Ham Extra License Practice Quiz
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E0A01: What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna?
There is no significant difference between the two types of radiation
Only radiation produced by radioactivity can injure human beings
Radioactive materials emit ionizing radiation, while RF signals have less energy and can only cause heating
Radiation from an antenna will damage unexposed photographic film but ordinary radioactive materials do not cause this problem
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
E1B05: What is the maximum bandwidth for a data emission on 60 meters?
60 Hz
170 Hz
1.5 kHz
2.8 kHz
E1C08: What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?
30 seconds
3 minutes
5 minutes
10 minutes
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
E1E11: What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?
Photocopy all examination documents and forward them to the FCC for processing
Three VEs must certify that the examinee is qualified for the license grant and that they have complied with the administering VE requirements
Issue the examinee the new or upgrade license
All these choices are correct
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
E2A01: What is the direction of an ascending pass for an amateur satellite?
From west to east
From east to west
From south to north
From north to south
E2B13: How many lines are commonly used in each frame on an amateur slow-scan color television picture?
30 to 60
60 or 100
128 or 256
180 or 360
E2C07: What is the Cabrillo format?
A standard for submission of electronic contest logs
A method of exchanging information during a contest QSO
The most common set of contest rules
The rules of order for meetings between contest sponsors
E2D04: What is the purpose of digital store-and-forward functions on an Amateur Radio satellite?
To upload operational software for the transponder
To delay download of telemetry between satellites
To store digital messages in the satellite for later download by other stations
To relay messages between satellites
E2E06: What is the most common data rate used for HF packet communications?
48 baud
110 baud
300 baud
1200 baud
E3A02: What characterizes libration fading of an Earth-Moon-Earth signal?
A slow change in the pitch of the CW signal
A fluttery irregular fading
A gradual loss of signal as the Sun rises
The returning echo is several Hertz lower in frequency than the transmitted signal
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
E3C11: From the contiguous 48 states, in which approximate direction should an antenna be pointed to take maximum advantage of aurora propagation?
South
North
East
West
E4A02: Which of the following parameters would a spectrum analyzer display on the horizontal axis?
SWR
Q
Time
Frequency
E4B07: Which of the following is good practice when using an oscilloscope probe?
Keep the signal ground connection of the probe as short as possible
Never use a high impedance probe to measure a low impedance circuit
Never use a DC-coupled probe to measure an AC circuit
All of these choices are correct
E4C03: What is the term for the blocking of one FM phone signal by another, stronger FM phone signal?
Desensitization
Cross-modulation interference
Capture effect
Frequency discrimination
E4D04: Which of the following may reduce or eliminate intermodulation interference in a repeater caused by another transmitter operating in close proximity?
A band-pass filter in the feed line between the transmitter and receiver
A properly terminated circulator at the output of the transmitter
A Class C final amplifier
A Class D final amplifier
E4E14: What is one type of electrical interference that might be caused by the operation of a nearby personal computer?
A loud AC hum in the audio output of your station receiver
A clicking noise at intervals of a few seconds
The appearance of unstable modulated or unmodulated signals at specific frequencies
A whining type noise that continually pulses off and on
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
E5B09: What is the relationship between the current through a capacitor and the voltage across a capacitor?
Voltage and current are in phase
Voltage and current are 180 degrees out of phase
Voltage leads current by 90 degrees
Current leads voltage by 90 degrees
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
E5D08: What type of energy is stored in an electromagnetic or electrostatic field?
Electromechanical energy
Potential energy
Thermodynamic energy
Kinetic energy
E6A12: Why do many MOSFET devices have internally connected Zener diodes on the gates?
To provide a voltage reference for the correct amount of reverse-bias gate voltage
To protect the substrate from excessive voltages
To keep the gate voltage within specifications and prevent the device from overheating
To reduce the chance of the gate insulation being punctured by static discharges or excessive voltages
E6B09: What is a common use for point contact diodes?
