Ham Extra License Practice Quiz

• Percentage: 0%; Correct: 0; Total: 0 of 50
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
E1A06: Which of the following describes the rules for operation on the 60 meter band?

Working DX is not permitted
Operation is restricted to specific emission types and specific channels
Operation is restricted to LSB
All of these choices are correct
E1B10: What frequencies are authorized to an amateur station participating in RACES?

All amateur service frequencies authorized to the control operator
Specific segments in the amateur service MF, HF, VHF and UHF bands
Specific local government channels
Military Affiliate Radio System (MARS) channels
E1C02: What is meant by automatic control of a station?

The use of devices and procedures for control so that the control operator does not have to be present at a control point
A station operating with its output power controlled automatically
Remotely controlling a station's antenna pattern through a directional control link
The use of a control link between a control point and a locally controlled station
E1D09: Which amateur service UHF bands have frequencies available for a space station?

70 cm
70 cm, 23 cm, 13 cm
70 cm and 33 cm
33 cm and 13 cm
E1E04: Which of the following best describes the Volunteer Examiner accreditation process?

Each General, Advanced and Amateur Extra Class operator is automatically accredited as a VE when the license is granted
The amateur operator applying must pass a VE examination administered by the FCC Enforcement Bureau
The prospective VE obtains accreditation from the FCC
The procedure by which a VEC confirms that the VE applicant meets FCC requirements to serve as an examiner
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
E2A13: What type of satellite appears to stay in one position in the sky?

HEO
Geostationary
Geomagnetic
LEO
E2B05: Which of the following is an advantage of using vestigial sideband for standard fast- scan TV transmissions?

The vestigial sideband carries the audio information
The vestigial sideband contains chroma information
Vestigial sideband reduces bandwidth while allowing for simple video detector circuitry
Vestigial sideband provides high frequency emphasis to sharpen the picture
E2C03: From which of the following bands is amateur radio contesting generally excluded?

30 meters
6 meters
2 meters
33 cm
E2D03: Which of the following digital modes is especially useful for EME communications?

FSK441
PACTOR III
Olivia
JT65
E2E10: Which of these digital communications modes has the narrowest bandwidth?

MFSK16
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
E3A07: What frequency range would you normally tune to find EME signals in the 70 cm band?

430.000 - 430.150 MHz
430.100 - 431.100 MHz
431.100 - 431.200 MHz
432.000 - 432.100 MHz
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
E3C04: Which emission mode is best for Aurora propagation?

CW
SSB
FM
RTTY
E4A02: Which of the following parameters would a spectrum analyzer display on the horizontal axis?

SWR
Q
Time
Frequency
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
E4C11: Which of the following is a desirable amount of selectivity for an amateur SSB phone receiver?

1 kHz
2.4 kHz
4.2 kHz
4.8 kHz
E4D10: What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

Signals less than 40 dBm will not generate audible third-order intermodulation products
The receiver can tolerate signals up to 40 dB above the noise floor without producing third-order intermodulation products
A pair of 40 dBm signals will theoretically generate a third-order intermodulation product with the same level as the input signals
A pair of 1 mW input signals will produce a third-order intermodulation product which is 40 dB stronger than the input signal
E4E01: Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?

Ignition noise
Broadband white noise
Heterodyne interference
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
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%
E5C06: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance capacitor in series with a 100-ohm resistor?

121 ohms at an angle of -25 degrees
191 ohms at an angle of -85 degrees
161 ohms at an angle of -65 degrees
141 ohms at an angle of -45 degrees
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
E6A14: How does DC input impedance at the gate of a field-effect transistor compare with the DC input impedance of a bipolar transistor?

They are both low impedance
An FET has low input impedance; a bipolar transistor has high input impedance
An FET has high input impedance; a bipolar transistor has low input impedance
They are both high impedance
E6B09: What is a common use for point contact diodes?

As a constant current source
As a constant voltage source
As an RF detector
As a high voltage rectifier
E6C10: In Figure E6-5, what is the schematic symbol for a NOR gate?

1
2
3
4
E6D02: Exceeding what design rating can cause a cathode ray tube (CRT) to generate X-rays?

The heater voltage
The anode voltage
The operating temperature
The operating frequency
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
E6F01: What is photoconductivity?

The conversion of photon energy to electromotive energy
The increased conductivity of an illuminated semiconductor
The conversion of electromotive energy to photon energy
The decreased conductivity of an illuminated semiconductor
E7A09: D. It produces a logic "1" at its output if any single input is a logic "1"?

It produces a logic "0" at its output only if all inputs are logic "0"
It produces a logic "1" at its output only if all inputs are logic "1"
E7B17: Why are third-order intermodulation distortion products of particular concern in linear power amplifiers?

Because they are relatively close in frequency to the desired signal
Because they are relatively far in frequency from the desired signal
Because they invert the sidebands causing distortion
Because they maintain the sidebands, thus causing multiple duplicate signals
E7C03: What advantage does a Pi-L-network have over a Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

Greater harmonic suppression
Higher efficiency
Lower losses
Greater transformation range
E7D15: What is the purpose of a "step-start" circuit in a high-voltage power supply?

To provide a dual-voltage output for reduced power applications
To compensate for variations of the incoming line voltage
To allow for remote control of the power supply
To allow the filter capacitors to charge gradually
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
E7G06: Which of the following is the most appropriate use of an op-amp active filter?

As a high-pass filter used to block RFI at the input to receivers
As a low-pass filter used between a transmitter and a transmission line
For smoothing power-supply output
As an audio filter in a receiver
E7H15: Which of these functions can be performed by a phase-locked loop?

Wide-band AF and RF power amplification
Comparison of two digital input signals, digital pulse counter
Photovoltaic conversion, optical coupling
Frequency synthesis, FM demodulation
E8A02: What type of wave has a rise time significantly faster than its fall time (or vice versa)?

A cosine wave
A square wave
A sawtooth wave
A sine wave
E8B07: When using a pulse-width modulation system, why is the transmitter's peak power greater than its average power?

The signal duty cycle is less than 100%
The signal reaches peak amplitude only when voice modulated
The signal reaches peak amplitude only when voltage spikes are generated within the modulator
The signal reaches peak amplitude only when the pulses are also amplitude modulated
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
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
E9A14: How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 12 dB gain over an isotropic antenna?

6.17 dB
9.85 dB
12.5 dB
14.15 dB
E9B03: In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?

12 dB
14 dB
18 dB
24 dB
E9C01: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed 180 degrees out of phase?

A cardioid
Omnidirectional
A figure-8 broadside to the axis of the array
A figure-8 oriented along the axis of the array
E9D09: What is an advantage of using top loading in a shortened HF vertical antenna?

Lower Q
Greater structural strength
Higher losses
Improved radiation efficiency
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
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
E9H12: What is an advantage of using a shielded loop antenna for direction finding?

It automatically cancels ignition noise pickup in mobile installations
It is electro-statically balanced against ground, giving better nulls
It eliminates tracking errors caused by strong out-of-band signals
It allows stations to communicate without giving away their position