Ham Extra License Practice Quiz
• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A07: How may dangerous levels of carbon monoxide from an emergency generator be detected?
By the odor
Only with a carbon monoxide detector
Any ordinary smoke detector can be used
By the yellowish appearance of the gas
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
E1B01: Which of the following constitutes a spurious emission?
An amateur station transmission made at random without the proper call sign identification
A signal transmitted to prevent its detection by any station other than the intended recipient
Any transmitted bogus signal that interferes with another licensed radio station
An emission outside its necessary bandwidth that can be reduced or eliminated without affecting the information transmitted
E1C04: When may an automatically controlled station retransmit third party communications?
Never
Only when transmitting RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
E1D05: What class of licensee is authorized to be the control operator of a space station?
All except Technician Class
Only General, Advanced or Amateur Extra Class
All classes
Only Amateur Extra Class
E1E01: What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?
5
2
4
3
E1F02: Which of the following operating arrangements allows an FCC-licensed US citizen to operate in many European countries, and alien amateurs from many European countries to operate in the US?
CEPT agreement
IARP agreement
ITU reciprocal license
All of these choices are correct
E2A04: What is meant by the term mode as applied to an amateur radio satellite?
The type of signals that can be relayed through the satellite
The satellite's uplink and downlink frequency bands
The satellite's orientation with respect to the Earth
Whether the satellite is in a polar or equatorial orbit
E2B10: Which of the following is an acceptable bandwidth for Digital Radio Mondiale (DRM) based voice or SSTV digital transmissions made on the HF amateur bands?
3 KHz
10 KHz
15 KHz
20 KHz
E2C11: How should you generally identify your station when attempting to contact a DX station working a pileup or in a contest?
Send your full call sign once or twice
Send only the last two letters of your call sign until you make contact
Send your full call sign and grid square
Send the call sign of the DX station three times, the words this is, then your call sign three times
E2D11: Which of the following data are used by the APRS network to communicate your location?
Polar coordinates
Time and frequency
Radio direction finding LOPs
Latitude and longitude
E2E10: Which of these digital communications modes has the narrowest bandwidth?
MFSK16
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
E3A04: What type of receiving system is desirable for EME communications?
Equipment with very wide bandwidth
Equipment with very low dynamic range
Equipment with very low gain
Equipment with very low noise figures
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
E3C14: Why does the radio-path horizon distance exceed the geometric horizon?
E-region skip
D-region skip
Downward bending due to aurora refraction
Downward bending due to density variations in the atmosphere
E4A02: Which of the following parameters would a spectrum analyzer display on the horizontal axis?
SWR
Q
Time
Frequency
E4B13: How is the compensation of an oscilloscope probe typically adjusted?
A square wave is displayed and the probe is adjusted until the horizontal portions of the displayed wave are as nearly flat as possible
A high frequency sine wave is displayed and the probe is adjusted for maximum amplitude
A frequency standard is displayed and the probe is adjusted until the deflection time is accurate
A DC voltage standard is displayed and the probe is adjusted until the displayed voltage is accurate
E4C09: Which of the following choices is a good reason for selecting a high frequency for the design of the IF in a conventional HF or VHF communications receiver?
Fewer components in the receiver
Reduced drift
Easier for front-end circuitry to eliminate image responses
Improved receiver noise figure
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
E5A05: What is the magnitude of the current at the input of a series RLC circuit as the frequency goes through resonance?
Minimum
Maximum
R/L
L/R
E5B12: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 50 ohms?
76 degrees with the voltage lagging the current
14 degrees with the voltage leading the current
14 degrees with the voltage lagging the current
76 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
E5D13: How much power is consumed in a circuit consisting of a 100 ohm resistor in series with a 100 ohm inductive reactance drawing 1 ampere?
70.7 Watts
100 Watts
141.4 Watts
200 Watts
E6A13: What do the initials CMOS stand for?
Common Mode Oscillating System
Complementary Mica-Oxide Silicon
Complementary Metal-Oxide Semiconductor
Common Mode Organic Silicon
E6B06: Which of the following is a common use of a hot-carrier diode?
As balanced mixers in FM generation
As a variable capacitance in an automatic frequency control circuit
As a constant voltage reference in a power supply
As a VHF / UHF mixer or detector
E6C10: In Figure E6-5, what is the schematic symbol for a NOR gate?
1
2
3
4
E6D15: What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?
They consume less power
They can display changes instantly
They are visible in all light conditions
They can be easily interchanged with other display devices
E6E03: What is one aspect of the piezoelectric effect?
Physical deformation of a crystal by the application of a voltage
Mechanical deformation of a crystal by the application of a magnetic field
The generation of electrical energy by the application of light
Reversed conduction states when a P-N junction is exposed to light
E6F08: Why are optoisolators often used in conjunction with solid state circuits when switching 120 VAC?
Optoisolators provide a low impedance link between a control circuit and a power circuit
Optoisolators provide impedance matching between the control circuit and power circuit
Optoisolators provide a very high degree of electrical isolation between a control circuit and the circuit being switched
Optoisolators eliminate the effects of reflected light in the control circuit
E7A05: Which of the following is a circuit that continuously alternates between two states without an external clock?
Monostable multivibrator
J-K flip-flop
T flip-flop
Astable multivibrator
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
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
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
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
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
E8A09: What type of waveform is produced by human speech?
Sinusoidal
Logarithmic
Irregular
Trapezoidal
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
E8C12: What is the advantage of including a parity bit with an ASCII character stream?
Faster transmission rate
The signal can overpower interfering signals
Foreign language characters can be sent
Some types of errors can be detected
E8D03: What input-amplitude parameter is valuable in evaluating the signal-handling capability of a Class A amplifier?
Peak voltage
RMS voltage
Average power
Resting voltage
E9A15: What is meant by the radiation resistance of an antenna?
The combined losses of the antenna elements and feed line
The specific impedance of the antenna
The value of a resistance that would dissipate the same amount of power as that radiated from an antenna
The resistance in the atmosphere that an antenna must overcome to be able to radiate a signal
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
E9C07: What type of antenna pattern over real ground is shown in Figure E9-2?
Elevation
Azimuth
Radiation resistance
Polarization
E9D10: What is the approximate feed point impedance at the center of a two-wire folded dipole antenna?
300 ohms
72 ohms
50 ohms
450 ohms
E9E13: What is the purpose of a Wilkinson divider?
It divides the operating frequency of a transmitter signal so it can be used on a lower frequency band
It is used to feed high-impedance antennas from a low-impedance source
It divides power equally among multiple loads while preventing changes in one load from disturbing power flow to the others
It is used to feed low-impedance loads from a high-impedance source
E9F01: What is the velocity factor of a transmission line?
The ratio of the characteristic impedance of the line to the terminating impedance
The index of shielding for coaxial cable
The velocity of the wave in the transmission line multiplied by the velocity of light in a vacuum
The velocity of the wave in the transmission line divided by the velocity of light in a vacuum
E9G11: How are the wavelength scales on a Smith chart calibrated?
In fractions of transmission line electrical frequency
In fractions of transmission line electrical wavelength
In fractions of antenna electrical wavelength
In fractions of antenna electrical frequency
E9H09: Which of the following describes the construction of a receiving loop antenna?
A large circularly-polarized antenna
A small coil of wire tightly wound around a toroidal ferrite core
One or more turns of wire wound in the shape of a large open coil
A vertical antenna coupled to a feed line through an inductive loop of wire
