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
E1A12: With your transceiver displaying the carrier frequency of CW signals, you hear a DX station's CQ on 3.500 MHz. Is it legal to return the call using CW on the same frequency?
Yes, the DX station initiated the contact
Yes, the displayed frequency is within the 80 meter CW band segment
No, sidebands from the CW signal will be out of the band.
No, USA stations are not permitted to use CW emissions below 3.525 MHz
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
E1C09: Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?
18.110 - 18.168 MHz
24.940 - 24.990 MHz
10.100 - 10.150 MHz
29.500 - 29.700 MHz
E1D01: What is the definition of the term telemetry?
One-way transmission of measurements at a distance from the measuring instrument
Two-way radiotelephone transmissions in excess of 1000 feet
Two-way single channel transmissions of data
One-way transmission that initiates, modifies, or terminates the functions of a device at a distance
E1E07: What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?
Warn the candidate that continued failure to comply will result in termination of the examination
Immediately terminate the candidate's examination
Allow the candidate to complete the examination, but invalidate the results
Immediately terminate everyones examination and close the session
E1F10: What is the maximum transmitter power for an amateur station transmitting spread spectrum communications?
1 W
1.5 W
10 W
1.5 kW
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
E2B03: How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?
By scanning two fields simultaneously
By scanning each field from bottom to top
By scanning lines from left to right in one field and right to left in the next
By scanning odd numbered lines in one field and even numbered ones in the next
E2C07: What is the Cabrillo format?
A standard for submission of electronic contest logs
A method of exchanging information during a contest QSO
The most common set of contest rules
The rules of order for meetings between contest sponsors
E2D01: Which of the following digital modes is especially designed for use for meteor scatter signals?
WSPR
FSK441
Hellschreiber
APRS
E2E01: Which type of modulation is common for data emissions below 30 MHz?
DTMF tones modulating an FM signal
FSK
Pulse modulation
Spread spectrum
E3A10: Which of the following is a good technique for making meteor-scatter contacts?
15 second timed transmission sequences with stations alternating based on location
Use of high speed CW or digital modes
Short transmission with rapidly repeated call signs and signal reports
All of these choices are correct
E3B03: What is the best time of day for transequatorial propagation?
Morning
Noon
Afternoon or early evening
Late at night
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
E4A06: Which of the following could be determined with a spectrum analyzer?
The degree of isolation between the input and output ports of a 2 meter duplexer
Whether a crystal is operating on its fundamental or overtone frequency
The spectral output of a transmitter
All of these choices are correct
E4B12: What is the significance of voltmeter sensitivity expressed in ohms per volt?
The full scale reading of the voltmeter multiplied by its ohms per volt rating will provide the input impedance of the voltmeter
When used as a galvanometer, the reading in volts multiplied by the ohms/volt will determine the power drawn by the device under test
When used as an ohmmeter, the reading in ohms divided by the ohms/volt will determine the voltage applied to the circuit
When used as an ammeter, the full scale reading in amps divided by ohms/volt will determine the size of shunt needed
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
E4D09: What is the purpose of the preselector in a communications receiver?
To store often-used frequencies
To provide a range of AGC time constants
To increase rejection of unwanted signals
To allow selection of the optimum RF amplifier device
E4E09: What undesirable effect can occur when using an IF noise blanker?
Received audio in the speech range might have an echo effect
The audio frequency bandwidth of the received signal might be compressed
Nearby signals may appear to be excessively wide even if they meet emission standards
FM signals can no longer be demodulated
E5A13: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 14.25 MHz and a Q of 187?
38.1 kHz
76.2 kHz
1.332 kHz
2.665 kHz
E5B13: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 250 ohms, R is 1 kilohm, and XL is 500 ohms?
81.47 degrees with the voltage lagging the current
81.47 degrees with the voltage leading the current
14.04 degrees with the voltage lagging the current
14.04 degrees with the voltage leading 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
E5D12: How many watts are consumed in a circuit having a power factor of 0.2 if the input is 100-V AC at 4 amperes?
