Ham Extra License Practice Quiz

• Percentage: 0%; Correct: 0; Total: 0 of 50
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
E1A05: What is the maximum power output permitted on the 60 meter band?

50 watts PEP effective radiated power relative to an isotropic radiator
50 watts PEP effective radiated power relative to a dipole
100 watts PEP effective radiated power relative to the gain of a half-wave dipole
100 watts PEP effective radiated power relative to an isotropic radiator
E1B10: What frequencies are authorized to an amateur station participating in RACES?

All amateur service frequencies authorized to the control operator
Specific segments in the amateur service MF, HF, VHF and UHF bands
Specific local government channels
Military Affiliate Radio System (MARS) channels
E1C03: How do the control operator responsibilities of a station under automatic control differ from one under local control?

Under local control there is no control operator
Under automatic control the control operator is not required to be present at the control point
Under automatic control there is no control operator
Under local control a control operator is not required to be present at a control point
E1D06: Which of the following special provisions must a space station incorporate in order to comply with space station requirements?

The space station must be capable of terminating transmissions by telecommand when directed by the FCC
The space station must cease all transmissions after 5 years
The space station must be capable of changing its orbit whenever such a change is ordered by NASA
All of these choices are correct
E1E06: Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?

The VEC coordinating the session
The FCC
Each administering VE
The VE session manager
E1F12: Who may be the control operator of an auxiliary station?

Any licensed amateur operator
Only Technician, General, Advanced or Amateur Extra Class operators
Only General, Advanced or Amateur Extra Class operators
Only Amateur Extra Class operators
E2A04: What is meant by the term mode as applied to an amateur radio satellite?

The type of signals that can be relayed through the satellite
The satellite's uplink and downlink frequency bands
The satellite's orientation with respect to the Earth
Whether the satellite is in a polar or equatorial orbit
E2B12: How are analog SSTV images typically transmitted on the HF bands?

Video is converted to equivalent Baudot representation
Video is converted to equivalent ASCII representation
Varying tone frequencies representing the video are transmitted using PSK
Varying tone frequencies representing the video are transmitted using single sideband
E2C08: Why are received spread-spectrum signals resistant to interference?

Signals not using the spectrum-spreading algorithm are suppressed in the receiver
The high power used by a spread-spectrum transmitter keeps its signal from being easily overpowered
The receiver is always equipped with a digital blanker circuit
If interference is detected by the receiver it will signal the transmitter to change frequencies
E2D01: Which of the following digital modes is especially designed for use for meteor scatter signals?

WSPR
FSK441
Hellschreiber
APRS
E2E06: What is the most common data rate used for HF packet communications?

48 baud
110 baud
300 baud
1200 baud
E3A03: When scheduling EME contacts, which of these conditions will generally result in the least path loss?

When the Moon is at perigee
When the Moon is full
When the Moon is at apogee
When the MUF is above 30 MHz
E3B03: What is the best time of day for transequatorial propagation?

Morning
Noon
Afternoon or early evening
Late at night
E3C07: How does the radiation pattern of a horizontally polarized 3-element beam antenna vary with its height above ground?

The main lobe takeoff angle increases with increasing height
The main lobe takeoff angle decreases with increasing height
The horizontal beam width increases with height
The horizontal beam width decreases with height
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
E4B05: If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

146.52 Hz
10 Hz
146.52 kHz
1465.20 Hz
E4C05: What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?

The minimum detectable signal as a function of receive frequency
The theoretical noise at the input of a perfect receiver at room temperature
The noise figure of a 1 Hz bandwidth receiver
The galactic noise contribution to minimum detectable signal
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
E4E13: What might be the cause of a loud roaring or buzzing AC line interference that comes and goes at intervals?

Arcing contacts in a thermostatically controlled device
A defective doorbell or doorbell transformer inside a nearby residence
A malfunctioning illuminated advertising display
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
E5B02: What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial voltage?

One discharge period
An exponential discharge rate of one
A discharge factor of one
One time constant
E5C08: In polar coordinates, what is the impedance of a network comprised of a 300-ohm-reactance inductor in series with a 400-ohm resistor?

