Ham Extra License Practice Quiz


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E0A08: What does SAR measure?

Synthetic Aperture Ratio of the human body
Signal Amplification Rating
The rate at which RF energy is absorbed by the body
The rate of RF energy reflected from stationary terrain

E1A07: What is the only amateur band where transmission on specific channels rather than a range of frequencies is permitted?

12 meter band
17 meter band
30 meter band
60 meter band

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

E1C09: Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?

18.110 - 18.168 MHz
24.940 - 24.990 MHz
10.100 - 10.150 MHz
29.500 - 29.700 MHz

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

E1E08: To which of the following examinees may a VE not administer an examination?

Employees of the VE
Friends of the VE
Relatives of the VE as listed in the FCC rules
All of these choices are correct

E1F14: Under what circumstances might the FCC issue a "Special Temporary Authority" (STA) to an amateur station?

To provide for experimental amateur communications
To allow regular operation on Land Mobile channels
To provide additional spectrum for personal use
To provide temporary operation while awaiting normal licensing

E2A03: What is the orbital period of an Earth satellite?

The point of maximum height of a satellite's orbit
The point of minimum height of a satellite's orbit
The time it takes for a satellite to complete one revolution around the Earth
The time it takes for a satellite to travel from perigee to apogee

E2B16: Which of the following is the video standard used by North American Fast Scan ATV stations?

PAL
DRM
Scottie
NTSC

E2C04: On which of the following frequencies is an amateur radio contest contact generally discouraged?

3.525 MHz
14.020 MHz
28.330 MHz
146.52 MHz

E2D08: Which of the following types of packet frames is used to transmit APRS beacon data?

Unnumbered Information
Disconnect
Acknowledgement
Connect

E2E08: Which of the following HF digital modes can be used to transfer binary files?

Hellschreiber
PACTOR
RTTY
AMTOR

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

E3B08: What type of HF propagation is probably occurring if radio signals travel along the terminator between daylight and darkness?

Transequatorial
Sporadic-E
Long-path
Gray-line

E3C07: How does the radiation pattern of a horizontally polarized 3-element beam antenna vary with its height above ground?

The main lobe takeoff angle increases with increasing height
The main lobe takeoff angle decreases with increasing height
The horizontal beam width increases with height
The horizontal beam width decreases with height

E4A08: Which of the following instruments would be best for measuring the SWR of a beam antenna?

A spectrum analyzer
A Q meter
An ohmmeter
An antenna analyzer

E4B15: Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?

The inductance to capacitance ratio
The frequency shift
The bandwidth of the circuit's frequency response
The resonant frequency of the circuit

E4C05: What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?

The minimum detectable signal as a function of receive frequency
The theoretical noise at the input of a perfect receiver at room temperature
The noise figure of a 1 Hz bandwidth receiver
The galactic noise contribution to minimum detectable signal

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

E4E09: What undesirable effect can occur when using an IF noise blanker?

Received audio in the speech range might have an echo effect
The audio frequency bandwidth of the received signal might be compressed
Nearby signals may appear to be excessively wide even if they meet emission standards
FM signals can no longer be demodulated

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

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

E5C15: In polar coordinates, what is the impedance of a circuit of 100 -j100 ohms impedance?

141 ohms at an angle of -45 degrees
100 ohms at an angle of 45 degrees
100 ohms at an angle of -45 degrees
141 ohms at an angle of 45 degrees

E5D08: What type of energy is stored in an electromagnetic or electrostatic field?

Electromechanical energy
Potential energy
Thermodynamic energy
Kinetic energy

E6A06: What is the beta of a bipolar junction transistor?

The frequency at which the current gain is reduced to 1
The change in collector current with respect to base current
The breakdown voltage of the base to collector junction
The switching speed of the transistor

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

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

E6C12: What is BiCMOS logic?

A logic device with two CMOS circuits per package
An FET logic family based on bimetallic semiconductors
A logic family based on bismuth CMOS devices
An integrated circuit logic family using both bipolar and CMOS transistors

E6D11: How many turns will be required to produce a 1-mH inductor using a ferrite toroidal core that has an inductance index (A L) value of 523 millihenrys/1000 turns?

2 turns
4 turns
43 turns
229 turns

E6E09: Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?

Provide the crystal with a specified parallel inductance
Provide the crystal with a specified parallel capacitance
Bias the crystal at a specified voltage
Bias the crystal at a specified current

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.

E7A10: What is a truth table?

A table of logic symbols that indicate the high logic states of an op-amp
A diagram showing logic states when the digital device's output is true
A list of inputs and corresponding outputs for a digital device
A table of logic symbols that indicates the low logic states of an op-amp

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

E7C09: What type of digital signal processing filter might be used to generate an SSB signal?

An adaptive filter
A notch filter
A Hilbert-transform filter
An elliptical filter

E7D14: What is one purpose of a "bleeder" resistor in a conventional (unregulated) power supply?

To cut down on waste heat generated by the power supply
To balance the low-voltage filament windings
To improve output voltage regulation
To boost the amount of output current

E7E13: Which of the following describes a common means of generating an SSB signal when using digital signal processing?

Mixing products are converted to voltages and subtracted by adder circuits
A frequency synthesizer removes the unwanted sidebands
Emulation of quartz crystal filter characteristics
The quadrature method

E7F02: Which of the following would be used to reduce a signal's frequency by a factor of ten?

A preamp
A prescaler
A marker generator
A flip-flop

E7G02: What is the effect of ringing in a filter?

An echo caused by a long time delay
A reduction in high frequency response
Partial cancellation of the signal over a range of frequencies
Undesired oscillations added to the desired signal

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

E8A03: What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics?

A sawtooth wave
A square wave
A sine wave
A cosine wave

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

E8C10: What spread-spectrum communications technique alters the center frequency of a conventional carrier many times per second in accordance with a pseudo-random list of channels?

Frequency hopping
Direct sequence
Time-domain frequency modulation
Frequency compandored spread-spectrum

E8D11: What is the average power dissipated by a 50-ohm resistive load during one complete RF cycle having a peak voltage of 35 volts?

12.2 watts
9.9 watts
24.5 watts
16 watts

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

E9B07: How does the total amount of radiation emitted by a directional gain antenna compare with the total amount of radiation emitted from an isotropic antenna, assuming each is driven by the same amount of power?

The total amount of radiation from the directional antenna is increased by the gain of the antenna
The total amount of radiation from the directional antenna is stronger by its front to back ratio
They are the same
The radiation from the isotropic antenna is 2.15 dB stronger than that from the directional antenna

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

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

E9E05: How must the driven element in a 3-element Yagi be tuned to use a hairpin matching system?

The driven element reactance must be capacitive
The driven element reactance must be inductive
The driven element resonance must be lower than the operating frequency
The driven element radiation resistance must be higher than the characteristic impedance of the transmission line

E9F12: What impedance does a 1/4-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
The same as the input impedance to the generator
Very high impedance
Very low impedance

E9G02: What type of coordinate system is used in a Smith chart?

Voltage circles and current arcs
Resistance circles and reactance arcs
Voltage lines and current chords
Resistance lines and reactance chords

E9H03: What is the effective isotropic radiated power of a repeater station with 200 watts transmitter power output, 2-dB feed line loss, 2.8-dB duplexer loss, 1.2-dB circulator loss and 7-dBi antenna gain?

159 watts
252 watts
632 watts
63.2 watts