Ham Extra License Practice Quiz


• Percentage: 0%; Correct: 0; Total: 0 of 50

E0A02: When evaluating RF exposure levels from your station at a neighbor's home, what must you do?

Make sure signals from your station are less than the controlled MPE limits
Make sure signals from your station are less than the uncontrolled MPE limits
You need only evaluate exposure levels on your own property
Advise your neighbors of the results of your tests

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

E1B06: Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?

You may have to notify the Federal Aviation Administration and register it with the FCC as required by Part 17 of FCC rules
No special rules apply if your antenna structure will be less than 300 feet in height
You must file an Environmental Impact Statement with the EPA before construction begins
You must obtain a construction permit from the airport zoning authority

E1C10: What types of amateur stations may automatically retransmit the radio signals of other amateur stations?

Only beacon, repeater or space stations
Only auxiliary, repeater or space stations
Only earth stations, repeater stations or model craft
Only auxiliary, beacon or space stations

E1D05: What class of licensee is authorized to be the control operator of a space station?

All except Technician Class
Only General, Advanced or Amateur Extra Class
All classes
Only Amateur Extra Class

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

E1F04: Which of the following geographic descriptions approximately describes "Line A"?

A line roughly parallel to and south of the US-Canadian border
A line roughly parallel to and west of the US Atlantic coastline
A line roughly parallel to and north of the US-Mexican border and Gulf coastline
A line roughly parallel to and east of the US Pacific coastline

E2A05: What do the letters in a satellite's mode designator specify?

Power limits for uplink and downlink transmissions
The location of the ground control station
The polarization of uplink and downlink signals
The uplink and downlink frequency ranges

E2B19: What special operating frequency restrictions are imposed on slow scan TV transmissions?

None; they are allowed on all amateur frequencies
They are restricted to 7.245 MHz, 14.245 MHz, 21.345, MHz, and 28.945 MHz
They are restricted to phone band segments and their bandwidth can be no greater than that of a voice signal of the same modulation type
They are not permitted above 54 MHz

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

E2D09: Under clear communications conditions, which of these digital communications modes has the fastest data throughput?

AMTOR
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet

E2E03: How is Forward Error Correction implemented?

By the receiving station repeating each block of three data characters
By transmitting a special algorithm to the receiving station along with the data characters
By transmitting extra data that may be used to detect and correct transmission errors
By varying the frequency shift of the transmitted signal according to a predefined algorithm

E3A08: When a meteor strikes the Earth's atmosphere, a cylindrical region of free electrons is formed at what layer of the ionosphere?

The E layer
The F1 layer
The F2 layer
The D layer

E3B11: Which of the following describes gray-line propagation?

Backscatter contacts on the 10 meter band
Over the horizon propagation on the 6 and 2 meter bands
Long distance communications at twilight on frequencies less than 15 MHz
Tropospheric propagation on the 2 meter and 70 centimeter bands

E3C06: By how much does the VHF/UHF radio-path horizon distance exceed the geometric horizon?

By approximately 15% of the distance
By approximately twice the distance
By approximately one-half the distance
By approximately four times the distance

E4A03: Which of the following parameters would a spectrum analyzer display on the vertical axis?

Amplitude
Duration
SWR
Q

E4B14: What happens if a dip meter is too tightly coupled to a tuned circuit being checked?

Harmonics are generated
A less accurate reading results
Cross modulation occurs
Intermodulation distortion occurs

E4C06: A CW receiver with the AGC off has an equivalent input noise power density of -174 dBm/Hz. What would be the level of an unmodulated carrier input to this receiver that would yield an audio output SNR of 0 dB in a 400 Hz noise bandwidth?

174 dBm
-164 dBm
-155 dBm
-148 dBm

E4D01: What is meant by the blocking dynamic range of a receiver?

The difference in dB between the noise floor and thelevel of an incoming signal which will cause 1 dB of gain compression
The minimum difference in dB between the levels of two FM signals which will cause one signal to block the other
The difference in dB between the noise floor and the third order intercept point
The minimum difference in dB between two signals which produce third order intermodulation products greater than the noise floor

E4E13: What might be the cause of a loud roaring or buzzing AC line interference that comes and goes at intervals?

