Ham Extra License Practice Quiz
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E0A08: What does SAR measure?
Synthetic Aperture Ratio of the human body
Signal Amplification Rating
The rate at which RF energy is absorbed by the body
The rate of RF energy reflected from stationary terrain
E1A10: If an amateur station is installed aboard a ship or aircraft, what condition must be met before the station is operated?
Its operation must be approved by the master of the ship or the pilot in command of the aircraft
The amateur station operator must agree to not transmit when the main ship or aircraft radios are in use
It must have a power supply that is completely independent of the main ship or aircraft power supply
Its operator must have an FCC Marine or Aircraft endorsement on his or her amateur license
E1B04: What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historical Places?
A proposal must be submitted to the National Park Service
A letter of intent must be filed with the National Audubon Society
An Environmental Assessment must be submitted to the FCC
A form FSD-15 must be submitted to the Department of the Interior
E1C09: Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?
18.110 - 18.168 MHz
24.940 - 24.990 MHz
10.100 - 10.150 MHz
29.500 - 29.700 MHz
E1D05: What class of licensee is authorized to be the control operator of a space station?
All except Technician Class
Only General, Advanced or Amateur Extra Class
All classes
Only Amateur Extra Class
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
E1F03: Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?
It was purchased in used condition from an amateur operator and is sold to another amateur operator for use at that operator's station
The equipment dealer assembled it from a kit
It was imported from a manufacturer in a country that does not require certification of RF power amplifiers
It was imported from a manufacturer in another country, and it was certificated by that country's government
E2A12: What is one way to predict the location of a satellite at a given time?
By means of the Doppler data for the specified satellite
By subtracting the mean anomaly from the orbital inclination
By adding the mean anomaly to the orbital inclination
By calculations using the Keplerian elements for the specified satellite
E2B19: What special operating frequency restrictions are imposed on slow scan TV transmissions?
None; they are allowed on all amateur frequencies
They are restricted to 7.245 MHz, 14.245 MHz, 21.345, MHz, and 28.945 MHz
They are restricted to phone band segments and their bandwidth can be no greater than that of a voice signal of the same modulation type
They are not permitted above 54 MHz
E2C03: From which of the following bands is amateur radio contesting generally excluded?
30 meters
6 meters
2 meters
33 cm
E2D03: Which of the following digital modes is especially useful for EME communications?
FSK441
PACTOR III
Olivia
JT65
E2E07: What is the typical bandwidth of a properly modulated MFSK16 signal?
31 Hz
316 Hz
550 Hz
2.16 kHz
E3A09: Which of the following frequency ranges is well suited for meteor-scatter communications?
1.8 - 1.9 MHz
10 - 14 MHz
28 - 148 MHz
220 - 450 MHz
E3B04: What type of propagation is probably occurring if an HF beam antenna must be pointed in a direction 180 degrees away from a station to receive the strongest signals?
Long-path
Sporadic-E
Transequatorial
Auroral
E3C01: Which of the following effects does Aurora activity have on radio communications?
SSB signals are raspy
Signals propagating through the Aurora are fluttery
CW signals appear to be modulated by white noise
All of these choices are correct
E4A07: Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge to measure antenna SWR?
Antenna analyzers automatically tune your antenna for resonance
Antenna analyzers do not need an external RF source
Antenna analyzers display a time-varying representation of the modulation envelope
All of these choices are correct
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
E4C11: Which of the following is a desirable amount of selectivity for an amateur SSB phone receiver?
1 kHz
2.4 kHz
4.2 kHz
4.8 kHz
E4D12: What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?
Desensitization
Quieting
Cross-modulation interference
Squelch gain rollback
E4E04: How can conducted and radiated noise caused by an automobile alternator be suppressed?
By installing filter capacitors in series with the DC power lead and by installing a blocking capacitor in the field lead
By installing a noise suppression resistor and a blocking capacitor in both leads
By installing a high-pass filter in series with the radio's power lead and a low-pass filter in parallel with the field lead
By connecting the radio's power leads directly to the battery and by installing coaxial capacitors in line with the alternator leads
E5A12: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?
