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
E1A09: What is the first action you should take if your digital message forwarding station inadvertently forwards a communication that violates FCC rules?
Discontinue forwarding the communication as soon as you become aware of it
Notify the originating station that the communication does not comply with FCC rules
Notify the nearest FCC Field Engineer's office
Discontinue forwarding all messages
E1B11: What is the permitted mean power of any spurious emission relative to the mean power of the fundamental emission from a station transmitter or external RF amplifier installed after January 1, 2003, and transmitting on a frequency below 30 MHZ?
At least 43 dB below
At least 53 dB below
At least 63 dB below
At least 73 dB below
E1C01: What is a remotely controlled station?
A station operated away from its regular home location
A station controlled by someone other than the licensee
A station operating under automatic control
A station controlled indirectly through a control link
E1D11: Which amateur stations are eligible to operate as Earth stations?
Any amateur station whose licensee has filed a pre-space notification with the FCC's International Bureau
Only those of General, Advanced or Amateur Extra Class operators
Only those of Amateur Extra Class operators
Any amateur station, subject to the privileges of the class of operator license held by the control operator
E1E02: Where are the questions for all written US amateur license examinations listed?
In FCC Part 97
In a question pool maintained by the FCC
In a question pool maintained by all the VECs
In the appropriate FCC Report and Order
E1F13: What types of communications may be transmitted to amateur stations in foreign countries?
Business-related messages for non-profit organizations
Messages intended for connection to users of the maritime satellite service
Communications incidental to the purpose of the amateur service and remarks of a personal nature
All of these choices are correct
E2A04: What is meant by the term mode as applied to an amateur radio satellite?
The type of signals that can be relayed through the satellite
The satellite's uplink and downlink frequency bands
The satellite's orientation with respect to the Earth
Whether the satellite is in a polar or equatorial orbit
E2B17: What is the approximate bandwidth of a slow-scan TV signal?
600 Hz
3 kHz
2 MHz
6 MHz
E2C06: During a VHF/UHF contest, in which band segment would you expect to find the highest level of activity?
At the top of each band, usually in a segment reserved for contests
In the middle of each band, usually on the national calling frequency
In the weak signal segment of the band, with most of the activity near the calling frequency
In the middle of the band, usually 25 kHz above the national calling frequency
E2D08: Which of the following types of packet frames is used to transmit APRS beacon data?
Unnumbered Information
Disconnect
Acknowledgement
Connect
E2E12: Which type of digital communication does not support keyboard-to-keyboard operation?
Winlink
RTTY
PSK31
MFSK
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
E3B06: Which of the following amateur bands most frequently provides long-path propagation?
80 meters
20 meters
10 meters
6 meters
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
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
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
E4C13: How does a narrow-band roofing filter affect receiver performance?
It improves sensitivity by reducing front end noise
It improves intelligibility by using low Q circuitry to reduce ringing
It improves dynamic range by attenuating strong signals near the receive frequency
All of these choices are correct
E4D12: What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?
Desensitization
Quieting
Cross-modulation interference
Squelch gain rollback
E4E03: Which of the following signals might a receiver noise blanker be able to remove from desired signals?
Signals which are constant at all IF levels
Signals which appear across a wide bandwidth
Signals which appear at one IF but not another
Signals which have a sharply peaked frequency distribution
E5A05: What is the magnitude of the current at the input of a series RLC circuit as the frequency goes through resonance?
Minimum
Maximum
R/L
L/R
E5B11: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?
14 degrees with the voltage lagging the current
14 degrees with the voltage leading the current
76 degrees with the voltage lagging the current
76 degrees with the voltage leading the current
E5C21: Which point on Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and a 19 picofarad capacitor at 21.200 MHz?
Point 1
Point 3
Point 7
Point 8
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
E6A11: In Figure E6-2, what is the schematic symbol for a P-channel junction FET?
1
2
3
6
E6B13: What type of bias is required for an LED to emit light?
Reverse bias
Forward bias
Zero bias
Inductive bias
E6C01: What is the recommended power supply voltage for TTL series integrated circuits?
12 volts
1.5 volts
5 volts
13.6 volts
E6D07: What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?
