Ham Extra License Practice Quiz

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E0A05: What is one of the potential hazards of using microwaves in the amateur radio bands?

Microwaves are ionizing radiation
The high gain antennas commonly used can result in high exposure levels
Microwaves often travel long distances by ionospheric reflection
The extremely high frequency energy can damage the joints of antenna structures
E1A13: Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?

Only a person with an FCC Marine Radio
Any person holding an FCC-issued amateur license or who is authorized for alien reciprocal operation
Only a person named in an amateur station license grant
Any person named in an amateur station license grant or a person holding an unrestricted Radiotelephone Operator Permit
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)
E1C07: What is meant by local control?

Controlling a station through a local auxiliary link
Automatically manipulating local station controls
Direct manipulation of the transmitter by a control operator
Controlling a repeater using a portable handheld transceiver
E1D02: What is the amateur satellite service?

A radio navigation service using satellites for the purpose of self training, intercommunication and technical studies carried out by amateurs
A spacecraft launching service for amateur-built satellites
A radio communications service using amateur radio stations on satellites
A radio communications service using stations on Earth satellites for public service broadcast
E1E13: What are the consequences of failing to appear for re-administration of an examination when so directed by the FCC?

The licensee's license will be cancelled
The person may be fined or imprisoned
The licensee is disqualified from any future examination for an amateur operator license grant
All these choices are correct
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
E2A08: Why should effective radiated power to a satellite which uses a linear transponder be limited?

To prevent creating errors in the satellite telemetry
To avoid reducing the downlink power to all other users
To prevent the satellite from emitting out of band signals
To avoid interfering with terrestrial QSOs
E2B09: What hardware, other than a receiver with SSB capability and a suitable computer, is needed to decode SSTV using Digital Radio Mondiale (DRM)?

A special IF converter
A special front end limiter
A special notch filter to remove synchronization pulses
No other hardware is needed
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
E2E10: Which of these digital communications modes has the narrowest bandwidth?

MFSK16
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
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
E3B01: What is transequatorial propagation?

Propagation between two mid-latitude points at approximately the same distance north and south of the magnetic equator
Propagation between any two points located on the magnetic equator
Propagation between two continents by way of ducts along the magnetic equator
Propagation between two stations at the same latitude
E3C14: Why does the radio-path horizon distance exceed the geometric horizon?

E-region skip
D-region skip
Downward bending due to aurora refraction
Downward bending due to density variations in the atmosphere
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
E4B11: How should a portable antenna analyzer be connected when measuring antenna resonance and feed point impedance?

Loosely couple the analyzer near the antenna base
Connect the analyzer via a high-impedance transformer to the antenna
Connect the antenna and a dummy load to the analyzer
Connect the antenna feed line directly to the analyzer's connector
E4C03: What is the term for the blocking of one FM phone signal by another, stronger FM phone signal?

Desensitization
Cross-modulation interference
Capture effect
Frequency discrimination
E4D14: Which of the following is a way to reduce the likelihood of receiver desensitization?

Decrease the RF bandwidth of the receiver
Raise the receiver IF frequency
Increase the receiver front end gain
Switch from fast AGC to slow AGC
E4E08: What type of signal is picked up by electrical wiring near a radio antenna?

A common-mode signal at the frequency of the radio transmitter
An electrical-sparking signal
A differential-mode signal at the AC power line frequency
Harmonics of the AC power line frequency
E5A04: What is the magnitude of the impedance of a circuit with a resistor, an inductor and a capacitor all in parallel, at resonance?

Approximately equal to circuit resistance
Approximately equal to inductive reactance
Low, as compared to the circuit resistance
Approximately equal to capacitive reactance
E5B08: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?

14 degrees with the voltage lagging the current
14 degrees with the voltage leading the current
76 degrees with the voltage leading the current
76 degrees with the voltage lagging 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
E5D07: What determines the strength of a magnetic field around a conductor?

The resistance divided by the current
The ratio of the current to the resistance
The diameter of the conductor
The amount of current
E6A07: In Figure E6-1, what is the schematic symbol for a PNP transistor?

1
2
4
5
E6B02: What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?

Much higher reverse voltage breakdown
Controlled reverse avalanche voltage
Enhanced carrier retention time
Less forward voltage drop
E6C05: Which of the following is an advantage of CMOS logic devices over TTL devices?

Differential output capability
Lower distortion
Immune to damage from static discharge
Lower power consumption
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
E6E07: Which of the following techniques is typically used to construct a MMIC-based microwave amplifier?

Ground-plane construction
Microstrip construction
Point-to-point construction
Wave-soldering construction
E6F10: What is the most common type of photovoltaic cell used for electrical power generation?

Selenium
Silicon
Cadmium Sulfide
Copper oxide
E7A01: Which of the following is a bistable circuit?

An "AND" gate
An "OR" gate
A flip-flop
A clock
E7B09: Which of the following describes how the loading and tuning capacitors are to be adjusted when tuning a vacuum tube RF power amplifier that employs a pi-network output circuit?

The loading capacitor is set to maximum capacitance and the tuning capacitor is adjusted for minimum allowable plate current
The tuning capacitor is set to maximum capacitance and the loading capacitor is adjusted for minimum plate permissible current
The loading capacitor is adjusted to minimum plate current while alternately adjusting the tuning capacitor for maximum allowable plate current
The tuning capacitor is adjusted for minimum plate current, while the loading capacitor is adjusted for maximum permissible plate current
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
E7D04: Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?

A series current source
A series regulator
A shunt regulator
A shunt current source
E7E11: Which of the following types of detector is well suited for demodulating SSB signals?

Discriminator
Phase detector
Product detector
Phase comparator
E7F09: What is the purpose of a frequency counter?

To provide a digital representation of the frequency of a signal
To generate a series of reference signals at known frequency intervals
To display all frequency components of a transmitted signal
To provide a signal source at a very accurate frequency
E7G01: What primarily determines the gain and frequency characteristics of an op-amp RC active filter?

The values of capacitors and resistors built into the op-amp
The values of capacitors and resistors external to the op-amp
The input voltage and frequency of the op-amp's DC power supply
The output voltage and smoothness of the op-amp's DC power supply
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
E8A06: What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?

2.5 to 1
25 to 1
1 to 1
100 to 1
E8B10: Which of these methods can be used to combine several separate analog information streams into a single analog radio frequency signal?

Frequency shift keying
A diversity combiner
Frequency division multiplexing
Pulse compression
E8C01: Which one of the following digital codes consists of elements having unequal length?

ASCII
AX.25
Baudot
Morse code
E8D09: What is meant by circularly polarized electromagnetic waves?

Waves with an electric field bent into a circular shape
Waves with a rotating electric field
Waves that circle the Earth
Waves produced by a loop antenna
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
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
E9C02: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?

A cardioid
A figure-8 end-fire along the axis of the array
A figure-8 broadside to the axis of the array
Omnidirectional
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
E9E12: What is the primary purpose of a phasing line when used with an antenna having multiple driven elements?

It ensures that each driven element operates in concert with the others to create the desired antenna pattern
It prevents reflected power from traveling back down the feed line and causing harmonic radiation from the transmitter
It allows single-band antennas to operate on other bands
It makes sure the antenna has a low-angle radiation pattern
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
E9G09: What third family of circles is often added to a Smith chart during the process of solving problems?

Standing-wave ratio circles
Antenna-length circles
Coaxial-length circles
Radiation-pattern circles
E9H04: What term describes station output, including the transmitter, antenna and everything in between, when considering transmitter power and system gains and losses?

Power factor
Half-power bandwidth
Effective radiated power
Apparent power