Ham Extra License Practice Quiz
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E0A01: What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna?
There is no significant difference between the two types of radiation
Only radiation produced by radioactivity can injure human beings
Radioactive materials emit ionizing radiation, while RF signals have less energy and can only cause heating
Radiation from an antenna will damage unexposed photographic film but ordinary radioactive materials do not cause this problem
E1A03: With your transceiver displaying the carrier frequency of phone signals, you hear a DX station's CQ on 14.349 MHz USB. Is it legal to return the call using upper sideband on the same frequency?
Yes, because the DX station initiated the contact
Yes, because the displayed frequency is within the 20 meter band
No, my sidebands will extend beyond the band edge
No, USA stations are not permitted to use phone emissions above 14.340 MHz
E1B01: Which of the following constitutes a spurious emission?
An amateur station transmission made at random without the proper call sign identification
A signal transmitted to prevent its detection by any station other than the intended recipient
Any transmitted bogus signal that interferes with another licensed radio station
An emission outside its necessary bandwidth that can be reduced or eliminated without affecting the information transmitted
E1C05: When may an automatically controlled station originate third party communications?
Never
Only when transmitting an RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
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
E1E01: What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?
5
2
4
3
E1F03: Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?
It was purchased in used condition from an amateur operator and is sold to another amateur operator for use at that operator's station
The equipment dealer assembled it from a kit
It was imported from a manufacturer in a country that does not require certification of RF power amplifiers
It was imported from a manufacturer in another country, and it was certificated by that country's government
E2A02: What is the direction of a descending pass for an amateur satellite?
From north to south
From west to east
From east to west
From south to north
E2B18: On which of the following frequencies is one likely to find FM ATV transmissions?
14.230 MHz
29.6 MHz
52.525 MHz
1255 MHz
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
E2E05: How does ARQ accomplish error correction?
Special binary codes provide automatic correction
Special polynomial codes provide automatic correction
If errors are detected, redundant data is substituted
If errors are detected, a retransmission is requested
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
E3B07: Which of the following could account for hearing an echo on the received signal of a distant station?
High D layer absorption
Meteor scatter
Transmit frequency is higher than the MUF
Receipt of a signal by more than one path
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
E4A10: Which of the following tests establishes that a silicon NPN junction transistor is biased on?
Measure base-to-emitter resistance with an ohmmeter; it should be approximately
Measure base-to-emitter resistance with an ohmmeter; it should be approximately 0.6 to 0.7 ohms
Measure base-to-emitter voltage with a voltmeter; it should be approximately
Measure base-to-emitter voltage with a voltmeter; it should be approximately
E4B13: How is the compensation of an oscilloscope probe typically adjusted?
A square wave is displayed and the probe is adjusted until the horizontal portions of the displayed wave are as nearly flat as possible
A high frequency sine wave is displayed and the probe is adjusted for maximum amplitude
A frequency standard is displayed and the probe is adjusted until the deflection time is accurate
A DC voltage standard is displayed and the probe is adjusted until the displayed voltage is accurate
E4C02: Which of the following portions of a receiver can be effective in eliminating image signal interference?
A front-end filter or pre-selector
A narrow IF filter
A notch filter
A properly adjusted product detector
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
E4E04: How can conducted and radiated noise caused by an automobile alternator be suppressed?
By installing filter capacitors in series with the DC power lead and by installing a blocking capacitor in the field lead
By installing a noise suppression resistor and a blocking capacitor in both leads
By installing a high-pass filter in series with the radio's power lead and a low-pass filter in parallel with the field lead
By connecting the radio's power leads directly to the battery and by installing coaxial capacitors in line with the alternator leads
E5A11: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?
157.8 Hz
315.6 Hz
47.3 kHz
23.67 kHz
E5B10: What is the relationship between the current through an inductor and the voltage across an inductor?
Voltage leads current by 90 degrees
Current leads voltage by 90 degrees
Voltage and current are 180 degrees out of phase
Voltage and current are in phase
E5C22: In rectangular coordinates, what is the impedance of a network consisting of a 10-microhenry inductor in series with a 40-ohm resistor at 500 MHz?
40 + j31,400
40 - j31,400
31,400 + j40
31,400 - j40
E5D03: What device is used to store electrical energy in an electrostatic field?
A battery
A transformer
A capacitor
An inductor
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
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
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
E6D03: Which of the following is true of a charge-coupled device (CCD)?