From a few kHz to no more than 30 MHz
From less than 20 Hz to approximately 300 MHz
From approximately 10 Hz to no more than 3000 kHz
From about 100 kHz to at least 1000 GHz
E6E05: Which of the following noise figure values is typical of a low-noise UHF preamplifier?
2 dB
-10 dB
44 dBm
-20 dBm
E6F06: Which of these materials is affected the most by photoconductivity?
A crystalline semiconductor
An ordinary metal
A heavy metal
A liquid semiconductor
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
E7B04: Where on the load line of a Class A common emitter amplifier would bias normally be set?
Approximately half-way between saturation and cutoff
Where the load line intersects the voltage axis
At a point where the bias resistor equals the load resistor
At a point where the load line intersects the zero bias current curve
E7C13: What is one advantage of a Pi matching network over an L matching network consisting of a single inductor and a single capacitor?
The Q of Pi networks can be varied depending on the component values chosen
L networks cannot perform impedance transformation
Pi networks have fewer components
Pi networks are designed for balanced input and output
E7D03: What device is typically used as a stable reference voltage in a linear voltage regulator?
A Zener diode
A tunnel diode
An SCR
A varactor diode
E7E06: Why is de-emphasis commonly used in FM communications receivers?
For compatibility with transmitters using phase modulation
To reduce impulse noise reception
For higher efficiency
To remove third-order distortion products
E7F11: What is an advantage of a period-measuring frequency counter over a direct-count type?
It can run on battery power for remote measurements
It does not require an expensive high-precision time base
It provides improved resolution of low-frequency signals within a comparable time period
It can directly measure the modulation index of an FM transmitter
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
E7H11: What are the major spectral impurity components of direct digital synthesizers?
Broadband noise
Digital conversion noise
Spurious signals at discrete frequencies
Nyquist limit noise
E8A07: What determines the PEP-to-average power ratio of a single-sideband phone signal?
The frequency of the modulating signal
The characteristics of the modulating signal
The degree of carrier suppression
The amplifier gain
E8B02: How does the modulation index of a phase-modulated emission vary with RF carrier frequency (the modulated frequency)?
It increases as the RF carrier frequency increases
It decreases as the RF carrier frequency increases
It varies with the square root of the RF carrier frequency
It does not depend on the RF carrier frequency
E8C01: Which one of the following digital codes consists of elements having unequal length?
ASCII
AX.25
Baudot
Morse code
E8D07: What is an electromagnetic wave?
Alternating currents in the core of an electromagnet
A wave consisting of two electric fields at right angles to each other
A wave consisting of an electric field and a magnetic field oscillating at right angles to each other
A wave consisting of two magnetic fields at right angles to each other
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
E9B10: What is the principle of a Method of Moments analysis?
A wire is modeled as a series of segments, each having a uniform value of current
A wire is modeled as a single sine-wave current generator
A wire is modeled as a series of points, each having a distinct location in space
A wire is modeled as a series of segments, each having a distinct value of voltage across it
E9C09: What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?
15 dB
28 dB
3 dB
24 dB
E9D05: Where should a high-Q loading coil be placed to minimize losses in a shortened vertical antenna?
Near the center of the vertical radiator
As low as possible on the vertical radiator
As close to the transmitter as possible
At a voltage node
E9E10: Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?
Connect a 1/4-wavelength open stub of 300-ohm twin-lead in parallel with the coaxial feed line where it connects to the antenna
Insert a 1/2 wavelength piece of 300-ohm twin-lead in series between the antenna terminals and the 50-ohm feed cable
Insert a 1/4-wavelength piece of 75-ohm coaxial cable transmission line in series between the antenna terminals and the 50-ohm feed cable
Connect 1/2 wavelength shorted stub of 75-ohm cable in parallel with the 50-ohm cable where it attaches to the antenna
E9F07: How does ladder line compare to small-diameter coaxial cable such as RG-58 at 50 MHz?
Lower loss
Higher SWR
Smaller reflection coefficient
Lower velocity factor
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
E9H06: What is the triangulation method of direction finding?
The geometric angle of sky waves from the source are used to determine its position
A fixed receiving station plots three headings from the signal source on a map
Antenna headings from several different receiving locations are used to locate the signal source
A fixed receiving station uses three different antennas to plot the location of the signal source


