Ham Extra License Practice Quiz


• Percentage: 0%; Correct: 0; Total: 0 of 50

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

E1A09: What is the first action you should take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules?

Discontinue forwarding the communication as soon as you become aware of it
Notify the originating station that the communication does not comply with FCC rules
Notify the nearest FCC Field Engineer's office
Discontinue forwarding all messages

E1B11: What is the permitted mean power of any spurious emission relative to the mean power of the fundamental emission from a station transmitter or external RF amplifier installed after January 1, 2003, and transmitting on a frequency below 30 MHZ?

At least 43 dB below
At least 53 dB below
At least 63 dB below
At least 73 dB below

E1C06: Which of the following statements concerning remotely controlled amateur stations is true?

Only Extra Class operators may be the control operator of a remote station
A control operator need not be present at the control point
A control operator must be present at the control point
Repeater and auxiliary stations may not be remotely controlled

E1D02: What is the amateur satellite service?

A radio navigation service using satellites for the purpose of self training, intercommunication and technical studies carried out by amateurs
A spacecraft launching service for amateur-built satellites
A radio communications service using amateur radio stations on satellites
A radio communications service using stations on Earth satellites for public service broadcast

E1E03: What is a Volunteer Examiner Coordinator?

A person who has volunteered to administer amateur operator license examinations
A person who has volunteered to prepare amateur operator license examinations
An organization that has entered into an agreement with the FCC to coordinate amateur operator license examinations
The person who has entered into an agreement with the FCC to be the VE session manager

E1F04: Which of the following geographic descriptions approximately describes "Line A"?

A line roughly parallel to and south of the US-Canadian border
A line roughly parallel to and west of the US Atlantic coastline
A line roughly parallel to and north of the US-Mexican border and Gulf coastline
A line roughly parallel to and east of the US Pacific coastline

E2A10: Why may the received signal from an amateur satellite exhibit a rapidly repeating fading effect?

Because the satellite is spinning
Because of ionospheric absorption
Because of the satellite's low orbital altitude
Because of the Doppler Effect

E2B16: Which of the following is the video standard used by North American Fast Scan ATV stations?

PAL
DRM
Scottie
NTSC

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

E2D03: Which of the following digital modes is especially useful for EME communications?

FSK441
PACTOR III
Olivia
JT65

E2E12: Which type of digital communication does not support keyboard-to-keyboard operation?

Winlink
RTTY
PSK31
MFSK

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

E3B02: What is the approximate maximum range for signals using transequatorial propagation?

1000 miles
2500 miles
5000 miles
7500 miles

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

E4A04: Which of the following test instruments is used to display spurious signals from a radio transmitter?

A spectrum analyzer
A wattmeter
A logic analyzer
A time-domain reflectometer

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

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

E4D03: How can intermodulation interference between two repeaters occur?

When the repeaters are in close proximity and the signals cause feedback in the final amplifier of one or both transmitters
When the repeaters are in close proximity and the signals mix in the final amplifier of one or both transmitters
When the signals from the transmitters are reflected out of phase from airplanes passing overhead
When the signals from the transmitters are reflected in phase from airplanes passing overhead

E4E08: What type of signal is picked up by electrical wiring near a radio antenna?

A common-mode signal at the frequency of the radio transmitter
An electrical-sparking signal
A differential-mode signal at the AC power line frequency
Harmonics of the AC power line frequency

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

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

E5C10: When using rectangular coordinates to graph the impedance of a circuit, what does the vertical axis represent?

Resistive component
Reactive component
The sum of the reactive and resistive components
The difference between the resistive and reactive components

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

E6A17: What are the names of the three terminals of a field-effect transistor?

Gate 1, gate 2, drain
Emitter, base, collector
Emitter, base 1, base 2
Gate, drain, source

E6B03: What special type of diode is capable of both amplification and oscillation?

Point contact
Zener
Tunnel
Junction

E6C07: In Figure E6-5, what is the schematic symbol for an AND gate?

1
2
3
4

E6D04: What function does a charge-coupled device (CCD) serve in a modern video camera?

It stores photogenerated charges as signals corresponding to pixels
It generates the horizontal pulses needed for electron beam scanning
It focuses the light used to produce a pattern of electrical charges corresponding to the image
It combines audio and video information to produce a composite RF signal

E6E07: Which of the following techniques is typically used to construct a MMIC-based microwave amplifier?

