting RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
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
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
E2B05: Which of the following is an advantage of using vestigial sideband for standard fast- scan TV transmissions?
The vestigial sideband carries the audio information
The vestigial sideband contains chroma information
Vestigial sideband reduces bandwidth while allowing for simple video detector circuitry
Vestigial sideband provides high frequency emphasis to sharpen the picture
E2C10: Why might a DX station state that they are listening on another frequency?
Because the DX station may be transmitting on a frequency that is prohibited to some responding stations
To separate the calling stations from the DX station
To reduce interference, thereby improving operating efficiency
All of these choices are correct
E2D09: Under clear communications conditions, which of these digital communications modes has the fastest data throughput?
AMTOR
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
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
E3A06: What frequency range would you normally tune to find EME signals in the 2 meter band?
144.000 - 144.001 MHz
144.000 - 144.100 MHz
144.100 - 144.300 MHz
145.000 - 145.100 MHz
E3B05: Which amateur bands typically support long-path propagation?
160 to 40 meters
30 to 10 meters
160 to 10 meters
6 meters to 2 meters
E3C02: What is the cause of Aurora activity?
The interaction between the solar wind and the Van Allen belt
A low sunspot level combined with tropospheric ducting
The interaction of charged particles from the Sun with the Earth's magnetic field and the ionosphere
Meteor showers concentrated in the northern latitudes
E4A04: Which of the following test instruments is used to display spurious signals from a radio transmitter?
A spectrum analyzer
A wattmeter
A logic analyzer
A time-domain reflectometer
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
E4D14: Which of the following is a way to reduce the likelihood of receiver desensitization?
Decrease the RF bandwidth of the receiver
Raise the receiver IF frequency
Increase the receiver front end gain
Switch from fast AGC to slow AGC
E4E10: What is a common characteristic of interference caused by a touch controlled electrical device?
The interfering signal sounds like AC hum on an AM receiver or a carrier modulated by 60 Hz hum on a SSB or CW receiver
The interfering signal may drift slowly across the HF spectrum
The interfering signal can be several kHz in width and usually repeats at regular intervals across a HF band
All of these choices are correct
E5A09: What is the phase relationship between the current through and the voltage across a parallel 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
E5B12: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 50 ohms?
76 degrees with the voltage lagging the current
14 degrees with the voltage leading the current
14 degrees with the voltage lagging the current
76 degrees with the voltage leading the current
E5C19: Which point on Figure E5-2 best represents that impedance of a series circuit consisting of a 400 ohm resistor and a 38 picofarad capacitor at 14 MHz?
Point 2
Point 4
Point 5
Point 6
E5D11: What is the power factor of an R-L circuit having a 60 degree phase angle between the voltage and the current?
1.414
0.866
0.5
1.73
E6A07: In Figure E6-1, what is the schematic symbol for a PNP transistor?
1
2
4
5
E6B03: What special type of diode is capable of both amplification and oscillation?
Point contact
Zener
Tunnel
Junction
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
E6D16: What is one reason for using ferrite toroids rather than powdered-iron toroids in an inductor?
Ferrite toroids generally have lower initial permeabilities
Ferrite toroids generally have better temperature stability
Ferrite toroids generally require fewer turns to produce a given inductance value
Ferrite toroids are easier to use with surface mount technology
E6E11: Which of the following materials is likely to provide the highest frequency of operation when used in MMICs?
Silicon
Silicon nitride
Silicon dioxide
Gallium nitride
E6F05: Which of the following describes an optical shaft encoder?
A device which detects rotation of a control by interrupting a light source with a patterned wheel
A device which measures the strength a beam of light using analog to digital conversion
A digital encryption device often used to encrypt spacecraft control signals
A device for generating RTTY signals by means of a rotating light source.
E7A03: Which of the following can divide the frequency of a pulse train by 2?
An XOR gate
A flip-flop
An OR gate
A multiplexer
E7B07: Which of the following is a likely result when a Class C amplifier is used to amplify a single-sideband phone signal?
