Ham Extra License Practice Quiz

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E0A06: Why are there separate electric (E) and magnetic (H) field MPE limits?

The body reacts to electromagnetic radiation from both the E and H fields
Ground reflections and scattering make the field impedance vary with location
E field and H field radiation intensity peaks can occur at different locations
All of these choices are correct
E1A08: If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?

The control operator of the packet bulletin board station
The control operator of the originating station
The control operators of all the stations in the system
The control operators of all the stations in the system not authenticating the source from which they accept communications
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
E1C02: What is meant by automatic control of a station?

The use of devices and procedures for control so that the control operator does not have to be present at a control point
A station operating with its output power controlled automatically
Remotely controlling a station's antenna pattern through a directional control link
The use of a control link between a control point and a locally controlled station
E1D04: What is an Earth station in the amateur satellite service?

An amateur station within 50 km of the Earth's surface intended for communications with amateur stations by means of objects in space
An amateur station that is not able to communicate using amateur satellites
An amateur station that transmits telemetry consisting of measurement of upper atmosphere data from space
Any amateur station on the surface of the Earth
E1E01: What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?

5
2
4
3
E1F14: Under what circumstances might the FCC issue a "Special Temporary Authority" (STA) to an amateur station?

To provide for experimental amateur communications
To allow regular operation on Land Mobile channels
To provide additional spectrum for personal use
To provide temporary operation while awaiting normal licensing
E2A13: What type of satellite appears to stay in one position in the sky?

HEO
Geostationary
Geomagnetic
LEO
E2B09: What hardware, other than a receiver with SSB capability and a suitable computer, is needed to decode SSTV using Digital Radio Mondiale (DRM)?

A special IF converter
A special front end limiter
A special notch filter to remove synchronization pulses
No other hardware is needed
E2C02: Which of the following best describes the term "self-spotting" in regards to contest operating?

The generally prohibited practice of posting one's own call sign and frequency on a call sign spotting network
The acceptable practice of manually posting the call signs of stations on a call sign spotting network
A manual technique for rapidly zero beating or tuning to a station's frequency before calling that station
An automatic method for rapidly zero beating or tuning to a station's frequency before calling that station
E2D12: How does JT65 improve EME communications?

It can decode signals many dB below the noise floor using FEC
It controls the receiver to track Doppler shift
It supplies signals to guide the antenna to track the Moon
All of these choices are correct
E2E12: Which type of digital communication does not support keyboard-to-keyboard operation?

Winlink
RTTY
PSK31
MFSK
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
E3B05: Which amateur bands typically support long-path propagation?

160 to 40 meters
30 to 10 meters
160 to 10 meters
6 meters to 2 meters
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
E4A03: Which of the following parameters would a spectrum analyzer display on the vertical axis?

Amplitude
Duration
SWR
Q
E4B14: What happens if a dip meter is too tightly coupled to a tuned circuit being checked?

Harmonics are generated
A less accurate reading results
Cross modulation occurs
Intermodulation distortion occurs
E4C10: Which of the following is a desirable amount of selectivity for an amateur RTTY HF receiver?

100 Hz
300 Hz
6000 Hz
2400 Hz
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
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
E5A01: What can cause the voltage across reactances in series to be larger than the voltage applied to them?

Resonance
Capacitance
Conductance
Resistance
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
E5C07: In polar coordinates, what is the impedance of a network comprised of a 100-ohm-reactance capacitor in parallel with a 100-ohm resistor?

31 ohms at an angle of -15 degrees
51 ohms at an angle of -25 degrees
71 ohms at an angle of -45 degrees
91 ohms at an angle of -65 degrees
E5D09: What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?

It is dissipated as heat in the circuit
It is repeatedly exchanged between the associated magnetic and electric fields, but is not dissipated
It is dissipated as kinetic energy in the circuit
It is dissipated in the formation of inductive and capacitive fields
E6A15: Which of the following semiconductor materials contains an excess of holes in the outer shell of electrons?

N-type
P-type
Superconductor-type
Bipolar-type
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
E6C11: In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?

2
4
5
6
E6D03: Which of the following is true of a charge-coupled device (CCD)?

