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
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
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
E1C09: Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?
18.110 - 18.168 MHz
24.940 - 24.990 MHz
10.100 - 10.150 MHz
29.500 - 29.700 MHz
E1D07: Which amateur service HF bands have frequencies authorized to space stations?
Only 40m, 20m, 17m, 15m, 12m and 10m
Only 40m, 20m, 17m, 15m and 10m bands
40m, 30m, 20m, 15m, 12m and 10m bands
All HF bands
E1E04: Which of the following best describes the Volunteer Examiner accreditation process?
Each General, Advanced and Amateur Extra Class operator is automatically accredited as a VE when the license is granted
The amateur operator applying must pass a VE examination administered by the FCC Enforcement Bureau
The prospective VE obtains accreditation from the FCC
The procedure by which a VEC confirms that the VE applicant meets FCC requirements to serve as an examiner
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
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
E2B19: What special operating frequency restrictions are imposed on slow scan TV transmissions?
None; they are allowed on all amateur frequencies
They are restricted to 7.245 MHz, 14.245 MHz, 21.345, MHz, and 28.945 MHz
They are restricted to phone band segments and their bandwidth can be no greater than that of a voice signal of the same modulation type
They are not permitted above 54 MHz
E2C09: How does the spread-spectrum technique of frequency hopping work?
If interference is detected by the receiver it will signal the transmitter to change frequencies
If interference is detected by the receiver it will signal the transmitter to wait until the frequency is clear
A pseudo-random binary bit stream is used to shift the phase of an RF carrier very rapidly in a particular sequence
The frequency of the transmitted signal is changed very rapidly according to a particular sequence also used by the receiving station
E2D01: Which of the following digital modes is especially designed for use for meteor scatter signals?
WSPR
FSK441
Hellschreiber
APRS
E2E10: Which of these digital communications modes has the narrowest bandwidth?
MFSK16
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
E3A01: What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by Moon bounce?
500 miles, if the Moon is at perigee
2000 miles, if the Moon is at apogee
5000 miles, if the Moon is at perigee
12,000 miles, as long as both can "see" the Moon
E3B09: At what time of day is gray-line propagation most likely to occur?
At sunrise and sunset
When the Sun is directly above the location of the transmitting station
When the Sun is directly overhead at the middle of the communications path between the two stations
When the Sun is directly above the location of the receiving station
E3C03: Where in the ionosphere does Aurora activity occur?
In the F1-region
In the F2-region
In the D-region
In the E-region
E4A09: Which of the following describes a good method for measuring the intermodulation distortion of your own PSK signal?
Transmit into a dummy load, receive the signal on a second receiver, and feed the audio into the sound card of a computer running an appropriate PSK program
Multiply the ALC level on the transmitter during a normal transmission by the average power output
Use an RF voltmeter coupled to the transmitter output using appropriate isolation to prevent damage to the meter
All of these choices are correct
E4B08: Which of the following is a characteristic of a good DC voltmeter?
High reluctance input
Low reluctance input
High impedance input
Low impedance input
E4C15: What is the primary source of noise that can be heard from an HF receiver with an antenna connected?
Detector noise
Induction motor noise
Receiver front-end noise
Atmospheric noise
E4D12: What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?
Desensitization
Quieting
Cross-modulation interference
Squelch gain rollback
E4E02: Which of the following types of receiver noise can often be reduced with a DSP noise filter?
Broadband white noise
Ignition noise
Power line noise
All of these choices are correct
E5A11: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?
157.8 Hz
315.6 Hz
47.3 kHz
23.67 kHz
E5B03: The capacitor in an RC circuit is discharged to what percentage of the starting voltage after two time constants?
86.5%
63.2%
36.8%
13.5%
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
E5D11: What is the power factor of an R-L circuit having a 60 degree phase angle between the voltage and the current?
1.414
0.866
0.5
1.73
E6A09: What is a depletion-mode FET?
An FET that exhibits a current flow between source and drain when no gate voltage is applied
An FET that has no current flow between source and drain when no gate voltage is applied
Any FET without a channel
Any FET for which holes are the majority carriers
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
E6C04: Which of the following is the primary advantage of tri-state logic?
Low power consumption
Ability to connect many device outputs to a common bus
High speed operation
More efficient arithmetic operations
E6D02: Exceeding what design rating can cause a cathode ray tube (CRT) to generate X-rays?
The heater voltage
The anode voltage
The operating temperature
The operating frequency
E6E12: What is a "Jones filter" as used as part of a HF receiver IF stage?
An automatic notch filter
A variable bandwidth crystal lattice filter
A special filter that emphasizes image responses
A filter that removes impulse noise
E6F03: What is the most common configuration of an optoisolator or optocoupler?
A lens and a photomultiplier
A frequency modulated helium-neon laser
An amplitude modulated helium-neon laser
An LED and a phototransistor
E7A13: What is an SR or RS flip-flop?
A speed-reduced logic device with high power capability
A set/reset flip-flop whose output is low when R is high and S is low, high when S is high and R is low, and unchanged when both inputs are low
A speed-reduced logic device with very low voltage operation capability
A set/reset flip-flop that toggles whenever the T input is pulsed, unless both inputs are high
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
E7C05: Which filter type is described as having ripple in the passband and a sharp cutoff?
A Butterworth filter
An active LC filter
A passive op-amp filter
A Chebyshev filter
E7D10: What is the purpose of C3 in the circuit shown in Figure E7-3?
It prevents self-oscillation
It provides brute force filtering of the output
It provides fixed bias for Q1
It clips the peaks of the ripple
E7E13: Which of the following describes a common means of generating an SSB signal when using digital signal processing?
Mixing products are converted to voltages and subtracted by adder circuits
A frequency synthesizer removes the unwanted sidebands
Emulation of quartz crystal filter characteristics
The quadrature method
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
E7H05: How is positive feedback supplied in a Pierce oscillator?
Through a tapped coil
Through link coupling
Through a neutralizing capacitor
Through a quartz crystal
E8A11: What is one use for a pulse modulated signal?
Linear amplification
PSK31 data transmission
Multiphase power transmission
Digital data transmission
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
E8C07: What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?
15.36 kHz
9.6 kHz
4.8 kHz
5.76 kHz
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
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
E9B05: What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
The front-to-back ratio increases
The front-to-back ratio decreases
The frequency response is widened over the whole frequency band
The SWR is reduced
E9C02: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?
A cardioid
A figure-8 end-fire along the axis of the array
A figure-8 broadside to the axis of the array
Omnidirectional
E9D06: Why should an HF mobile antenna loading coil have a high ratio of reactance to resistance?
To swamp out harmonics
To maximize losses
To minimize losses
To minimize the Q
E9E12: What is the primary purpose of a phasing line when used with an antenna having multiple driven elements?
It ensures that each driven element operates in concert with the others to create the desired antenna pattern
It prevents reflected power from traveling back down the feed line and causing harmonic radiation from the transmitter
It allows single-band antennas to operate on other bands
It makes sure the antenna has a low-angle radiation pattern
E9F11: What impedance does a 1/8-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
An inductive reactance
A capacitive reactance
The same as the input impedance of the final generator stage
E9G01: Which of the following can be calculated using a Smith chart?
Impedance along transmission lines
Radiation resistance
Antenna radiation pattern
Radio propagation
E9H05: What is the main drawback of a wire-loop antenna for direction finding?
It has a bidirectional pattern
It is non-rotatable
It receives equally well in all directions
It is practical for use only on VHF bands
