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

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

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

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

E1D09: Which amateur service UHF bands have frequencies available for a space station?

70 cm
70 cm, 23 cm, 13 cm
70 cm and 33 cm
33 cm and 13 cm

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

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

E2A07: Which of the following types of signals can be relayed through a linear transponder?

FM and CW
SSB and SSTV
PSK and Packet
All of these choices are correct

E2B07: What is the name of the signal component that carries color information in NTSC video?

Luminance
Chroma
Hue
Spectral Intensity

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

E2D07: Which of the following digital protocols is used by APRS?

PACTOR
802.11
AX.25
AMTOR

E2E09: Which of the following HF digital modes uses variable-length coding for bandwidth efficiency?

RTTY
PACTOR
MT63
PSK31

E3A07: What frequency range would you normally tune to find EME signals in the 70 cm band?

430.000 - 430.150 MHz
430.100 - 431.100 MHz
431.100 - 431.200 MHz
432.000 - 432.100 MHz

E3B10: What is the cause of gray-line propagation?

At midday, the Sun being directly overhead superheats the ionosphere causing increased refraction of radio waves
At twilight, D-layer absorption drops while E-layer and F-layer propagation remain strong
In darkness, solar absorption drops greatly while atmospheric ionization remains steady
At mid afternoon, the Sun heats the ionosphere decreasing radio wave refraction and the MUF

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

E4A06: Which of the following could be determined with a spectrum analyzer?

The degree of isolation between the input and output ports of a 2 meter duplexer
Whether a crystal is operating on its fundamental or overtone frequency
The spectral output of a transmitter
All of these choices are correct

E4B04: If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

14.652 Hz
0.1 MHz
1.4652 Hz
1.4652 kHz

E4C07: What does the MDS of a receiver represent?

The meter display sensitivity
The minimum discernible signal
The multiplex distortion stability
The maximum detectable spectrum

E4D06: What is the term for unwanted signals generated by the mixing of two or more signals?

Amplifier desensitization
Neutralization
Adjacent channel interference
Intermodulation interference

E4E03: Which of the following signals might a receiver noise blanker be able to remove from desired signals?

Signals which are constant at all IF levels
Signals which appear across a wide bandwidth
Signals which appear at one IF but not another
Signals which have a sharply peaked frequency distribution

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

E5B13: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 250 ohms, R is 1 kilohm, and XL is 500 ohms?

81.47 degrees with the voltage lagging the current
81.47 degrees with the voltage leading the current
14.04 degrees with the voltage lagging the current
14.04 degrees with the voltage leading the current

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

E6A11: In Figure E6-2, what is the schematic symbol for a P-channel junction FET?

1
2
3
6

E6B07: What is the failure mechanism when a junction diode fails due to excessive current?

Excessive inverse voltage
Excessive junction temperature
Insufficient forward voltage
Charge carrier depletion

E6C01: What is the recommended power supply voltage for TTL series integrated circuits?

12 volts
1.5 volts
5 volts
13.6 volts

E6D13: What type of CRT deflection is better when high-frequency waveforms are to be displayed on the screen?

Electromagnetic
Tubular
Radar
Electrostatic

E6E08: How is power-supply voltage normally furnished to the most common type of monolithic microwave integrated circuit (MMIC)?

Through a resistor and/or RF choke connected to the amplifier output lead
MMICs require no operating bias
Through a capacitor and RF choke connected to the amplifier input lead
Directly to the bias-voltage (VCC IN) lead

E6F09: What is the efficiency of a photovoltaic cell?

The output RF power divided by the input dc power
The effective payback period
The open-circuit voltage divided by the short-circuit current under full illumination
The relative fraction of light that is converted to current

E7A06: What is a characteristic of a monostable multivibrator?

It switches momentarily to the opposite binary state and then returns, after a set time, to its original state
It is a clock that produces a continuous square wave oscillating between 1 and 0
It stores one bit of data in either a 0 or 1 state
It maintains a constant output voltage, regardless of variations in the input voltage

E7B10: In Figure E7-1, what is the purpose of R1 and R2?

Load resistors
Fixed bias
Self bias
Feedback

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

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

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

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

E7G08: How does the gain of an ideal operational amplifier vary with frequency?

It increases linearly with increasing frequency
It decreases linearly with increasing frequency
It decreases logarithmically with increasing frequency
It does not vary with frequency

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

E8A12: What type of information can be conveyed using digital waveforms?

Human speech
Video signals
Data
All of these choices are correct

E8B09: What is meant by deviation ratio?

The ratio of the audio modulating frequency to the center carrier frequency
The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency
The ratio of the carrier center frequency to the audio modulating frequency
The ratio of the highest audio modulating frequency to the average audio modulating frequency

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

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

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

E9B13: What does the abbreviation NEC stand for when applied to antenna modeling programs?

Next Element Comparison
Numerical Electromagnetics Code
National Electrical Code
Numeric Electrical Computation

E9C09: What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

15 dB
28 dB
3 dB
24 dB

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

E9E06: 3-element Yagi?

Pi network
Pi-L network
L network
Parallel-resonant tank

E9F12: What impedance does a 1/4-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
The same as the input impedance to the generator
Very high impedance
Very low impedance

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

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