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
E1A03: With your transceiver displaying the carrier frequency of phone signals, you hear a DX station's CQ on 14.349 MHz USB. Is it legal to return the call using upper sideband on the same frequency?
Yes, because the DX station initiated the contact
Yes, because the displayed frequency is within the 20 meter band
No, my sidebands will extend beyond the band edge
No, USA stations are not permitted to use phone emissions above 14.340 MHz
E1B09: Which amateur stations may be operated in RACES?
Only those club stations licensed to Amateur Extra class operators
Any FCC-licensed amateur station except a Technician class operator's station
Any FCC-licensed amateur station certified by the responsible civil defense organization for the area served
Any FCC-licensed amateur station participating in the Military Affiliate Radio System (MARS)
E1C02: What is meant by automatic control of a station?
The use of devices and procedures for control so that the control operator does not have to be present at a control point
A station operating with its output power controlled automatically
Remotely controlling a station's antenna pattern through a directional control link
The use of a control link between a control point and a locally controlled station
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
E1E06: Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?
The VEC coordinating the session
The FCC
Each administering VE
The VE session manager
E1F09: Which of the following conditions apply when transmitting spread spectrum emission?
A station transmitting SS emission must not cause harmful interference to other stations employing other authorized emissions
The transmitting station must be in an area regulated by the FCC or in a country that permits SS emissions
The transmission must not be used to obscure the meaning of any communication
All of these choices are correct
E2A04: What is meant by the term mode as applied to an amateur radio satellite?
The type of signals that can be relayed through the satellite
The satellite's uplink and downlink frequency bands
The satellite's orientation with respect to the Earth
Whether the satellite is in a polar or equatorial orbit
E2B02: How many horizontal lines make up a fast-scan (NTSC) television frame?
30
60
525
1080
E2C01: Which of the following is true about contest operating?
Operators are permitted to make contacts even if they do not submit a log
Interference to other amateurs is unavoidable and therefore acceptable
It is mandatory to transmit the call sign of the station being worked as part of every transmission to that station
Every contest requires a signal report in the exchange
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
E2E07: What is the typical bandwidth of a properly modulated MFSK16 signal?
31 Hz
316 Hz
550 Hz
2.16 kHz
E3A07: What frequency range would you normally tune to find EME signals in the 70 cm band?
430.000 - 430.150 MHz
430.100 - 431.100 MHz
431.100 - 431.200 MHz
432.000 - 432.100 MHz
E3B09: At what time of day is gray-line propagation most likely to occur?
At sunrise and sunset
When the Sun is directly above the location of the transmitting station
When the Sun is directly overhead at the middle of the communications path between the two stations
When the Sun is directly above the location of the receiving station
E3C11: From the contiguous 48 states, in which approximate direction should an antenna be pointed to take maximum advantage of aurora propagation?
South
North
East
West
E4A11: Which of these instruments could be used for detailed analysis of digital signals?
Dip meter
Oscilloscope
Ohmmeter
Q meter
E4B12: What is the significance of voltmeter sensitivity expressed in ohms per volt?
The full scale reading of the voltmeter multiplied by its ohms per volt rating will provide the input impedance of the voltmeter
When used as a galvanometer, the reading in volts multiplied by the ohms/volt will determine the power drawn by the device under test
When used as an ohmmeter, the reading in ohms divided by the ohms/volt will determine the voltage applied to the circuit
When used as an ammeter, the full scale reading in amps divided by ohms/volt will determine the size of shunt needed
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
E4D02: Which of the following describes two problems caused by poor dynamic range in a communications receiver?
Cross-modulation of the desired signal and desensitization from strong adjacent signals
Oscillator instability requiring frequent retuning and loss of ability to recover the opposite sideband
Cross-modulation of the desired signal and insufficient audio power to operate the speaker
Oscillator instability and severe audio distortion of all but the strongest received signals
E4E04: How can conducted and radiated noise caused by an automobile alternator be suppressed?
By installing filter capacitors in series with the DC power lead and by installing a blocking capacitor in the field lead
By installing a noise suppression resistor and a blocking capacitor in both leads
By installing a high-pass filter in series with the radio's power lead and a low-pass filter in parallel with the field lead
By connecting the radio's power leads directly to the battery and by installing coaxial capacitors in line with the alternator leads
E5A12: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?
