Ham Extra License Practice Quiz
• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A06: Why are there separate electric (E) and magnetic (H) field MPE limits?
The body reacts to electromagnetic radiation from both the E and H fields
Ground reflections and scattering make the field impedance vary with location
E field and H field radiation intensity peaks can occur at different locations
All of these choices are correct
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
E1B08: What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receiver(s) involved are of good engineering design?
The amateur station must cease operation
The amateur station must cease operation on all frequencies below 30 MHz
The amateur station must cease operation on all frequencies above 30 MHz
The amateur station must avoid transmitting during certain hours on frequencies that cause the interference
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
E1D04: What is an Earth station in the amateur satellite service?
An amateur station within 50 km of the Earth's surface intended for communications with amateur stations by means of objects in space
An amateur station that is not able to communicate using amateur satellites
An amateur station that transmits telemetry consisting of measurement of upper atmosphere data from space
Any amateur station on the surface of the Earth
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
E1F06: What is the National Radio Quiet Zone?
An area in Puerto Rico surrounding the Aricebo Radio Telescope
An area in New Mexico surrounding the White Sands Test Area
An area surrounding the National Radio Astronomy Observatory
An area in Florida surrounding Cape Canaveral
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
E2B01: How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?
30
60
90
120
E2C07: What is the Cabrillo format?
A standard for submission of electronic contest logs
A method of exchanging information during a contest QSO
The most common set of contest rules
The rules of order for meetings between contest sponsors
E2D11: Which of the following data are used by the APRS network to communicate your location?
Polar coordinates
Time and frequency
Radio direction finding LOPs
Latitude and longitude
E2E12: Which type of digital communication does not support keyboard-to-keyboard operation?
Winlink
RTTY
PSK31
MFSK
E3A09: Which of the following frequency ranges is well suited for meteor-scatter communications?
1.8 - 1.9 MHz
10 - 14 MHz
28 - 148 MHz
220 - 450 MHz
E3B02: What is the approximate maximum range for signals using transequatorial propagation?
1000 miles
2500 miles
5000 miles
7500 miles
E3C05: Which of the following describes selective fading?
Variability of signal strength with beam heading
Partial cancellation of some frequencies within the received pass band
Sideband inversion within the ionosphere
Degradation of signal strength due to backscatter
E4A12: Which of the following procedures is an important precaution to follow when connecting a spectrum analyzer to a transmitter output?
Use high quality double shielded coaxial cables to reduce signal losses
Attenuate the transmitter output going to the spectrum analyzer
Match the antenna to the load
All of these choices are correct
E4B05: If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?
146.52 Hz
10 Hz
146.52 kHz
1465.20 Hz
E4C10: Which of the following is a desirable amount of selectivity for an amateur RTTY HF receiver?
100 Hz
300 Hz
6000 Hz
2400 Hz
E4D13: Which of the following can cause receiver desensitization?
Audio gain adjusted too low
Strong adjacent-channel signals
Audio bias adjusted too high
Squelch gain misadjusted
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
E5A10: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 1.8 MHz and a Q of 95?
18.9 kHz
1.89 kHz
94.5 kHz
9.45 kHz
E5B12: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 50 ohms?
76 degrees with the voltage lagging the current
14 degrees with the voltage leading the current
14 degrees with the voltage lagging the current
76 degrees with the voltage leading the current
E5C19: Which point on Figure E5-2 best represents that impedance of a series circuit consisting of a 400 ohm resistor and a 38 picofarad capacitor at 14 MHz?
Point 2
Point 4
Point 5
Point 6
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
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
E6B13: What type of bias is required for an LED to emit light?
Reverse bias
Forward bias
Zero bias
Inductive bias
E6C02: What logic state do the inputs of a TTL device assume if they are left open?
A logic-high state
A logic-low state
The device becomes randomized and will not provide consistent high or low-logic states
Open inputs on a TTL device are ignored
E6D16: What is one reason for using ferrite toroids rather than powdered-iron toroids in an inductor?
Ferrite toroids generally have lower initial permeabilities
Ferrite toroids generally have better temperature stability
Ferrite toroids generally require fewer turns to produce a given inductance value
Ferrite toroids are easier to use with surface mount technology
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
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
E7B06: Which of the following amplifier types reduces or eliminates even-order harmonics?
Push-push
Push-pull
Class C
Class AB
E7C11: Which of the following is the common name for a filter network which is equivalent to two L networks connected back-to-back with the inductors in series and the capacitors in shunt at the input and output?
Pi-L
Cascode
Omega
Pi
E7D08: What type of circuit is shown in Figure E7-3?
Switching voltage regulator
Grounded emitter amplifier
Linear voltage regulator
Emitter follower
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
E7F03: What is the function of a decade counter digital IC?
It produces one output pulse for every ten input pulses
It decodes a decimal number for display on a seven-segment LED display
It produces ten output pulses for every input pulse
It adds two decimal numbers together
E7G09: What will be the output voltage of the circuit shown in Figure E7-4 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts dc is applied to the input?
0.23 volts
2.3 volts
-0.23 volts
-2.3 volts
E7H01: What are three oscillator circuits used in Amateur Radio equipment?
Taft, Pierce and negative feedback
Pierce, Fenner and Beane
Taft, Hartley and Pierce
Colpitts, Hartley and Pierce
E8A05: What would be the most accurate way of measuring the RMS voltage of a complex waveform?
By using a grid dip meter
By measuring the voltage with a D'Arsonval meter
By using an absorption wavemeter
By measuring the heating effect in a known resistor
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
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
E9A08: What is meant by antenna gain?
The ratio relating the radiated signal strength of an antenna in the direction of maximum radiation to that of a reference antenna
The ratio of the signal in the forward direction to that in the opposite direction
The ratio of the amount of power radiated by an antenna compared to the transmitter output power
The final amplifier gain minus the transmission-line losses, including any phasing lines present
E9B08: How can the approximate beamwidth in a given plane of a directional antenna be determined?
Note the two points where the signal strength of the antenna is 3 dB less than maximum and compute the angular difference
Measure the ratio of the signal strengths of the radiated power lobes from the front and rear of the antenna
Draw two imaginary lines through the ends of the elements and measure the angle between the lines
Measure the ratio of the signal strengths of the radiated power lobes from the front and side of the antenna
E9C01: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?
A cardioid
Omnidirectional
A figure-8 broadside to the axis of the array
A figure-8 oriented along the axis of the array
E9D04: Why is it desirable for a ground-mounted satellite communications antenna system to be able to move in both azimuth and elevation?
In order to track the satellite as it orbits the Earth
So the antenna can be pointed away from interfering signals
So the antenna can be positioned to cancel the effects of Faraday rotation
To rotate antenna polarization to match that of the satellite
E9E01: What system matches a high-impedance transmission line to a lower impedance antenna by connecting the line to the driven element in two places spaced a fraction of a wavelength each side of element center?
The gamma matching system
The delta matching system
The omega matching system
The stub matching system
E9F02: Which of the following determines the velocity factor of a transmission line?
The termination impedance
The line length
Dielectric materials used in the line
The center conductor resistivity
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
E9H10: How can the output voltage of a multi-turn receiving loop antenna be increased?
By reducing the permeability of the loop shield
By increasing the number of wire turns in the loop and reducing the area of the loop structure
By winding adjacent turns in opposing directions
By increasing either the number of wire turns in the loop or the area of the loop structure or both
