Ham Extra License Practice Quiz

• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A11: Which of the following injuries can result from using high-power UHF or microwave transmitters?

Hearing loss caused by high voltage corona discharge
Blood clotting from the intense magnetic field
Localized heating of the body from RF exposure in excess of the MPE limits
Ingestion of ozone gas from the cooling system
E1A08: If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?

The control operator of the packet bulletin board station
The control operator of the originating station
The control operators of all the stations in the system
The control operators of all the stations in the system not authenticating the source from which they accept communications
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)
E1C04: When may an automatically controlled station retransmit third party communications?

Never
Only when transmitting RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
E1D06: Which of the following special provisions must a space station incorporate in order to comply with space station requirements?

The space station must be capable of terminating transmissions by telecommand when directed by the FCC
The space station must cease all transmissions after 5 years
The space station must be capable of changing its orbit whenever such a change is ordered by NASA
All of these choices are correct
E1E11: What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?

Photocopy all examination documents and forward them to the FCC for processing
Three VEs must certify that the examinee is qualified for the license grant and that they have complied with the administering VE requirements
Issue the examinee the new or upgrade license
All these choices are correct
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
E2A07: Which of the following types of signals can be relayed through a linear transponder?

FM and CW
SSB and SSTV
PSK and Packet
All of these choices are correct
E2B15: What signals SSTV receiving equipment to begin a new picture line?

Specific tone frequencies
Elapsed time
Specific tone amplitudes
A two-tone signal
E2C09: How does the spread-spectrum technique of frequency hopping work?

If interference is detected by the receiver it will signal the transmitter to change frequencies
If interference is detected by the receiver it will signal the transmitter to wait until the frequency is clear
A pseudo-random binary bit stream is used to shift the phase of an RF carrier very rapidly in a particular sequence
The frequency of the transmitted signal is changed very rapidly according to a particular sequence also used by the receiving station
E2D02: What is the definition of baud?

The number of data symbols transmitted per second
The number of characters transmitted per second
The number of characters transmitted per minute
The number of words transmitted per minute
E2E11: What is the difference between direct FSK and audio FSK?

Direct FSK applies the data signal to the transmitter VFO
Audio FSK has a superior frequency response
Direct FSK uses a DC-coupled data connection
Audio FSK can be performed anywhere in the transmit chain
E3A06: What frequency range would you normally tune to find EME signals in the 2 meter band?

144.000 - 144.001 MHz
144.000 - 144.100 MHz
144.100 - 144.300 MHz
145.000 - 145.100 MHz
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
E3C10: How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?

The main lobe takeoff angle increases in the downhill direction
The main lobe takeoff angle decreases in the downhill direction
The horizontal beam width decreases in the downhill direction
The horizontal beam width increases in the uphill direction
E4A07: Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge to measure antenna SWR?

Antenna analyzers automatically tune your antenna for resonance
Antenna analyzers do not need an external RF source
Antenna analyzers display a time-varying representation of the modulation envelope
All of these choices are correct
E4B08: Which of the following is a characteristic of a good DC voltmeter?

High reluctance input
Low reluctance input
High impedance input
Low impedance input
E4C15: What is the primary source of noise that can be heard from an HF receiver with an antenna connected?

Detector noise
Induction motor noise
Receiver front-end noise
Atmospheric noise
E4D11: Why are third-order intermodulation products created within a receiver of particular interest compared to other products?

The third-order product of two signals which are in the band of interest is also likely to be within the band
The third-order intercept is much higher than other orders
Third-order products are an indication of poor image rejection
Third-order intermodulation produces three products for every input signal within the band of interest
E4E14: What is one type of electrical interference that might be caused by the operation of a nearby personal computer?

A loud AC hum in the audio output of your station receiver
A clicking noise at intervals of a few seconds
The appearance of unstable modulated or unmodulated signals at specific frequencies
A whining type noise that continually pulses off and on
E5A15: What is the resonant frequency of a series RLC circuit if R is 56 ohms, L is 40 microhenrys and C is 200 picofarads?

3.76 MHz
1.78 MHz
11.18 MHz
22.36 MHz
E5B03: The capacitor in an RC circuit is discharged to what percentage of the starting voltage after two time constants?

86.5%
63.2%
36.8%
13.5%
E5C16: In polar coordinates, what is the impedance of a circuit that has an admittance of 7.09 millisiemens at 45 degrees?

5.03 E-06 ohms at an angle of 45 degrees
141 ohms at an angle of -45 degrees
19,900 ohms at an angle of -45 degrees
141 ohms at an angle of 45 degrees
E5D04: What unit measures electrical energy stored in an electrostatic field?

Coulomb
Joule
Watt
Volt
E6A02: Which of the following semiconductor materials contains excess free electrons?

N-type
P-type
Bipolar
Insulated gate
E6B10: In Figure E6-3, what is the schematic symbol for a light-emitting diode?

1
5
6
7
E6C02: What logic state do the inputs of a TTL device assume if they are left open?

A logic-high state
A logic-low state
The device becomes randomized and will not provide consistent high or low-logic states
Open inputs on a TTL device are ignored
E6D13: What type of CRT deflection is better when high-frequency waveforms are to be displayed on the screen?

Electromagnetic
Tubular
Radar
Electrostatic
E6E05: Which of the following noise figure values is typical of a low-noise UHF preamplifier?

2 dB
-10 dB
44 dBm
-20 dBm
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
E7A05: Which of the following is a circuit that continuously alternates between two states without an external clock?

Monostable multivibrator
J-K flip-flop
T flip-flop
Astable multivibrator
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
E7C14: Which of these modes is most affected by non-linear phase response in a receiver IF filter?

Meteor Scatter
Single-Sideband voice
Digital
Video
E7D09: What is the purpose of C1 in the circuit shown in Figure E7-3?

It resonates at the ripple frequency
It provides fixed bias for Q1
It decouples the output
It filters the supply voltage
E7E11: Which of the following types of detector is well suited for demodulating SSB signals?

Discriminator
Phase detector
Product detector
Phase comparator
E7F07: What determines the accuracy of a frequency counter?

The accuracy of the time base
The speed of the logic devices used
Accuracy of the AC input frequency to the power supply
Proper balancing of the mixer diodes
E7G07: What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

0.21
94
47
24
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
E8A14: Which of these methods is commonly used to convert analog signals to digital signals?

Sequential sampling
Harmonic regeneration
Level shifting
Phase reversal
E8B12: What is digital time division multiplexing?

Two or more data streams are assigned to discrete sub-carriers on an FM transmitter
Two or more signals are arranged to share discrete time slots of a data transmission
Two or more data streams share the same channel by transmitting time of transmission as the sub-carrier
Two or more signals are quadrature modulated to increase bandwidth efficiency
E8C03: What is one advantage of using the ASCII code for data communications?

It includes built-in error-correction features
It contains fewer information bits per character than any other code
It is possible to transmit both upper and lower case text
It uses one character as a shift code to send numeric and special characters
E8D12: What is the peak voltage of a sinusoidal waveform if an RMS-reading voltmeter reads 34 volts?

123 volts
96 volts
55 volts
48 volts
E9A04: Why would one need to know the feed point impedance of an antenna?

To match impedances in order to minimize standing wave ratio on the transmission line
To measure the near-field radiation density from a transmitting antenna
To calculate the front-to-side ratio of the antenna
To calculate the front-to-back ratio of the 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
E9C08: What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?

45 degrees
75 degrees
7.5 degrees
25 degrees
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
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