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
E1A11: What authorization or licensing is required when operating an amateur station aboard a US-registered vessel in international waters?

Any amateur license with an FCC Marine or Aircraft endorsement
Any FCC-issued amateur license or a reciprocal permit for an alien amateur licensee
Only General class or higher amateur licenses
An unrestricted Radiotelephone Operator Permit
E1B06: Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?

You may have to notify the Federal Aviation Administration and register it with the FCC as required by Part 17 of FCC rules
No special rules apply if your antenna structure will be less than 300 feet in height
You must file an Environmental Impact Statement with the EPA before construction begins
You must obtain a construction permit from the airport zoning authority
E1C07: What is meant by local control?

Controlling a station through a local auxiliary link
Automatically manipulating local station controls
Direct manipulation of the transmitter by a control operator
Controlling a repeater using a portable handheld transceiver
E1D08: Which VHF amateur service bands have frequencies available for space stations?

6 meters and 2 meters
6 meters, 2 meters, and 1.25 meters
2 meters and 1.25 meters
2 meters
E1E05: What is the minimum passing score on amateur operator license examinations?

Minimum passing score of 70%
Minimum passing score of 74%
Minimum passing score of 80%
Minimum passing score of 77%
E1F10: What is the maximum transmitter power for an amateur station transmitting spread spectrum communications?

1 W
1.5 W
10 W
1.5 kW
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
E2B18: On which of the following frequencies is one likely to find FM ATV transmissions?

14.230 MHz
29.6 MHz
52.525 MHz
1255 MHz
E2C06: During a VHF/UHF contest, in which band segment would you expect to find the highest level of activity?

At the top of each band, usually in a segment reserved for contests
In the middle of each band, usually on the national calling frequency
In the weak signal segment of the band, with most of the activity near the calling frequency
In the middle of the band, usually 25 kHz above the national calling frequency
E2D03: Which of the following digital modes is especially useful for EME communications?

FSK441
PACTOR III
Olivia
JT65
E2E02: What do the letters FEC mean as they relate to digital operation?

Forward Error Correction
First Error Correction
Fatal Error Correction
Final Error Correction
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
E3B09: At what time of day is gray-line propagation most likely to occur?

At sunrise and sunset
When the Sun is directly above the location of the transmitting station
When the Sun is directly overhead at the middle of the communications path between the two stations
When the Sun is directly above the location of the receiving station
E3C03: Where in the ionosphere does Aurora activity occur?

In the F1-region
In the F2-region
In the D-region
In the E-region
E4A05: Which of the following test instruments is used to display intermodulation distortion products in an SSB transmission?

A wattmeter
A spectrum analyzer
A logic analyzer
A time-domain reflectometer
E4B06: How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

100 watts
125 watts
25 watts
75 watts
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
E4D08: What causes intermodulation in an electronic circuit?

Too little gain
Lack of neutralization
Nonlinear circuits or devices
Positive feedback
E4E05: How can noise from an electric motor be suppressed?

By installing a high pass filter in series with the motor's power leads
By installing a brute-force AC-line filter in series with the motor leads
By installing a bypass capacitor in series with the motor leads
By using a ground-fault current interrupter in the circuit used to power the motor
E5A14: What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?

44.72 MHz
22.36 MHz
3.56 MHz
1.78 MHz
E5B07: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 500 ohms, R is 1 kilohm, and XL is 250 ohms?

68.2 degrees with the voltage leading the current
14.0 degrees with the voltage leading the current
14.0 degrees with the voltage lagging the current
68.2 degrees with the voltage lagging the current
E5C05: In polar coordinates, what is the impedance of a network consisting of a 400-ohm-reactance inductor in parallel with a 300-ohm resistor?

240 ohms at an angle of 36.9 degrees
240 ohms at an angle of -36.9 degrees
500 ohms at an angle of 53.1 degrees
500 ohms at an angle of -53.1 degrees
E5D01: What is the result of skin effect?

