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
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
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
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
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
E2A09: What do the terms L band and S band specify with regard to satellite communications?

The 23 centimeter and 13 centimeter bands
The 2 meter and 70 centimeter bands
FM and Digital Store-and-Forward systems
Which sideband to use
E2B02: How many horizontal lines make up a fast-scan (NTSC) television frame?

30
60
525
1080
E2C03: From which of the following bands is amateur radio contesting generally excluded?

30 meters
6 meters
2 meters
33 cm
E2D07: Which of the following digital protocols is used by APRS?

PACTOR
802.11
AX.25
AMTOR
E2E01: Which type of modulation is common for data emissions below 30 MHz?

DTMF tones modulating an FM signal
FSK
Pulse modulation
Spread spectrum
E3A08: When a meteor strikes the Earth's atmosphere, a cylindrical region of free electrons is formed at what layer of the ionosphere?

The E layer
The F1 layer
The F2 layer
The D layer
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
E3C13: What type of polarization is best for ground-wave propagation?

Vertical
Horizontal
Circular
Elliptical
E4A03: Which of the following parameters would a spectrum analyzer display on the vertical axis?

Amplitude
Duration
SWR
Q
E4B02: What is an advantage of using a bridge circuit to measure impedance?

It provides an excellent match under all conditions
It is relatively immune to drift in the signal generator source
The measurement is based on obtaining a signal null, which can be done very precisely
It can display results directly in Smith chart format
E4C12: What is an undesirable effect of using too wide a filter bandwidth in the IF section of a receiver?

Output-offset overshoot
Filter ringing
Thermal-noise distortion
Undesired signals may be heard
E4D01: What is meant by the blocking dynamic range of a receiver?

The difference in dB between the noise floor and thelevel of an incoming signal which will cause 1 dB of gain compression
The minimum difference in dB between the levels of two FM signals which will cause one signal to block the other
The difference in dB between the noise floor and the third order intercept point
The minimum difference in dB between two signals which produce third order intermodulation products greater than the noise floor
E4E12: What is one disadvantage of using some types of automatic DSP notch-filters when attempting to copy CW signals?

The DSP filter can remove the desired signal at the same time as it removes interfering signals
Any nearby signal passing through the DSP system will overwhelm the desired signal
Received CW signals will appear to be modulated at the DSP clock frequency
Ringing in the DSP filter will completely remove the spaces between the CW characters
E5A16: What is the resonant frequency of a parallel RLC circuit if R is 33 ohms, L is 50 microhenrys and C is 10 picofarads?

23.5 MHz
23.5 kHz
7.12 kHz
7.12 MHz
E5B06: How long does it take for an initial charge of 800 V DC to decrease to 294 V DC in a 450-microfarad capacitor when a 1-megohm resistor is connected across it?

4.50 seconds
9 seconds
450 seconds
900 seconds
E5C02: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance inductor, a 100-ohm-reactance capacitor, and a 100-ohm resistor, all connected in series?

100 ohms at an angle of 90 degrees
10 ohms at an angle of 0 degrees
10 ohms at an angle of 90 degrees
100 ohms at an angle of 0 degrees
E5D12: How many watts are consumed in a circuit having a power factor of 0.2 if the input is 100-V AC at 4 amperes?

400 watts
80 watts
2000 watts
50 watts
E6A10: In Figure E6-2, what is the schematic symbol for an N-channel dual-gate MOSFET?

2
4
5
6
E6B13: What type of bias is required for an LED to emit light?

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

Electromagnetic
Tubular
Radar
Electrostatic
E6E02: Which of the following factors has the greatest effect in helping determine the bandwidth and response shape of a crystal ladder filter?

The relative frequencies of the individual crystals
The DC voltage applied to the quartz crystal
The gain of the RF stage preceding the filter
The amplitude of the signals passing through the filter
E6F05: Which of the following describes an optical shaft encoder?

A device which detects rotation of a control by interrupting a light source with a patterned wheel
A device which measures the strength a beam of light using analog to digital conversion
A digital encryption device often used to encrypt spacecraft control signals
A device for generating RTTY signals by means of a rotating light source.
E7A14: What is a JK flip-flop?

A flip-flop similar to an RS except that it toggles when both J and K are high
A flip-flop utilizing low power, low temperature Joule-Kelvin devices
A flip-flop similar to a D flip-flop except that it triggers on the negative clock edge
A flip-flop originally developed in Japan and Korea which has very low power consumption
E7B15: What is one way to prevent thermal runaway in a bipolar transistor amplifier?

Neutralization
Select transistors with high beta
Use a resistor in series with the emitter
All of these choices are correct
E7C07: What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?

A band-pass filter
A notch filter
A Pi-network filter
An all-pass filter
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
E7E02: What is the function of a reactance modulator?

To produce PM signals by using an electrically variable resistance
To produce AM signals by using an electrically variable inductance or capacitance
To produce AM signals by using an electrically variable resistance
To produce PM signals by using an electrically variable inductance or capacitance
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
E7G15: What is the typical output impedance of an integrated circuit op-amp?

Very low
Very high
100 ohms
1000 ohms
E7H07: What is a magnetron oscillator?

An oscillator in which the output is fed back to the input by the magnetic field of a transformer
A crystal oscillator in which variable frequency is obtained by placing the crystal in a strong magnetic field
A UHF or microwave oscillator consisting of a diode vacuum tube with a specially shaped anode, surrounded by an external magnet
A reference standard oscillator in which the oscillations are synchronized by magnetic coupling to a rubidium gas tube
E8A12: What type of information can be conveyed using digital waveforms?

Human speech
Video signals
Data
All of these choices are correct
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
E8C09: Which of these techniques causes a digital signal to appear as wide-band noise to a conventional receiver?

Spread-spectrum
Independent sideband
Regenerative detection
Exponential addition
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
E9A11: Which of the following choices is a way to improve the efficiency of a ground-mounted quarter-wave vertical antenna?

Install a good radial system
Isolate the coax shield from ground
Shorten the radiating element
Reduce the diameter of the radiating element
E9B02: In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?

36 dB
18 dB
24 dB
14 dB
E9C11: How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus rocky ground?

The low-angle radiation decreases
The high-angle radiation increases
Both the high- and low-angle radiation decrease
The low-angle radiation increases
E9D01: How does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?

Gain does not change
Gain is multiplied by 0.707
Gain increases by 6 dB
Gain increases by 3 dB
E9E07: What term best describes the interactions at the load end of a mismatched transmission line?

Characteristic impedance
Reflection coefficient
Velocity factor
Dielectric constant
E9F15: What impedance does a 1/2-wavelength transmission line present to a generator when the line is open at the far end?

Very high impedance
Very low impedance
The same as the characteristic impedance of the line
The same as the output impedance of the generator
E9G07: On the Smith chart shown in Figure E9-3, what is the only straight line shown?

The reactance axis
The current axis
The voltage axis
The resistance axis
E9H08: What is the function of a sense antenna?

It modifies the pattern of a DF antenna array to provide a null in one direction
It increases the sensitivity of a DF antenna array
It allows DF antennas to receive signals at different vertical angles
It provides diversity reception that cancels multipath signals