Arcing contacts in a thermostatically controlled device
A defective doorbell or doorbell transformer inside a nearby residence
A malfunctioning illuminated advertising display
All of these choices are correct

E5A07: What is the magnitude of the current at the input of a parallel RLC circuit at resonance?

Minimum
Maximum
R/L
L/R

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

E5C01: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance inductor in series with a 100-ohm resistor?

121 ohms at an angle of 35 degrees
141 ohms at an angle of 45 degrees
161 ohms at an angle of 55 degrees
181 ohms at an angle of 65 degrees

E5D16: What is the power factor of an RL circuit having a 30 degree phase angle between the voltage and the current?

1.73
0.5
0.866
0.577

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

E6B11: What is used to control the attenuation of RF signals by a PIN diode?

Forward DC bias current
A sub-harmonic pump signal
Reverse voltage larger than the RF signal
Capacitance of an RF coupling capacitor

E6C11: In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?

2
4
5
6

E6D12: How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?

35 turns
13 turns
79 turns
141 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

E6F07: What is a solid state relay?

A relay using transistors to drive the relay coil
A device that uses semiconductor devices to implement the functions of an electromechanical relay
A mechanical relay that latches in the on or off state each time it is pulsed
A passive delay line

E7A15: What is a D flip-flop?

A flip-flop whose output takes on the state of the D input when the clock signal transitions from low to high
A differential class D amplifier used as a flip-flop circuit
A dynamic memory storage element
A flip-flop whose output is capable of both positive and negative voltage excursions

E7B01: For what portion of a signal cycle does a Class AB amplifier operate?

More than 180 degrees but less than 360 degrees
Exactly 180 degrees
The entire cycle
Less than 180 degrees

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

E7D17: What is the primary reason that a high-frequency inverter type high-voltage power supply can be both less expensive and lighter in weight than a conventional power supply?

The inverter design does not require any output filtering
It uses a diode bridge rectifier for increased output
The high frequency inverter design uses much smaller transformers and filter components for an equivalent power output
It uses a large power-factor compensation capacitor to create "free power" from the unused portion of the AC cycle

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

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

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

E7H07: What is a magnetron oscillator?

An oscillator in which the output is fed back to the input by the magnetic field of a transformer
A crystal oscillator in which variable frequency is obtained by placing the crystal in a strong magnetic field
A UHF or microwave oscillator consisting of a diode vacuum tube with a specially shaped anode, surrounded by an external magnet
A reference standard oscillator in which the oscillations are synchronized by magnetic coupling to a rubidium gas tube

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

E8B05: What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?

60
0.167
0.6
1.67

E8C04: What technique is used to minimize the bandwidth requirements of a PSK31 signal?

Zero-sum character encoding
Reed-Solomon character encoding
Use of sinusoidal data pulses
Use of trapezoidal data pulses

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

E9A10: How is antenna efficiency calculated?

(radiation resistance / transmission resistance) x 100%
(radiation resistance / total resistance) x 100%
(total resistance / radiation resistance) x 100%
(effective radiated power / transmitter output) x 100%

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

E9D12: What is one advantage of using a trapped antenna?

It has high directivity in the higher-frequency bands
It has high gain
It minimizes harmonic radiation
It may be used for multiband operation

E9E07: What term best describes the interactions at the load end of a mismatched transmission line?

Characteristic impedance
Reflection coefficient
Velocity factor
Dielectric constant

E9F01: What is the velocity factor of a transmission line?

The ratio of the characteristic impedance of the line to the terminating impedance
The index of shielding for coaxial cable
The velocity of the wave in the transmission line multiplied by the velocity of light in a vacuum
The velocity of the wave in the transmission line divided by the velocity of light in a vacuum

E9G01: Which of the following can be calculated using a Smith chart?

Impedance along transmission lines
Radiation resistance
Antenna radiation pattern
Radio propagation

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