400 watts
80 watts
2000 watts
50 watts
E6A16: What are the majority charge carriers in N-type semiconductor material?
Holes
Free electrons
Free protons
Free neutrons
E6B07: What is the failure mechanism when a junction diode fails due to excessive current?
Excessive inverse voltage
Excessive junction temperature
Insufficient forward voltage
Charge carrier depletion
E6C09: In Figure E6-5, what is the schematic symbol for an OR gate?
2
3
4
6
E6D10: What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?
Toroidal cores confine most of the magnetic field within the core material
Toroidal cores make it easier to couple the magnetic energy into other components
Toroidal cores exhibit greater hysteresis
Toroidal cores have lower Q characteristics
E6E11: Which of the following materials is likely to provide the highest frequency of operation when used in MMICs?
Silicon
Silicon nitride
Silicon dioxide
Gallium nitride
E6F11: Which of the following is the approximate open-circuit voltage produced by a fully-illuminated silicon photovoltaic cell?
0.1 V
0.5 V
1.5 V
12 V
E7A11: What is the name for logic which represents a logic "1" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B02: What is a Class D amplifier?
A type of amplifier that uses switching technology to achieve high efficiency
A low power amplifier using a differential amplifier for improved linearity
An amplifier using drift-mode FETs for high efficiency
A frequency doubling amplifier
E7C12: Which of the following describes a Pi-L network used for matching a vacuum-tube final amplifier to a 50-ohm unbalanced output?
A Phase Inverter Load network
A Pi network with an additional series inductor on the output
A network with only three discrete parts
A matching network in which all components are isolated from ground
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
E7G11: What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 3300 ohms and RF is 47 kilohms?
28
14
7
0.07
E7H06: Which of the following oscillator circuits are commonly used in VFOs?
Pierce and Zener
Colpitts and Hartley
Armstrong and deForest
Negative feedback and balanced feedback
E8A12: What type of information can be conveyed using digital waveforms?
Human speech
Video signals
Data
All of these choices are correct
E8B03: What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, when the modulating frequency is 1000 Hz?
3
0.3
3000
1000
E8C02: What are some of the differences between the Baudot digital code and ASCII?
Baudot uses four data bits per character, ASCII uses seven or eight; Baudot uses one character as a shift code, ASCII has no shift code
Baudot uses five data bits per character, ASCII uses seven or eight; Baudot uses two characters as shift codes, ASCII has no shift code
Baudot uses six data bits per character, ASCII uses seven or eight; Baudot has no shift code, ASCII uses two characters as shift codes
Baudot uses seven data bits per character, ASCII uses eight; Baudot has no shift code, ASCII uses two characters as shift codes
E8D08: Which of the following best describes electromagnetic waves traveling in free space?
Electric and magnetic fields become aligned as they travel
The energy propagates through a medium with a high refractive index
The waves are reflected by the ionosphere and return to their source
Changing electric and magnetic fields propagate the energy
E9A03: Which of the following antennas has no gain in any direction?
Quarter-wave vertical
Yagi
Half-wave dipole
Isotropic antenna
E9B05: What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
The front-to-back ratio increases
The front-to-back ratio decreases
The frequency response is widened over the whole frequency band
The SWR is reduced
E9C10: How many elevation lobes appear in the forward direction of the antenna radiation pattern shown in Figure E9-2?
4
3
1
7
E9D11: What is the function of a loading coil as used with an HF mobile antenna?
To increase the SWR bandwidth
To lower the losses
To lower the Q
To cancel capacitive reactance
E9E08: Which of the following measurements is characteristic of a mismatched transmission line?
An SWR less than 1:1
A reflection coefficient greater than 1
A dielectric constant greater than 1
An SWR greater than 1:1
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
E9G06: On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?
Prime axis
Reactance axis
Impedance axis
Polar axis
E9H08: What is the function of a sense antenna?
It modifies the pattern of a DF antenna array to provide a null in one direction
It increases the sensitivity of a DF antenna array
It allows DF antennas to receive signals at different vertical angles
It provides diversity reception that cancels multipath signals