Ground-plane construction
Microstrip construction
Point-to-point construction
Wave-soldering construction

E6F01: What is photoconductivity?

The conversion of photon energy to electromotive energy
The increased conductivity of an illuminated semiconductor
The conversion of electromotive energy to photon energy
The decreased conductivity of an illuminated semiconductor

E7A09: D. It produces a logic "1" at its output if any single input is a logic "1"?

It produces a logic "0" at its output only if all inputs are logic "0"
It produces a logic "1" at its output only if all inputs are logic "1"

E7B14: In Figure E7-2, what is the purpose of C2?

Output coupling
Emitter bypass
Input coupling
Hum filtering

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

E7D12: What is the purpose of R2 in the circuit shown in Figure E7-3?

It provides fixed bias for Q1
It provides fixed bias for D1
It decouples hum from D1
It provides a constant minimum load for Q1

E7E11: Which of the following types of detector is well suited for demodulating SSB signals?

Discriminator
Phase detector
Product detector
Phase comparator

E7F09: What is the purpose of a frequency counter?

To provide a digital representation of the frequency of a signal
To generate a series of reference signals at known frequency intervals
To display all frequency components of a transmitted signal
To provide a signal source at a very accurate frequency

E7G14: What is the typical input impedance of an integrated circuit op-amp?

100 ohms
1000 ohms
Very low
Very high

E7H12: Which of the following is a principal component of a direct digital synthesizer (DDS)?

Phase splitter
Hex inverter
Chroma demodulator
Phase accumulator

E8A13: What is an advantage of using digital signals instead of analog signals to convey the same information?

Less complex circuitry is required for digital signal generation and detection
Digital signals always occupy a narrower bandwidth
Digital signals can be regenerated multiple times without error
All of these choices are correct

E8B12: What is digital time division multiplexing?

Two or more data streams are assigned to discrete sub-carriers on an FM transmitter
Two or more signals are arranged to share discrete time slots of a data transmission
Two or more data streams share the same channel by transmitting time of transmission as the sub-carrier
Two or more signals are quadrature modulated to increase bandwidth efficiency

E8C06: What is the necessary bandwidth of a 170-hertz shift, 300-baud ASCII transmission?

0.1 Hz
0.3 kHz
0.5 kHz
1.0 kHz

E8D10: What type of meter should be used to monitor the output signal of a voice-modulated single-sideband transmitter to ensure you do not exceed the maximum allowable power?

An SWR meter reading in the forward direction
A modulation meter
An average reading wattmeter
A peak-reading wattmeter

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

E9B07: How does the total amount of radiation emitted by a directional gain antenna compare with the total amount of radiation emitted from an isotropic antenna, assuming each is driven by the same amount of power?

The total amount of radiation from the directional antenna is increased by the gain of the antenna
The total amount of radiation from the directional antenna is stronger by its front to back ratio
They are the same
The radiation from the isotropic antenna is 2.15 dB stronger than that from the directional antenna

E9C13: What is the main effect of placing a vertical antenna over an imperfect ground?

It causes increased SWR
It changes the impedance angle of the matching network
It reduces low-angle radiation
It reduces losses in the radiating portion of the antenna

E9D11: What is the function of a loading coil as used with an HF mobile antenna?

To increase the SWR bandwidth
To lower the losses
To lower the Q
To cancel capacitive reactance

E9E02: What is the name of an antenna matching system that matches an unbalanced feed line to an antenna by feeding the driven element both at the center of the element and at a fraction of a wavelength to one side of center?

The gamma match
The delta match
The epsilon match
The stub match

E9F02: Which of the following determines the velocity factor of a transmission line?

The termination impedance
The line length
Dielectric materials used in the line
The center conductor resistivity

E9G10: What do the arcs on a Smith chart represent?

Frequency
SWR
Points with constant resistance
Points with constant reactance

E9H10: How can the output voltage of a multi-turn receiving loop antenna be increased?

By reducing the permeability of the loop shield
By increasing the number of wire turns in the loop and reducing the area of the loop structure
By winding adjacent turns in opposing directions
By increasing either the number of wire turns in the loop or the area of the loop structure or both