Its phase shift changes rapidly with frequency
It is a CMOS analog-to-digital converter
It samples an analog signal and passes it in stages from the input to the output
It is used in a battery charger circuit
E6E06: What characteristics of the MMIC make it a popular choice for VHF through microwave circuits?

The ability to retrieve information from a single signal even in the presence of other strong signals.
Plate current that is controlled by a control grid
Nearly infinite gain, very high input impedance, and very low output impedance
Controlled gain, low noise figure, and constant input and output impedance over the specified frequency range
E6F06: Which of these materials is affected the most by photoconductivity?

A crystalline semiconductor
An ordinary metal
A heavy metal
A liquid semiconductor
E7A12: What is the name for logic which represents a logic "0" as a high voltage?

Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B03: Which of the following forms the output of a class D amplifier circuit?

A low-pass filter to remove switching signal components
A high-pass filter to compensate for low gain at low frequencies
A matched load resistor to prevent damage by switching transients
A temperature-compensated load resistor to improve linearity
E7C12: Which of the following describes a Pi-L network used for matching a vacuum-tube final amplifier to a 50-ohm unbalanced output?

A Phase Inverter Load network
A Pi network with an additional series inductor on the output
A network with only three discrete parts
A matching network in which all components are isolated from ground
E7D07: What is the purpose of C2 in the circuit shown in Figure E7-3?

It bypasses hum around D1
It is a brute force filter for the output
To self-resonate at the hum frequency
To provide fixed DC bias for Q1
E7E14: What is meant by direct conversion when referring to a software defined receiver?

Software is converted from source code to object code during operation of the receiver
Incoming RF is converted to the IF frequency by rectification to generate the control voltage for a voltage controlled oscillator
Incoming RF is mixed to "baseband" for analog-to-digital conversion and subsequent processing
Software is generated in machine language, avoiding the need for compilers
E7F07: What determines the accuracy of a frequency counter?

The accuracy of the time base
The speed of the logic devices used
Accuracy of the AC input frequency to the power supply
Proper balancing of the mixer diodes
E7G03: Which of the following is an advantage of using an op-amp instead of LC elements in an audio filter?

Op-amps are more rugged
Op-amps are fixed at one frequency
Op-amps are available in more varieties than are LC elements
Op-amps exhibit gain rather than insertion loss
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
E8A08: What is the period of a wave?

The time required to complete one cycle
The number of degrees in one cycle
The number of zero crossings in one cycle
The amplitude of the wave
E8B02: How does the modulation index of a phase-modulated emission vary with RF carrier frequency (the modulated frequency)?

It increases as the RF carrier frequency increases
It decreases as the RF carrier frequency increases
It varies with the square root of the RF carrier frequency
It does not depend on the RF carrier frequency
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
E8D12: What is the peak voltage of a sinusoidal waveform if an RMS-reading voltmeter reads 34 volts?

123 volts
96 volts
55 volts
48 volts
E9A12: Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3-30 MHz range?

The standing-wave ratio
Distance from the transmitter
Soil conductivity
Take-off angle
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
E9C01: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

A cardioid
Omnidirectional
A figure-8 broadside to the axis of the array
A figure-8 oriented along the axis of the array
E9D13: What happens to feed point impedance at the base of a fixed-length HF mobile antenna as the frequency of operation is lowered?

The radiation resistance decreases and the capacitive reactance decreases
The radiation resistance decreases and the capacitive reactance increases
The radiation resistance increases and the capacitive reactance decreases
The radiation resistance increases and the capacitive reactance increases
E9E07: What term best describes the interactions at the load end of a mismatched transmission line?

Characteristic impedance
Reflection coefficient
Velocity factor
Dielectric constant
E9F04: What is the typical velocity factor for a coaxial cable with solid polyethylene dielectric?

2.70
0.66
0.30
0.10
E9G09: What third family of circles is often added to a Smith chart during the process of solving problems?

Standing-wave ratio circles
Antenna-length circles
Coaxial-length circles
Radiation-pattern circles
E9H11: What characteristic of a cardioid-pattern antenna is useful for direction finding?

A very sharp peak
A very sharp single null
Broad band response
High-radiation angle