Ham Extra License Practice Quiz
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E0A08: What does SAR measure?
Synthetic Aperture Ratio of the human body
Signal Amplification Rating
The rate at which RF energy is absorbed by the body
The rate of RF energy reflected from stationary terrain
E1A09: What is the first action you should take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules?
Discontinue forwarding the communication as soon as you become aware of it
Notify the originating station that the communication does not comply with FCC rules
Notify the nearest FCC Field Engineer's office
Discontinue forwarding all messages
E1B07: Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
At the lowest frequency of the channel
At the center frequency of the channel
At the highest frequency of the channel
On any frequency where the signal's sidebands are within the channel
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
E1D08: Which VHF amateur service bands have frequencies available for space stations?
6 meters and 2 meters
6 meters, 2 meters, and 1.25 meters
2 meters and 1.25 meters
2 meters
E1E07: What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?
Warn the candidate that continued failure to comply will result in termination of the examination
Immediately terminate the candidate's examination
Allow the candidate to complete the examination, but invalidate the results
Immediately terminate everyones examination and close the session
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
E2A05: What do the letters in a satellite's mode designator specify?
Power limits for uplink and downlink transmissions
The location of the ground control station
The polarization of uplink and downlink signals
The uplink and downlink frequency ranges
E2B18: On which of the following frequencies is one likely to find FM ATV transmissions?
14.230 MHz
29.6 MHz
52.525 MHz
1255 MHz
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
E2D06: Which of the following is a commonly used 2-meter APRS frequency?
144.39 MHz
144.20 MHz
145.02 MHz
146.52 MHz
E2E07: What is the typical bandwidth of a properly modulated MFSK16 signal?
31 Hz
316 Hz
550 Hz
2.16 kHz
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
E3B07: Which of the following could account for hearing an echo on the received signal of a distant station?
High D layer absorption
Meteor scatter
Transmit frequency is higher than the MUF
Receipt of a signal by more than one path
E3C10: How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?
The main lobe takeoff angle increases in the downhill direction
The main lobe takeoff angle decreases in the downhill direction
The horizontal beam width decreases in the downhill direction
The horizontal beam width increases in the uphill direction
E4A03: Which of the following parameters would a spectrum analyzer display on the vertical axis?
Amplitude
Duration
SWR
Q
E4B15: Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?
The inductance to capacitance ratio
The frequency shift
The bandwidth of the circuit's frequency response
The resonant frequency of the circuit
E4C14: On which of the following frequencies might a signal be transmitting which is generating a spurious image signal in a receiver tuned to 14.300 MHz and which uses a 455 kHz IF frequency?
13.845 MHz
14.755 MHz
14.445 MHz
15.210 MHz
E4D03: How can intermodulation interference between two repeaters occur?
When the repeaters are in close proximity and the signals cause feedback in the final amplifier of one or both transmitters
When the repeaters are in close proximity and the signals mix in the final amplifier of one or both transmitters
When the signals from the transmitters are reflected out of phase from airplanes passing overhead
When the signals from the transmitters are reflected in phase from airplanes passing overhead
E4E07: How can you determine if line noise interference is being generated within your home?
By checking the power line voltage with a time domain reflectometer
By observing the AC power line waveform with an oscilloscope
By turning off the AC power line main circuit breaker and listening on a battery operated radio
By observing the AC power line voltage with a spectrum analyzer
E5A07: What is the magnitude of the current at the input of a parallel RLC circuit at resonance?
Minimum
Maximum
R/L
L/R
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
E5C01: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance inductor in series with a 100-ohm resistor?
121 ohms at an angle of 35 degrees
141 ohms at an angle of 45 degrees
161 ohms at an angle of 55 degrees
181 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
E6A11: In Figure E6-2, what is the schematic symbol for a P-channel junction FET?
1
2
3
6
E6B09: What is a common use for point contact diodes?
As a constant current source
As a constant voltage source
As an RF detector
As a high voltage rectifier
E6C13: Which of the following is an advantage of BiCMOS logic?