436.6 kHz
218.3 kHz
31.4 kHz
15.7 kHz
E5B05: How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?
0.02 seconds
0.04 seconds
20 seconds
40 seconds
E5C09: When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?
Resistive component
Reactive component
The sum of the reactive and resistive components
The difference between the resistive and reactive components
E5D17: How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200V AC at 5 amperes?
200 watts
1000 watts
1600 watts
600 watts
E6A13: What do the initials CMOS stand for?
Common Mode Oscillating System
Complementary Mica-Oxide Silicon
Complementary Metal-Oxide Semiconductor
Common Mode Organic Silicon
E6B12: What is one common use for PIN diodes?
As a constant current source
As a constant voltage source
As an RF switch
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
E6D12: How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?
35 turns
13 turns
79 turns
141 turns
E6E03: What is one aspect of the piezoelectric effect?
Physical deformation of a crystal by the application of a voltage
Mechanical deformation of a crystal by the application of a magnetic field
The generation of electrical energy by the application of light
Reversed conduction states when a P-N junction is exposed to light
E6F03: What is the most common configuration of an optoisolator or optocoupler?
A lens and a photomultiplier
A frequency modulated helium-neon laser
An amplitude modulated helium-neon laser
An LED and a phototransistor
E7A12: What is the name for logic which represents a logic "0" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B12: What type of circuit is shown in Figure E7-1?
Switching voltage regulator
Linear voltage regulator
Common emitter amplifier
Emitter follower amplifier
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
E7D14: What is one purpose of a "bleeder" resistor in a conventional (unregulated) power supply?
To cut down on waste heat generated by the power supply
To balance the low-voltage filament windings
To improve output voltage regulation
To boost the amount of output current
E7E13: Which of the following describes a common means of generating an SSB signal when using digital signal processing?
Mixing products are converted to voltages and subtracted by adder circuits
A frequency synthesizer removes the unwanted sidebands
Emulation of quartz crystal filter characteristics
The quadrature method
E7F10: What alternate method of determining frequency, other than by directly counting input pulses, is used by some counters?
GPS averaging
Period measurement plus mathematical computation
Prescaling
D/A conversion
E7G02: What is the effect of ringing in a filter?
An echo caused by a long time delay
A reduction in high frequency response
Partial cancellation of the signal over a range of frequencies
Undesired oscillations added to the desired signal
E7H03: How is positive feedback supplied in a Hartley oscillator?
Through a tapped coil
Through a capacitive divider
Through link coupling
Through a neutralizing capacitor
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
E8B08: What parameter does the modulating signal vary in a pulse-position modulation system?
The number of pulses per second
The amplitude of the pulses
The duration of the pulses
The time at which each pulse occurs
E8C10: What spread-spectrum communications technique alters the center frequency of a conventional carrier many times per second in accordance with a pseudo-random list of channels?
Frequency hopping
Direct sequence
Time-domain frequency modulation
Frequency compandored spread-spectrum
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
E9A04: Why would one need to know the feed point impedance of an antenna?
To match impedances in order to minimize standing wave ratio on the transmission line
To measure the near-field radiation density from a transmitting antenna
To calculate the front-to-side ratio of the antenna
To calculate the front-to-back ratio of the antenna
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
E9C05: What are the disadvantages of a terminated rhombic antenna for the HF bands?
The antenna has a very narrow operating bandwidth
The antenna produces a circularly polarized signal
The antenna requires a large physical area and 4 separate supports
The antenna is more sensitive to man-made static than any other type
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
E9E05: How must the driven element in a 3-element Yagi be tuned to use a hairpin matching system?
The driven element reactance must be capacitive
The driven element reactance must be inductive
The driven element resonance must be lower than the operating frequency
The driven element radiation resistance must be higher than the characteristic impedance of the transmission line
E9F07: How does ladder line compare to small-diameter coaxial cable such as RG-58 at 50 MHz?
Lower loss
Higher SWR
Smaller reflection coefficient
Lower velocity factor
E9G01: Which of the following can be calculated using a Smith chart?
Impedance along transmission lines
Radiation resistance
Antenna radiation pattern
Radio propagation
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