436.6 kHz
218.3 kHz
31.4 kHz
15.7 kHz
E5B11: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?
14 degrees with the voltage lagging the current
14 degrees with the voltage leading the current
76 degrees with the voltage lagging the current
76 degrees with the voltage leading the current
E5C23: Which point on Figure E5-2 best represents the impedance of a series circuit consisting of a 300-ohm resistor, a 0.64-microhenry inductor and an 85-picofarad capacitor at 24.900 MHz?
Point 1
Point 3
Point 5
Point 8
E5D17: How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200V AC at 5 amperes?
200 watts
1000 watts
1600 watts
600 watts
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
E6B10: In Figure E6-3, what is the schematic symbol for a light-emitting diode?
1
5
6
7
E6C01: What is the recommended power supply voltage for TTL series integrated circuits?
12 volts
1.5 volts
5 volts
13.6 volts
E6D03: Which of the following is true of a charge-coupled device (CCD)?
Its phase shift changes rapidly with frequency
It is a CMOS analog-to-digital converter
It samples an analog signal and passes it in stages from the input to the output
It is used in a battery charger circuit
E6E08: How is power-supply voltage normally furnished to the most common type of monolithic microwave integrated circuit (MMIC)?
Through a resistor and/or RF choke connected to the amplifier output lead
MMICs require no operating bias
Through a capacitor and RF choke connected to the amplifier input lead
Directly to the bias-voltage (VCC IN) lead
E6F08: Why are optoisolators often used in conjunction with solid state circuits when switching 120 VAC?
Optoisolators provide a low impedance link between a control circuit and a power circuit
Optoisolators provide impedance matching between the control circuit and power circuit
Optoisolators provide a very high degree of electrical isolation between a control circuit and the circuit being switched
Optoisolators eliminate the effects of reflected light in the control circuit
E7A11: What is the name for logic which represents a logic "1" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B17: Why are third-order intermodulation distortion products of particular concern in linear power amplifiers?
Because they are relatively close in frequency to the desired signal
Because they are relatively far in frequency from the desired signal
Because they invert the sidebands causing distortion
Because they maintain the sidebands, thus causing multiple duplicate signals
E7C06: What are the distinguishing features of an elliptical filter?
Gradual passband rolloff with minimal stop band ripple
Extremely flat response over its pass band with gradually rounded stop band corners
Extremely sharp cutoff with one or more notches in the stop band
Gradual passband rolloff with extreme stop band ripple
E7D13: What is the purpose of D1 in the circuit shown in Figure E7-3?
To provide line voltage stabilization
To provide a voltage reference
Peak clipping
Hum filtering
E7E05: What circuit is added to an FM transmitter to boost the higher audio frequencies?
A de-emphasis network
A heterodyne suppressor
An audio prescaler
A pre-emphasis network
E7F10: What alternate method of determining frequency, other than by directly counting input pulses, is used by some counters?
GPS averaging
Period measurement plus mathematical computation
Prescaling
D/A conversion
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
E7H14: What is a phase-locked loop circuit?
An electronic servo loop consisting of a ratio detector, reactance modulator, and voltage-controlled oscillator
An electronic circuit also known as a monostable multivibrator
An electronic servo loop consisting of a phase detector, a low-pass filter, a voltage-controlled oscillator, and a stable reference oscillator
An electronic circuit consisting of a precision push-pull amplifier with a differential input
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
E8B08: What parameter does the modulating signal vary in a pulse-position modulation system?
The number of pulses per second
The amplitude of the pulses
The duration of the pulses
The time at which each pulse occurs
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
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
E9B05: What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
The front-to-back ratio increases
The front-to-back ratio decreases
The frequency response is widened over the whole frequency band
The SWR is reduced
E9C11: How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus rocky ground?
The low-angle radiation decreases
The high-angle radiation increases
Both the high- and low-angle radiation decrease
The low-angle radiation increases
E9D03: How does the beamwidth of an antenna vary as the gain is increased?
It increases geometrically
It increases arithmetically
It is essentially unaffected
It decreases
E9E07: What term best describes the interactions at the load end of a mismatched transmission line?
Characteristic impedance
Reflection coefficient
Velocity factor
Dielectric constant
E9F05: What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically one-quarter wavelength long at 14.1 MHz?
20 meters
2.3 meters
3.5 meters
0.2 meters
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
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