As frequency increases, RF current flows in a thinner layer of the conductor, closer to the surface
As frequency decreases, RF current flows in a thinner layer of the conductor, closer to the surface
Thermal effects on the surface of the conductor increase the impedance
Thermal effects on the surface of the conductor decrease the impedance
E6A07: In Figure E6-1, what is the schematic symbol for a PNP transistor?

1
2
4
5
E6B10: In Figure E6-3, what is the schematic symbol for a light-emitting diode?

1
5
6
7
E6C09: In Figure E6-5, what is the schematic symbol for an OR gate?

2
3
4
6
E6D09: What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of transistorized HF amplifiers?

Electrolytic capacitors
Butterworth filters
Ferrite beads
Steel-core toroids
E6E12: What is a "Jones filter" as used as part of a HF receiver IF stage?

An automatic notch filter
A variable bandwidth crystal lattice filter
A special filter that emphasizes image responses
A filter that removes impulse noise
E6F10: What is the most common type of photovoltaic cell used for electrical power generation?

Selenium
Silicon
Cadmium Sulfide
Copper oxide
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
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
E7C01: How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?

Two inductors are in series between the input and output, and a capacitor is connected between the two inductors and ground
Two capacitors are in series between the input and output and an inductor is connected between the two capacitors and ground
An inductor is connected between the input and ground, another inductor is connected between the output and ground, and a capacitor is connected between the input and output
A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between input and output
E7D06: What is the purpose of Q1 in the circuit shown in Figure E7-3?

It provides negative feedback to improve regulation
It provides a constant load for the voltage source
It increases the current-handling capability of the regulator
It provides D1 with current
E7E08: What are the principal frequencies that appear at the output of a mixer circuit?

Two and four times the original frequency
The sum, difference and square root of the input frequencies
The two input frequencies along with their sum and difference frequencies
1.414 and 0.707 times the input frequency
E7F03: What is the function of a decade counter digital IC?

It produces one output pulse for every ten input pulses
It decodes a decimal number for display on a seven-segment LED display
It produces ten output pulses for every input pulse
It adds two decimal numbers together
E7G05: How can unwanted ringing and audio instability be prevented in a multi-section op-amp RC audio filter circuit?

Restrict both gain and Q
Restrict gain, but increase Q
Restrict Q, but increase gain
Increase both gain and Q
E7H13: What is the capture range of a phase-locked loop circuit?

The frequency range over which the circuit can lock
The voltage range over which the circuit can lock
The input impedance range over which the circuit can lock
The range of time it takes the circuit to lock
E8A09: What type of waveform is produced by human speech?

Sinusoidal
Logarithmic
Irregular
Trapezoidal
E8B07: When using a pulse-width modulation system, why is the transmitter's peak power greater than its average power?

The signal duty cycle is less than 100%
The signal reaches peak amplitude only when voice modulated
The signal reaches peak amplitude only when voltage spikes are generated within the modulator
The signal reaches peak amplitude only when the pulses are also amplitude modulated
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
E8D04: What is the PEP output of a transmitter that develops a peak voltage of 30 volts into a 50-ohm load?

4.5 watts
9 watts
16 watts
18 watts
E9A14: How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 12 dB gain over an isotropic antenna?

6.17 dB
9.85 dB
12.5 dB
14.15 dB
E9B08: How can the approximate beamwidth in a given plane of a directional antenna be determined?

Note the two points where the signal strength of the antenna is 3 dB less than maximum and compute the angular difference
Measure the ratio of the signal strengths of the radiated power lobes from the front and rear of the antenna
Draw two imaginary lines through the ends of the elements and measure the angle between the lines
Measure the ratio of the signal strengths of the radiated power lobes from the front and side of the antenna
E9C07: What type of antenna pattern over real ground is shown in Figure E9-2?

Elevation
Azimuth
Radiation resistance
Polarization
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
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
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
E9G06: On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

Prime axis
Reactance axis
Impedance axis
Polar axis
E9H05: What is the main drawback of a wire-loop antenna for direction finding?

It has a bidirectional pattern
It is non-rotatable
It receives equally well in all directions
It is practical for use only on VHF bands