Ham Extra License Practice Quiz
• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A10: What material found in some electronic components such as high-voltage capacitors and transformers is considered toxic?
Polychlorinated biphenyls
Polyethylene
Polytetrafluroethylene
Polymorphic silicon
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
E1B02: Which of the following factors might cause the physical location of an amateur station apparatus or antenna structure to be restricted?
The location is near an area of political conflict
The location is of geographical or horticultural importance
The location is in an ITU zone designated for coordination with one or more foreign governments
The location is of environmental importance or significant in American history, architecture, or culture
E1C08: What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?
30 seconds
3 minutes
5 minutes
10 minutes
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
E1E05: What is the minimum passing score on amateur operator license examinations?
Minimum passing score of 70%
Minimum passing score of 74%
Minimum passing score of 80%
Minimum passing score of 77%
E1F01: On what frequencies are spread spectrum transmissions permitted?
Only on amateur frequencies above 50 MHz
Only on amateur frequencies above 222 MHz
Only on amateur frequencies above 420 MHz
Only on amateur frequencies above 144 MHz
E2A07: Which of the following types of signals can be relayed through a linear transponder?
FM and CW
SSB and SSTV
PSK and Packet
All of these choices are correct
E2B16: Which of the following is the video standard used by North American Fast Scan ATV stations?
PAL
DRM
Scottie
NTSC
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
E2D08: Which of the following types of packet frames is used to transmit APRS beacon data?
Unnumbered Information
Disconnect
Acknowledgement
Connect
E2E02: What do the letters FEC mean as they relate to digital operation?
Forward Error Correction
First Error Correction
Fatal Error Correction
Final Error Correction
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
E3B04: What type of propagation is probably occurring if an HF beam antenna must be pointed in a direction 180 degrees away from a station to receive the strongest signals?
Long-path
Sporadic-E
Transequatorial
Auroral
E3C08: What is the name of the high-angle wave in HF propagation that travels for some distance within the F2 region?
Oblique-angle ray
Pedersen ray
Ordinary ray
Heaviside ray
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
E4C05: What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?
The minimum detectable signal as a function of receive frequency
The theoretical noise at the input of a perfect receiver at room temperature
The noise figure of a 1 Hz bandwidth receiver
The galactic noise contribution to minimum detectable signal
E4D08: What causes intermodulation in an electronic circuit?
Too little gain
Lack of neutralization
Nonlinear circuits or devices
Positive feedback
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
E5A17: What is the resonant frequency of a parallel RLC circuit if R is 47 ohms, L is 25 microhenrys and C is 10 picofarads?
10.1 MHz
63.2 MHz
10.1 kHz
63.2 kHz
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
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
E5D01: What is the result of skin effect?
As frequency increases, RF current flows in a thinner layer of the conductor, closer to the surface
As frequency decreases, RF current flows in a thinner layer of the conductor, closer to the surface
Thermal effects on the surface of the conductor increase the impedance
Thermal effects on the surface of the conductor decrease the impedance
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
E6C08: In Figure E6-5, what is the schematic symbol for a NAND gate?
1
2
3
4
E6D01: What is cathode ray tube (CRT) persistence?
The time it takes for an image to appear after the electron beam is turned on
The relative brightness of the display under varying conditions of ambient light
The ability of the display to remain in focus under varying conditions
The length of time the image remains on the screen after the beam is turned off
E6E10: What is the equivalent circuit of a quartz crystal?
Motional capacitance, motional inductance and loss resistance in series, with a shunt capacitance representing electrode and stray capacitance
Motional capacitance, motional inductance, loss resistance, and a capacitor representing electrode and stray capacitance all in parallel
Motional capacitance, motional inductance, loss resistance, and a capacitor represent electrode and stray capacitance all in series
Motional inductance and loss resistance in series, paralleled with motional capacitance and a capacitor representing electrode and stray capacitance
E6F04: What is the photovoltaic effect?
The conversion of voltage to current when exposed to light
The conversion of light to electrical energy
The conversion of electrical energy to mechanical energy
The tendency of a battery to discharge when used outside
E7A11: What is the name for logic which represents a logic "1" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B11: In Figure E7-1, what is the purpose of R3?
Fixed bias
Emitter bypass
Output load resistor
Self bias
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
E7D16: When several electrolytic filter capacitors are connected in series to increase the operating voltage of a power supply filter circuit, why should resistors be connected across each capacitor?
To equalize, as much as possible, the voltage drop across each capacitor
To provide a safety bleeder to discharge the capacitors when the supply is off
To provide a minimum load current to reduce voltage excursions at light loads
All of these choices are correct
E7E08: What are the principal frequencies that appear at the output of a mixer circuit?
Two and four times the original frequency
The sum, difference and square root of the input frequencies
The two input frequencies along with their sum and difference frequencies
1.414 and 0.707 times the input frequency
E7F02: Which of the following would be used to reduce a signal's frequency by a factor of ten?
A preamp
A prescaler
A marker generator
A flip-flop
E7G10: What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 1800 ohms and RF is 68 kilohms?
1
0.03
38
76
E7H18: What are the major spectral impurity components of phase-locked loop synthesizers?
Phase noise
Digital conversion noise
Spurious signals at discrete frequencies
Nyquist limit noise
E8A01: What type of wave is made up of a sine wave plus all of its odd harmonics?
A square wave
A sine wave
A cosine wave
A tangent wave
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
E8C04: What technique is used to minimize the bandwidth requirements of a PSK31 signal?
Zero-sum character encoding
Reed-Solomon character encoding
Use of sinusoidal data pulses
Use of trapezoidal data pulses
E8D05: If an RMS-reading AC voltmeter reads 65 volts on a sinusoidal waveform, what is the peak-to-peak voltage?
46 volts
92 volts
130 volts
184 volts
E9A05: Which of the following factors may affect the feed point impedance of an antenna?
Transmission-line length
Antenna height, conductor length/diameter ratio and location of nearby conductive objects
Constant feed point impedance
Sunspot activity and time of day
E9B10: What is the principle of a Method of Moments analysis?
A wire is modeled as a series of segments, each having a uniform value of current
A wire is modeled as a single sine-wave current generator
A wire is modeled as a series of points, each having a distinct location in space
A wire is modeled as a series of segments, each having a distinct value of voltage across it
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
E9D02: How can linearly polarized Yagi antennas be used to produce circular polarization?
Stack two Yagis, fed 90 degrees out of phase, to form an array with the respective elements in parallel planes
Stack two Yagis, fed in phase, to form an array with the respective elements in parallel planes
Arrange two Yagis perpendicular to each other with the driven elements at the same point on the boom and fed 90 degrees out of phase
Arrange two Yagis collinear to each other, with the driven elements fed 180 degrees out of phase
E9E11: What is an effective way of matching a feed line to a VHF or UHF antenna when the impedances of both the antenna and feed line are unknown?
Use a 50-ohm 1:1 balun between the antenna and feed line
Use the "universal stub" matching technique
Connect a series-resonant LC network across the antenna feed terminals
Connect a parallel-resonant LC network across the antenna feed terminals
E9F04: What is the typical velocity factor for a coaxial cable with solid polyethylene dielectric?
2.70
0.66
0.30
0.10
E9G06: On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?
Prime axis
Reactance axis
Impedance axis
Polar axis
E9H06: What is the triangulation method of direction finding?
The geometric angle of sky waves from the source are used to determine its position
A fixed receiving station plots three headings from the signal source on a map
Antenna headings from several different receiving locations are used to locate the signal source
A fixed receiving station uses three different antennas to plot the location of the signal source