400 ohms at an angle of 27 degrees
500 ohms at an angle of 37 degrees
500 ohms at an angle of 47 degrees
700 ohms at an angle of 57 degrees
E5D15: What is the power factor of an RL circuit having a 45 degree phase angle between the voltage and the current?

0.866
1.0
0.5
0.707
E6A16: What are the majority charge carriers in N-type semiconductor material?

Holes
Free electrons
Free protons
Free neutrons
E6B04: What type of semiconductor device is designed for use as a voltage-controlled capacitor?

Varactor diode
Tunnel diode
Silicon-controlled rectifier
Zener diode
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
E6D11: How many turns will be required to produce a 1-mH inductor using a ferrite toroidal core that has an inductance index (A L) value of 523 millihenrys/1000 turns?

2 turns
4 turns
43 turns
229 turns
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
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
E7A10: What is a truth table?

A table of logic symbols that indicate the high logic states of an op-amp
A diagram showing logic states when the digital device's output is true
A list of inputs and corresponding outputs for a digital device
A table of logic symbols that indicates the low logic states of an op-amp
E7B14: In Figure E7-2, what is the purpose of C2?

Output coupling
Emitter bypass
Input coupling
Hum filtering
E7C10: Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?

A crystal filter
A cavity filter
A DSP filter
An L-C filter
E7D16: When several electrolytic filter capacitors are connected in series to increase the operating voltage of a power supply filter circuit, why should resistors be connected across each capacitor?

To equalize, as much as possible, the voltage drop across each capacitor
To provide a safety bleeder to discharge the capacitors when the supply is off
To provide a minimum load current to reduce voltage excursions at light loads
All of these choices are correct
E7E10: How does a diode detector function?

By rectification and filtering of RF signals
By breakdown of the Zener voltage
By mixing signals with noise in the transition region of the diode
By sensing the change of reactance in the diode with respect to frequency
E7F06: What is one purpose of a marker generator?

To add audio markers to an oscilloscope
To provide a frequency reference for a phase locked loop
To provide a means of calibrating a receiver's frequency settings
To add time signals to a transmitted signal
E7G07: What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

0.21
94
47
24
E7H11: What are the major spectral impurity components of direct digital synthesizers?

Broadband noise
Digital conversion noise
Spurious signals at discrete frequencies
Nyquist limit noise
E8A05: What would be the most accurate way of measuring the RMS voltage of a complex waveform?

By using a grid dip meter
By measuring the voltage with a D'Arsonval meter
By using an absorption wavemeter
By measuring the heating effect in a known resistor
E8B01: What is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal?

FM compressibility
Quieting index
Percentage of modulation
Modulation index
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
E8D06: What is the advantage of using a peak-reading wattmeter to monitor the output of a SSB phone transmitter?

It is easier to determine the correct tuning of the output circuit
It gives a more accurate display of the PEP output when modulation is present
It makes it easier to detect high SWR on the feed line
It can determine if any flat-topping is present during modulation peaks
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
E9B09: What type of computer program technique is commonly used for modeling antennas?

Graphical analysis
Method of Moments
Mutual impedance analysis
Calculus differentiation with respect to physical properties
E9C10: How many elevation lobes appear in the forward direction of the antenna radiation pattern shown in Figure E9-2?

4
3
1
7
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
E9E09: Which of these matching systems is an effective method of connecting a 50-ohm coaxial cable feed line to a grounded tower so it can be used as a vertical antenna?

Double-bazooka match
Hairpin match
Gamma match
All of these choices are correct
E9F11: What impedance does a 1/8-wavelength transmission line present to a generator when the line is open at the far end?

The same as the characteristic impedance of the line
An inductive reactance
A capacitive reactance
The same as the input impedance of the final generator stage
E9G04: What are the two families of circles and arcs that make up a Smith chart?

Resistance and voltage
Reactance and voltage
Resistance and reactance
Voltage and impedance
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