As a constant current source
As a constant voltage source
As an RF detector
As a high voltage rectifier
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
E6D13: What type of CRT deflection is better when high-frequency waveforms are to be displayed on the screen?
Electromagnetic
Tubular
Radar
Electrostatic
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
E6F02: What happens to the conductivity of a photoconductive material when light shines on it?
It increases
It decreases
It stays the same
It becomes unstable
E7A15: What is a D flip-flop?
A flip-flop whose output takes on the state of the D input when the clock signal transitions from low to high
A differential class D amplifier used as a flip-flop circuit
A dynamic memory storage element
A flip-flop whose output is capable of both positive and negative voltage excursions
E7B08: How can an RF power amplifier be neutralized?
By increasing the driving power
By reducing the driving power
By feeding a 180-degree out-of-phase portion of the output back to the input
By feeding an in-phase component of the output back to the input
E7C14: Which of these modes is most affected by non-linear phase response in a receiver IF filter?
Meteor Scatter
Single-Sideband voice
Digital
Video
E7D04: Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?
A series current source
A series regulator
A shunt regulator
A shunt current source
E7E05: What circuit is added to an FM transmitter to boost the higher audio frequencies?
A de-emphasis network
A heterodyne suppressor
An audio prescaler
A pre-emphasis network
E7F04: What additional circuitry must be added to a 100-kHz crystal-controlled marker generator so as to provide markers at 50 and 25 kHz?
An emitter-follower
Two frequency multipliers
Two flip-flops
A voltage divider
E7G03: Which of the following is an advantage of using an op-amp instead of LC elements in an audio filter?
Op-amps are more rugged
Op-amps are fixed at one frequency
Op-amps are available in more varieties than are LC elements
Op-amps exhibit gain rather than insertion loss
E7H02: What condition must exist for a circuit to oscillate?
It must have at least two stages
It must be neutralized
It must have positive feedback with a gain greater than 1
It must have negative feedback sufficient to cancel the input signal
E8A03: What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics?
A sawtooth wave
A square wave
A sine wave
A cosine wave
E8B03: What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, when the modulating frequency is 1000 Hz?
3
0.3
3000
1000
E8C12: What is the advantage of including a parity bit with an ASCII character stream?
Faster transmission rate
The signal can overpower interfering signals
Foreign language characters can be sent
Some types of errors can be detected
E8D11: What is the average power dissipated by a 50-ohm resistive load during one complete RF cycle having a peak voltage of 35 volts?
12.2 watts
9.9 watts
24.5 watts
16 watts
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
E9B01: In the antenna radiation pattern shown in Figure E9-1, what is the 3-dB beamwidth?
75 degrees
50 degrees
25 degrees
30 degrees
E9C01: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?
A cardioid
Omnidirectional
A figure-8 broadside to the axis of the array
A figure-8 oriented along the axis of the array
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
E9E10: Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?
Connect a 1/4-wavelength open stub of 300-ohm twin-lead in parallel with the coaxial feed line where it connects to the antenna
Insert a 1/2 wavelength piece of 300-ohm twin-lead in series between the antenna terminals and the 50-ohm feed cable
Insert a 1/4-wavelength piece of 75-ohm coaxial cable transmission line in series between the antenna terminals and the 50-ohm feed cable
Connect 1/2 wavelength shorted stub of 75-ohm cable in parallel with the 50-ohm cable where it attaches to the antenna
E9F10: What impedance does a 1/8-wavelength transmission line present to a generator when the line is shorted at the far end?
A capacitive reactance
The same as the characteristic impedance of the line
An inductive reactance
The same as the input impedance to the final generator stage
E9G03: Which of the following is often determined using a Smith chart?
Beam headings and radiation patterns
Satellite azimuth and elevation bearings
Impedance and SWR values in transmission lines
Trigonometric functions
E9H08: What is the function of a sense antenna?
It modifies the pattern of a DF antenna array to provide a null in one direction
It increases the sensitivity of a DF antenna array
It allows DF antennas to receive signals at different vertical angles
It provides diversity reception that cancels multipath signals
