Ham Extra License Practice Quiz


• Percentage: 0%; Correct: 0; Total: 0 of 50

E0A04: When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations?

Only the most powerful transmitter
Only commercial transmitters
Each transmitter that produces 5% or more of its MPE exposure limit at accessible locations
Each transmitter operating with a duty-cycle greater than 50%

E1A01: When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the highest frequency at which a properly adjusted USB emission will be totally within the band?

The exact upper band edge
300 Hz below the upper band edge
1 kHz below the upper band edge
3 kHz below the upper band edge

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

E1C10: What types of amateur stations may automatically retransmit the radio signals of other amateur stations?

Only beacon, repeater or space stations
Only auxiliary, repeater or space stations
Only earth stations, repeater stations or model craft
Only auxiliary, beacon or space stations

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

E1E12: What must the VE team do with the application form if the examinee does not pass the exam?

Return the application document to the examinee
Maintain the application form with the VEC's records
Send the application form to the FCC and inform the FCC of the grade
Destroy the application form

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

E2A08: Why should effective radiated power to a satellite which uses a linear transponder be limited?

To prevent creating errors in the satellite telemetry
To avoid reducing the downlink power to all other users
To prevent the satellite from emitting out of band signals
To avoid interfering with terrestrial QSOs

E2B03: How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?

By scanning two fields simultaneously
By scanning each field from bottom to top
By scanning lines from left to right in one field and right to left in the next
By scanning odd numbered lines in one field and even numbered ones in the next

E2C05: What is the function of a DX QSL Manager?

To allocate frequencies for DXpeditions
To handle the receiving and sending of confirmation cards for a DX station
To run a net to allow many stations to contact a rare DX station
To relay calls to and from a DX station

E2D04: What is the purpose of digital store-and-forward functions on an Amateur Radio satellite?

To upload operational software for the transponder
To delay download of telemetry between satellites
To store digital messages in the satellite for later download by other stations
To relay messages between satellites

E2E09: Which of the following HF digital modes uses variable-length coding for bandwidth efficiency?

RTTY
PACTOR
MT63
PSK31

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

E3B01: What is transequatorial propagation?

Propagation between two mid-latitude points at approximately the same distance north and south of the magnetic equator
Propagation between any two points located on the magnetic equator
Propagation between two continents by way of ducts along the magnetic equator
Propagation between two stations at the same latitude

E3C13: What type of polarization is best for ground-wave propagation?

Vertical
Horizontal
Circular
Elliptical

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

E4B11: How should a portable antenna analyzer be connected when measuring antenna resonance and feed point impedance?

Loosely couple the analyzer near the antenna base
Connect the analyzer via a high-impedance transformer to the antenna
Connect the antenna and a dummy load to the analyzer
Connect the antenna feed line directly to the analyzer's connector

E4C01: What is an effect of excessive phase noise in the local oscillator section of a receiver?

It limits the receiver's ability to receive strong signals
It reduces receiver sensitivity
It decreases receiver third-order intermodulation distortion dynamic range
It can cause strong signals on nearby frequencies to interfere with reception of weak signals

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

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

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

E5B13: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 250 ohms, R is 1 kilohm, and XL is 500 ohms?

81.47 degrees with the voltage lagging the current
81.47 degrees with the voltage leading the current
14.04 degrees with the voltage lagging the current
14.04 degrees with the voltage leading the current

E5C05: In polar coordinates, what is the impedance of a network consisting of a 400-ohm-reactance inductor in parallel with a 300-ohm resistor?

240 ohms at an angle of 36.9 degrees
240 ohms at an angle of -36.9 degrees
500 ohms at an angle of 53.1 degrees
500 ohms at an angle of -53.1 degrees

E5D16: What is the power factor of an RL circuit having a 30 degree phase angle between the voltage and the current?

1.73
0.5
0.866
0.577

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

E6B08: Which of the following describes a type of semiconductor diode?

Metal-semiconductor junction
Electrolytic rectifier
CMOS-field effect
Thermionic emission diode

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

E6D09: What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of transistorized HF amplifiers?

Electrolytic capacitors
Butterworth filters
Ferrite beads
Steel-core toroids

E6E04: What is the most common input and output impedance of circuits that use MMICs?

50 ohms
300 ohms
450 ohms
10 ohms

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

E7A09: D. It produces a logic "1" at its output if any single input is a logic "1"?

It produces a logic "0" at its output only if all inputs are logic "0"
It produces a logic "1" at its output only if all inputs are logic "1"

E7B20: What is a parametric amplifier?

A type of bipolar operational amplifier with excellent linearity derived from use of very high voltage on the collector
A low-noise VHF or UHF amplifier relying on varying reactance for amplification
A high power amplifier for HF application utilizing the Miller effect to increase gain
An audio push-pull amplifier using silicon carbide transistors for extremely low noise

E7C13: What is one advantage of a Pi matching network over an L matching network consisting of a single inductor and a single capacitor?

The Q of Pi networks can be varied depending on the component values chosen
L networks cannot perform impedance transformation
Pi networks have fewer components
Pi networks are designed for balanced input and output

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

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

E7F01: What is the purpose of a prescaler circuit?

It converts the output of a JK flip flop to that of an RS flip-flop
It multiplies a higher frequency signal so a low-frequency counter can display the operating frequency
It prevents oscillation in a low-frequency counter circuit
It divides a higher frequency signal so a low-frequency counter can display the input frequency

E7G08: How does the gain of an ideal operational amplifier vary with frequency?

It increases linearly with increasing frequency
It decreases linearly with increasing frequency
It decreases logarithmically with increasing frequency
It does not vary with frequency

E7H02: What condition must exist for a circuit to oscillate?

It must have at least two stages
It must be neutralized
It must have positive feedback with a gain greater than 1
It must have negative feedback sufficient to cancel the input signal

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

E8B10: Which of these methods can be used to combine several separate analog information streams into a single analog radio frequency signal?

Frequency shift keying
A diversity combiner
Frequency division multiplexing
Pulse compression

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

E8D07: What is an electromagnetic wave?

Alternating currents in the core of an electromagnet
A wave consisting of two electric fields at right angles to each other
A wave consisting of an electric field and a magnetic field oscillating at right angles to each other
A wave consisting of two magnetic fields at right angles to each other

E9A02: How much gain does a 1/2-wavelength dipole in free space have compared to an isotropic antenna?

1.55 dB
2.15 dB
3.05 dB
4.30 dB

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

E9C06: What is the effect of a terminating resistor on a rhombic antenna?

It reflects the standing waves on the antenna elements back to the transmitter
It changes the radiation pattern from bidirectional to unidirectional
It changes the radiation pattern from horizontal to vertical polarization
It decreases the ground loss

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

E9E10: Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?

Connect a 1/4-wavelength open stub of 300-ohm twin-lead in parallel with the coaxial feed line where it connects to the antenna
Insert a 1/2 wavelength piece of 300-ohm twin-lead in series between the antenna terminals and the 50-ohm feed cable
Insert a 1/4-wavelength piece of 75-ohm coaxial cable transmission line in series between the antenna terminals and the 50-ohm feed cable
Connect 1/2 wavelength shorted stub of 75-ohm cable in parallel with the 50-ohm cable where it attaches to the antenna

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

E9G03: Which of the following is often determined using a Smith chart?

Beam headings and radiation patterns
Satellite azimuth and elevation bearings
Impedance and SWR values in transmission lines
Trigonometric functions

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