Its phase shift changes rapidly with frequency
It is a CMOS analog-to-digital converter
It samples an analog signal and passes it in stages from the input to the output
It is used in a battery charger circuit
E6E02: Which of the following factors has the greatest effect in helping determine the bandwidth and response shape of a crystal ladder filter?
The relative frequencies of the individual crystals
The DC voltage applied to the quartz crystal
The gain of the RF stage preceding the filter
The amplitude of the signals passing through the filter
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
E7A12: What is the name for logic which represents a logic "0" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic
E7B08: How can an RF power amplifier be neutralized?
By increasing the driving power
By reducing the driving power
By feeding a 180-degree out-of-phase portion of the output back to the input
By feeding an in-phase component of the output back to the input
E7C01: How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?
Two inductors are in series between the input and output, and a capacitor is connected between the two inductors and ground
Two capacitors are in series between the input and output and an inductor is connected between the two capacitors and ground
An inductor is connected between the input and ground, another inductor is connected between the output and ground, and a capacitor is connected between the input and output
A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between input and output
E7D07: What is the purpose of C2 in the circuit shown in Figure E7-3?
It bypasses hum around D1
It is a brute force filter for the output
To self-resonate at the hum frequency
To provide fixed DC bias for Q1
E7E12: What is a frequency discriminator stage in a FM receiver?
An FM generator circuit
A circuit for filtering two closely adjacent signals
An automatic band-switching circuit
A circuit for detecting FM signals
E7F06: What is one purpose of a marker generator?
To add audio markers to an oscilloscope
To provide a frequency reference for a phase locked loop
To provide a means of calibrating a receiver's frequency settings
To add time signals to a transmitted signal
E7G02: What is the effect of ringing in a filter?
An echo caused by a long time delay
A reduction in high frequency response
Partial cancellation of the signal over a range of frequencies
Undesired oscillations added to the desired signal
E7H04: How is positive feedback supplied in a Colpitts oscillator?
Through a tapped coil
Through link coupling
Through a capacitive divider
Through a neutralizing capacitor
E8A12: What type of information can be conveyed using digital waveforms?
Human speech
Video signals
Data
All of these choices are correct
E8B08: What parameter does the modulating signal vary in a pulse-position modulation system?
The number of pulses per second
The amplitude of the pulses
The duration of the pulses
The time at which each pulse occurs
E8C07: What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?
15.36 kHz
9.6 kHz
4.8 kHz
5.76 kHz
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
E9A07: What is a folded dipole antenna?
A dipole one-quarter wavelength long
A type of ground-plane antenna
A dipole constructed from one wavelength of wire forming a very thin loop
A dipole configured to provide forward gain
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
E9C04: Which of the following describes a basic unterminated rhombic antenna?
Unidirectional; four-sides, each side one quarter-wavelength long; terminated in a resistance equal to its characteristic impedance
Bidirectional; four-sides, each side one or more wavelengths long; open at the end opposite the transmission line connection
Four-sides; an LC network at each corner except for the transmission connection;
Four-sides, each of a different physical length
E9D02: How can linearly polarized Yagi antennas be used to produce circular polarization?
Stack two Yagis, fed 90 degrees out of phase, to form an array with the respective elements in parallel planes
Stack two Yagis, fed in phase, to form an array with the respective elements in parallel planes
Arrange two Yagis perpendicular to each other with the driven elements at the same point on the boom and fed 90 degrees out of phase
Arrange two Yagis collinear to each other, with the driven elements fed 180 degrees out of phase
E9E13: What is the purpose of a Wilkinson divider?
It divides the operating frequency of a transmitter signal so it can be used on a lower frequency band
It is used to feed high-impedance antennas from a low-impedance source
It divides power equally among multiple loads while preventing changes in one load from disturbing power flow to the others
It is used to feed low-impedance loads from a high-impedance source
E9F12: What impedance does a 1/4-wavelength transmission line present to a generator when the line is open at the far end?
The same as the characteristic impedance of the line
The same as the input impedance to the generator
Very high impedance
Very low impedance
E9G11: How are the wavelength scales on a Smith chart calibrated?
In fractions of transmission line electrical frequency
In fractions of transmission line electrical wavelength
In fractions of antenna electrical wavelength
In fractions of antenna electrical frequency
E9H09: Which of the following describes the construction of a receiving loop antenna?
A large circularly-polarized antenna
A small coil of wire tightly wound around a toroidal ferrite core
One or more turns of wire wound in the shape of a large open coil
A vertical antenna coupled to a feed line through an inductive loop of wire