Reduced intermodulation products
Increased overall intelligibility
Signal inversion
Signal distortion and excessive bandwidth
E7C09: What type of digital signal processing filter might be used to generate an SSB signal?
An adaptive filter
A notch filter
A Hilbert-transform filter
An elliptical filter
E7D17: What is the primary reason that a high-frequency inverter type high-voltage power supply can be both less expensive and lighter in weight than a conventional power supply?
The inverter design does not require any output filtering
It uses a diode bridge rectifier for increased output
The high frequency inverter design uses much smaller transformers and filter components for an equivalent power output
It uses a large power-factor compensation capacitor to create "free power" from the unused portion of the AC cycle
E7E11: Which of the following types of detector is well suited for demodulating SSB signals?
Discriminator
Phase detector
Product detector
Phase comparator
E7F07: What determines the accuracy of a frequency counter?
The accuracy of the time base
The speed of the logic devices used
Accuracy of the AC input frequency to the power supply
Proper balancing of the mixer diodes
E7G12: What is an integrated circuit operational amplifier?
A high-gain, direct-coupled differential amplifier with very high input and very low output impedance
A digital audio amplifier whose characteristics are determined by components external to the amplifier
An amplifier used to increase the average output of frequency modulated amateur signals to the legal limit
An RF amplifier used in the UHF and microwave regions
E7H14: What is a phase-locked loop circuit?
An electronic servo loop consisting of a ratio detector, reactance modulator, and voltage-controlled oscillator
An electronic circuit also known as a monostable multivibrator
An electronic servo loop consisting of a phase detector, a low-pass filter, a voltage-controlled oscillator, and a stable reference oscillator
An electronic circuit consisting of a precision push-pull amplifier with a differential input
E8A15: What would the waveform of a stream of digital data bits look like on a conventional oscilloscope?
A series of sine waves with evenly spaced gaps
A series of pulses with varying patterns
A running display of alpha-numeric characters
None of the above; this type of signal cannot be seen on a conventional oscilloscope
E8B11: Which of the following describes frequency division multiplexing?
The transmitted signal jumps from band to band at a predetermined rate
Two or more information streams are merged into a "baseband", which then modulates the transmitter
The transmitted signal is divided into packets of information
Two or more information streams are merged into a digital combiner, which then pulse position modulates the transmitter
E8C13: What is one advantage of using JT-65 coding?
Uses only a 65 Hz bandwidth
The ability to decode signals which have a very low signal to noise ratio
Easily copied by ear if necessary
Permits fast-scan TV transmissions over narrow bandwidth
E8D16: What is the RMS value of a 340-volt peak-to-peak pure sine wave?
120V AC
170V AC
240V AC
300V AC
E9A11: Which of the following choices is a way to improve the efficiency of a ground-mounted quarter-wave vertical antenna?
Install a good radial system
Isolate the coax shield from ground
Shorten the radiating element
Reduce the diameter of the radiating element
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
E9C12: When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?
Its overall length must not exceed 1/4 wavelength
It must be mounted more than 1 wavelength above ground
It should be configured as a four-sided loop
It should be one or more wavelengths long
E9D03: How does the beamwidth of an antenna vary as the gain is increased?
It increases geometrically
It increases arithmetically
It is essentially unaffected
It decreases
E9E04: What is the purpose of the series capacitor in a gamma-type antenna matching network?
To provide DC isolation between the feed line and the antenna
To cancel the inductive reactance of the matching network
To provide a rejection notch to prevent the radiation of harmonics
To transform the antenna impedance to a higher value
E9F02: Which of the following determines the velocity factor of a transmission line?
The termination impedance
The line length
Dielectric materials used in the line
The center conductor resistivity
E9G01: Which of the following can be calculated using a Smith chart?
Impedance along transmission lines
Radiation resistance
Antenna radiation pattern
Radio propagation
E9H06: What is the triangulation method of direction finding?
The geometric angle of sky waves from the source are used to determine its position
A fixed receiving station plots three headings from the signal source on a map
Antenna headings from several different receiving locations are used to locate the signal source
A fixed receiving station uses three different antennas to plot the location of the signal source
