Ham Extra License Practice Quiz
• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A01: What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna?
There is no significant difference between the two types of radiation
Only radiation produced by radioactivity can injure human beings
Radioactive materials emit ionizing radiation, while RF signals have less energy and can only cause heating
Radiation from an antenna will damage unexposed photographic film but ordinary radioactive materials do not cause this problem
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
E1B12: What is the highest modulation index permitted at the highest modulation frequency for angle modulation?
.5
1.0
2.0
3.0
E1C05: When may an automatically controlled station originate third party communications?
Never
Only when transmitting an RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
E1D03: What is a telecommand station in the amateur satellite service?
An amateur station located on the Earth's surface for communications with other Earth stations by means of Earth satellites
An amateur station that transmits communications to initiate, modify or terminate functions of a space station
An amateur station located more than 50 km above the Earth's surface
An amateur station that transmits telemetry consisting of measurements of upper atmosphere data from space
E1E09: What may be the penalty for a VE who fraudulently administers or certifies an examination?
Revocation of the VE's amateur station license grant and the suspension of the VE's amateur operator license grant
A fine of up to $1000 per occurrence
A sentence of up to one year in prison
All of these choices are correct
E1F03: Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?
It was purchased in used condition from an amateur operator and is sold to another amateur operator for use at that operator's station
The equipment dealer assembled it from a kit
It was imported from a manufacturer in a country that does not require certification of RF power amplifiers
It was imported from a manufacturer in another country, and it was certificated by that country's government
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
E2B08: Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television?
Frequency-modulated sub-carrier
A separate VHF or UHF audio link
Frequency modulation of the video carrier
All of these choices are correct
E2C12: What might help to restore contact when DX signals become too weak to copy across an entire HF band a few hours after sunset?
Switch to a higher frequency HF band
Switch to a lower frequency HF band
Wait 90 minutes or so for the signal degradation to pass
Wait 24 hours before attempting another communication on the band
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
E3A04: What type of receiving system is desirable for EME communications?
Equipment with very wide bandwidth
Equipment with very low dynamic range
Equipment with very low gain
Equipment with very low noise figures
E3B03: What is the best time of day for transequatorial propagation?
Morning
Noon
Afternoon or early evening
Late at night
E3C01: Which of the following effects does Aurora activity have on radio communications?
SSB signals are raspy
Signals propagating through the Aurora are fluttery
CW signals appear to be modulated by white noise
All of these choices are correct
E4A02: Which of the following parameters would a spectrum analyzer display on the horizontal axis?
SWR
Q
Time
Frequency
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
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
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
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
E5C18: In polar coordinates, what is the impedance of a series circuit consisting of a resistance of 4 ohms, an inductive reactance of 4 ohms, and a capacitive reactance of 1 ohm?
6.4 ohms at an angle of 53 degrees
5 ohms at an angle of 37 degrees
5 ohms at an angle of 45 degrees
10 ohms at an angle of -51 degrees
E5D15: What is the power factor of an RL circuit having a 45 degree phase angle between the voltage and the current?
0.866
1.0
0.5
0.707
E6A16: What are the majority charge carriers in N-type semiconductor material?
Holes
Free electrons
Free protons
Free neutrons
E6B05: What characteristic of a PIN diode makes it useful as an RF switch or attenuator?
Extremely high reverse breakdown voltage
Ability to dissipate large amounts of power
Reverse bias controls its forward voltage drop
A large region of intrinsic material
E6C06: Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?
Larger bypass capacitors are used in CMOS circuit design
The input switching threshold is about two times the power supply voltage
The input switching threshold is about one-half the power supply voltage
Input signals are stronger
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
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
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
E7A12: What is the name for logic which represents a logic "0" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B15: What is one way to prevent thermal runaway in a bipolar transistor amplifier?
Neutralization
Select transistors with high beta
Use a resistor in series with the emitter
All of these choices are correct
E7C05: Which filter type is described as having ripple in the passband and a sharp cutoff?
A Butterworth filter
An active LC filter
A passive op-amp filter
A Chebyshev filter
E7D08: What type of circuit is shown in Figure E7-3?
Switching voltage regulator
Grounded emitter amplifier
Linear voltage regulator
Emitter follower
E7E07: What is meant by the term baseband in radio communications?
The lowest frequency band that the transmitter or receiver covers
The frequency components present in the modulating signal
The unmodulated bandwidth of the transmitted signal
The basic oscillator frequency in an FM transmitter that is multiplied to increase the deviation and carrier frequency
E7F08: Which of the following is performed by a frequency counter?
Determining the frequency deviation with an FM discriminator
Mixing the incoming signal with a WWV reference
Counting the number of input pulses occurring within a specific period of time
Converting the phase of the measured signal to a voltage which is proportional to the frequency
E7G13: What is meant by the term op-amp input-offset voltage?
The output voltage of the op-amp minus its input voltage
The differential input voltage needed to bring the open-loop output voltage to zero
The input voltage needed to bring the open-loop output voltage to zero
The potential between the amplifier input terminals of the op-amp in an open-loop condition
E7H03: How is positive feedback supplied in a Hartley oscillator?
Through a tapped coil
Through a capacitive divider
Through link coupling
Through a neutralizing capacitor
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
E8B09: What is meant by deviation ratio?
The ratio of the audio modulating frequency to the center carrier frequency
The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency
The ratio of the carrier center frequency to the audio modulating frequency
The ratio of the highest audio modulating frequency to the average audio modulating frequency
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
E8D06: What is the advantage of using a peak-reading wattmeter to monitor the output of a SSB phone transmitter?
It is easier to determine the correct tuning of the output circuit
It gives a more accurate display of the PEP output when modulation is present
It makes it easier to detect high SWR on the feed line
It can determine if any flat-topping is present during modulation peaks
E9A03: Which of the following antennas has no gain in any direction?
Quarter-wave vertical
Yagi
Half-wave dipole
Isotropic antenna
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
E9C09: What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?
15 dB
28 dB
3 dB
24 dB
E9D14: Which of the following types of conductor would be best for minimizing losses in a station's RF ground system?
A resistive wire, such as a spark plug wire
A wide flat copper strap
A cable with 6 or 7 18-gauge conductors in parallel
A single 12 or 10-gauge stainless steel wire
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
E9F13: What impedance does a 1/4-wavelength transmission line present to a generator when the line is shorted at the far end?
Very high impedance
Very low impedance
The same as the characteristic impedance of the transmission line
The same as the generator output impedance
E9G10: What do the arcs on a Smith chart represent?
Frequency
SWR
Points with constant resistance
Points with constant reactance
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