Its simplicity results in much less expensive devices than standard CMOS
It is totally immune to electrostatic damage
It has the high input impedance of CMOS and the low output impedance of bipolar transistors
All of these choices are correct
E6D14: Which is NOT true of a charge-coupled device (CCD)?
It uses a combination of analog and digital circuitry
It can be used to make an audio delay line
It is commonly used as an analog-to-digital converter
It samples and stores analog signals
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
E6F07: What is a solid state relay?
A relay using transistors to drive the relay coil
A device that uses semiconductor devices to implement the functions of an electromechanical relay
A mechanical relay that latches in the on or off state each time it is pulsed
A passive delay line
E7A06: What is a characteristic of a monostable multivibrator?
It switches momentarily to the opposite binary state and then returns, after a set time, to its original state
It is a clock that produces a continuous square wave oscillating between 1 and 0
It stores one bit of data in either a 0 or 1 state
It maintains a constant output voltage, regardless of variations in the input voltage
E7B21: Which of the following devices is generally best suited for UHF or microwave power amplifier applications?
Field effect transistor
Nuvistor
Silicon controlled rectifier
Triac
E7C08: What kind of digital signal processing audio filter might be used to remove unwanted noise from a received SSB signal?
An adaptive filter
A crystal-lattice filter
A Hilbert-transform filter
A phase-inverting filter
E7D17: What is the primary reason that a high-frequency inverter type high-voltage power supply can be both less expensive and lighter in weight than a conventional power supply?
The inverter design does not require any output filtering
It uses a diode bridge rectifier for increased output
The high frequency inverter design uses much smaller transformers and filter components for an equivalent power output
It uses a large power-factor compensation capacitor to create "free power" from the unused portion of the AC cycle
E7E06: Why is de-emphasis commonly used in FM communications receivers?
For compatibility with transmitters using phase modulation
To reduce impulse noise reception
For higher efficiency
To remove third-order distortion products
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
E7G07: What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?
0.21
94
47
24
E7H08: What is a Gunn diode oscillator?
An oscillator based on the negative resistance properties of properly-doped semiconductors
An oscillator based on the argon gas diode
A highly stable reference oscillator based on the tee-notch principle
A highly stable reference oscillator based on the hot-carrier effect
E8A06: What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?
2.5 to 1
25 to 1
1 to 1
100 to 1
E8B04: What is the modulation index of an FM-phone signal having a maximum carrier deviation of plus or minus 6 kHz when modulated with a 2-kHz modulating frequency?
6000
3
2000
1/3
E8C05: What is the necessary bandwidth of a 13-WPM international Morse code transmission?
Approximately 13 Hz
Approximately 26 Hz
Approximately 52 Hz
Approximately 104 Hz
E8D08: Which of the following best describes electromagnetic waves traveling in free space?
Electric and magnetic fields become aligned as they travel
The energy propagates through a medium with a high refractive index
The waves are reflected by the ionosphere and return to their source
Changing electric and magnetic fields propagate the energy
E9A03: Which of the following antennas has no gain in any direction?
Quarter-wave vertical
Yagi
Half-wave dipole
Isotropic antenna
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
E9C05: What are the disadvantages of a terminated rhombic antenna for the HF bands?
The antenna has a very narrow operating bandwidth
The antenna produces a circularly polarized signal
The antenna requires a large physical area and 4 separate supports
The antenna is more sensitive to man-made static than any other type
E9D05: Where should a high-Q loading coil be placed to minimize losses in a shortened vertical antenna?
Near the center of the vertical radiator
As low as possible on the vertical radiator
As close to the transmitter as possible
At a voltage node
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
E9G08: What is the process of normalization with regard to a Smith chart?
Reassigning resistance values with regard to the reactance axis
Reassigning reactance values with regard to the resistance axis
Reassigning impedance values with regard to the prime center
Reassigning prime center with regard to the reactance axis
E9H12: What is an advantage of using a shielded loop antenna for direction finding?
It automatically cancels ignition noise pickup in mobile installations
It is electro-statically balanced against ground, giving better nulls
It eliminates tracking errors caused by strong out-of-band signals
It allows stations to communicate without giving away their position
