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%
E1A10: If an amateur station is installed aboard a ship or aircraft, what condition must be met before the station is operated?
Its operation must be approved by the master of the ship or the pilot in command of the aircraft
The amateur station operator must agree to not transmit when the main ship or aircraft radios are in use
It must have a power supply that is completely independent of the main ship or aircraft power supply
Its operator must have an FCC Marine or Aircraft endorsement on his or her amateur license
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
E1C01: What is a remotely controlled station?
A station operated away from its regular home location
A station controlled by someone other than the licensee
A station operating under automatic control
A station controlled indirectly through a control link
E1D01: What is the definition of the term telemetry?
One-way transmission of measurements at a distance from the measuring instrument
Two-way radiotelephone transmissions in excess of 1000 feet
Two-way single channel transmissions of data
One-way transmission that initiates, modifies, or terminates the functions of a device at a distance
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
E1F07: When may an amateur station send a message to a business?
When the total money involved does not exceed $25
When the control operator is employed by the FCC or another government agency
When transmitting international third-party communications
When neither the amateur nor his or her employer has a pecuniary interest in the communications
E2A09: What do the terms L band and S band specify with regard to satellite communications?
The 23 centimeter and 13 centimeter bands
The 2 meter and 70 centimeter bands
FM and Digital Store-and-Forward systems
Which sideband to use
E2B01: How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?
30
60
90
120
E2C10: Why might a DX station state that they are listening on another frequency?
Because the DX station may be transmitting on a frequency that is prohibited to some responding stations
To separate the calling stations from the DX station
To reduce interference, thereby improving operating efficiency
All of these choices are correct
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
E3A03: When scheduling EME contacts, which of these conditions will generally result in the least path loss?
When the Moon is at perigee
When the Moon is full
When the Moon is at apogee
When the MUF is above 30 MHz
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
E3C13: What type of polarization is best for ground-wave propagation?
Vertical
Horizontal
Circular
Elliptical
E4A11: Which of these instruments could be used for detailed analysis of digital signals?
Dip meter
Oscilloscope
Ohmmeter
Q meter
E4B01: Which of the following factors most affects the accuracy of a frequency counter?
Input attenuator accuracy
Time base accuracy
Decade divider accuracy
Temperature coefficient of the logic
E4C08: How might lowering the noise figure affect receiver performance?
It would reduce the signal to noise ratio
It would improve weak signal sensitivity
It would reduce bandwidth
It would increase bandwidth
E4D06: What is the term for unwanted signals generated by the mixing of two or more signals?
Amplifier desensitization
Neutralization
Adjacent channel interference
Intermodulation interference
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
E5A02: What is resonance in an electrical circuit?
The highest frequency that will pass current
The lowest frequency that will pass current
The frequency at which the capacitive reactance equals the inductive reactance
The frequency at which the reactive impedance equals the resistive impedance
E5B05: How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?
0.02 seconds
0.04 seconds
20 seconds
40 seconds
E5C07: In polar coordinates, what is the impedance of a network comprised of a 100-ohm-reactance capacitor in parallel with a 100-ohm resistor?
31 ohms at an angle of -15 degrees
51 ohms at an angle of -25 degrees
71 ohms at an angle of -45 degrees
91 ohms at an angle of -65 degrees
E5D06: In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?
In the same direction as the current
In a direction opposite to the current
In all directions; omnidirectional
In a direction determined by the left-hand rule
E6A08: What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?
Corner frequency
Alpha rejection frequency
Beta cutoff frequency
Alpha cutoff frequency
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
E6D05: What is a liquid-crystal display (LCD)?
A modern replacement for a quartz crystal oscillator which displays its fundamental frequency
A display using a crystalline liquid which, in conjunction with polarizing filters, becomes opaque when voltage is applied
A frequency-determining unit for a transmitter or receiver
A display that uses a glowing liquid to remain brightly lit in dim light
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
E6F05: Which of the following describes an optical shaft encoder?
A device which detects rotation of a control by interrupting a light source with a patterned wheel
A device which measures the strength a beam of light using analog to digital conversion
A digital encryption device often used to encrypt spacecraft control signals
A device for generating RTTY signals by means of a rotating light source.
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
E7B10: In Figure E7-1, what is the purpose of R1 and R2?
Load resistors
Fixed bias
Self bias
Feedback
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
E7E03: How does an analog phase modulator function?
By varying the tuning of a microphone preamplifier to produce PM signals
By varying the tuning of an amplifier tank circuit to produce AM signals
By varying the tuning of an amplifier tank circuit to produce PM signals
By varying the tuning of a microphone preamplifier to produce AM signals
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
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
E7H13: What is the capture range of a phase-locked loop circuit?
The frequency range over which the circuit can lock
The voltage range over which the circuit can lock
The input impedance range over which the circuit can lock
The range of time it takes the circuit to lock
E8A15: What would the waveform of a stream of digital data bits look like on a conventional oscilloscope?
A series of sine waves with evenly spaced gaps
A series of pulses with varying patterns
A running display of alpha-numeric characters
None of the above; this type of signal cannot be seen on a conventional oscilloscope
E8B05: What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?
60
0.167
0.6
1.67
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
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
E9A06: What is included in the total resistance of an antenna system?
Radiation resistance plus space impedance
Radiation resistance plus transmission resistance
Transmission-line resistance plus radiation resistance
Radiation resistance plus ohmic resistance
E9B06: If the boom of a Yagi antenna is lengthened and the elements are properly retuned, what usually occurs?
The gain increases
The SWR decreases
The front-to-back ratio increases
The gain bandwidth decreases rapidly
E9C12: When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?
Its overall length must not exceed 1/4 wavelength
It must be mounted more than 1 wavelength above ground
It should be configured as a four-sided loop
It should be one or more wavelengths long
E9D07: What is a disadvantage of using a multiband trapped antenna?
It might radiate harmonics
It radiates the harmonics and fundamental equally well
It is too sharply directional at lower frequencies
It must be neutralized
E9E03: What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at the feed point?
The gamma match
The delta match
The omega match
The stub match
E9F03: Why is the physical length of a coaxial cable transmission line shorter than its electrical length?
Skin effect is less pronounced in the coaxial cable
The characteristic impedance is higher in a parallel feed line
The surge impedance is higher in a parallel feed line
Electrical signals move more slowly in a coaxial cable than in air
E9G04: What are the two families of circles and arcs that make up a Smith chart?
Resistance and voltage
Reactance and voltage
Resistance and reactance
Voltage and impedance
E9H11: What characteristic of a cardioid-pattern antenna is useful for direction finding?
A very sharp peak
A very sharp single null
Broad band response
High-radiation angle
