Ham Extra License Practice Quiz
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E0A06: Why are there separate electric (E) and magnetic (H) field MPE limits?
The body reacts to electromagnetic radiation from both the E and H fields
Ground reflections and scattering make the field impedance vary with location
E field and H field radiation intensity peaks can occur at different locations
All of these choices are correct
E1A05: What is the maximum power output permitted on the 60 meter band?
50 watts PEP effective radiated power relative to an isotropic radiator
50 watts PEP effective radiated power relative to a dipole
100 watts PEP effective radiated power relative to the gain of a half-wave dipole
100 watts PEP effective radiated power relative to an isotropic radiator
E1B04: What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historical Places?
A proposal must be submitted to the National Park Service
A letter of intent must be filed with the National Audubon Society
An Environmental Assessment must be submitted to the FCC
A form FSD-15 must be submitted to the Department of the Interior
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
E1D07: Which amateur service HF bands have frequencies authorized to space stations?
Only 40m, 20m, 17m, 15m, 12m and 10m
Only 40m, 20m, 17m, 15m and 10m bands
40m, 30m, 20m, 15m, 12m and 10m bands
All HF bands
E1E14: For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?
Preparing, processing, administering and coordinating an examination for an amateur radio license
Teaching an amateur operator license examination preparation course
No expenses are authorized for reimbursement
Providing amateur operator license examination preparation training materials
E1F14: Under what circumstances might the FCC issue a "Special Temporary Authority" (STA) to an amateur station?
To provide for experimental amateur communications
To allow regular operation on Land Mobile channels
To provide additional spectrum for personal use
To provide temporary operation while awaiting normal licensing
E2A03: What is the orbital period of an Earth satellite?
The point of maximum height of a satellite's orbit
The point of minimum height of a satellite's orbit
The time it takes for a satellite to complete one revolution around the Earth
The time it takes for a satellite to travel from perigee to apogee
E2B13: How many lines are commonly used in each frame on an amateur slow-scan color television picture?
30 to 60
60 or 100
128 or 256
180 or 360
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
E2D07: Which of the following digital protocols is used by APRS?
PACTOR
802.11
AX.25
AMTOR
E2E03: How is Forward Error Correction implemented?
By the receiving station repeating each block of three data characters
By transmitting a special algorithm to the receiving station along with the data characters
By transmitting extra data that may be used to detect and correct transmission errors
By varying the frequency shift of the transmitted signal according to a predefined algorithm
E3A09: Which of the following frequency ranges is well suited for meteor-scatter communications?
1.8 - 1.9 MHz
10 - 14 MHz
28 - 148 MHz
220 - 450 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
E3C06: By how much does the VHF/UHF radio-path horizon distance exceed the geometric horizon?
By approximately 15% of the distance
By approximately twice the distance
By approximately one-half the distance
By approximately four times the distance
E4A02: Which of the following parameters would a spectrum analyzer display on the horizontal axis?
SWR
Q
Time
Frequency
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
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
E4E10: What is a common characteristic of interference caused by a touch controlled electrical device?
The interfering signal sounds like AC hum on an AM receiver or a carrier modulated by 60 Hz hum on a SSB or CW receiver
The interfering signal may drift slowly across the HF spectrum
The interfering signal can be several kHz in width and usually repeats at regular intervals across a HF band
All of these choices are correct
E5A02: What is resonance in an electrical circuit?
The highest frequency that will pass current
The lowest frequency that will pass current
The frequency at which the capacitive reactance equals the inductive reactance
The frequency at which the reactive impedance equals the resistive impedance
E5B01: What is the term for the time required for the capacitor in an RC circuit to be charged to 63.2% of the applied voltage?
An exponential rate of one
One time constant
One exponential period
A time factor of one
E5C10: When using rectangular coordinates to graph the impedance of a circuit, what does the vertical axis represent?
Resistive component
Reactive component
The sum of the reactive and resistive components
The difference between the resistive and reactive components
E5D03: What device is used to store electrical energy in an electrostatic field?
A battery
A transformer
A capacitor
An inductor
E6A11: In Figure E6-2, what is the schematic symbol for a P-channel junction FET?
1
2
3
6
E6B03: What special type of diode is capable of both amplification and oscillation?
Point contact
Zener
Tunnel
Junction
E6C11: In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?
2
4
5
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
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
E6F10: What is the most common type of photovoltaic cell used for electrical power generation?
Selenium
Silicon
Cadmium Sulfide
Copper oxide
E7A08: What logical operation does an OR gate perform?
It produces a logic "1" at its output if any or all inputs are logic "1"
It produces a logic "0" at its output if all inputs are logic "1"
It only produces a logic "0" at its output when all inputs are logic "1"
It produces a logic "1" at its output if all inputs are logic "0"
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
E7C10: Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?
A crystal filter
A cavity filter
A DSP filter
An L-C filter
E7D11: What is the purpose of R1 in the circuit shown in Figure E7-3?
It provides a constant load to the voltage source
It couples hum to D1
It supplies current to D1
It bypasses hum around D1
E7E13: Which of the following describes a common means of generating an SSB signal when using digital signal processing?
Mixing products are converted to voltages and subtracted by adder circuits
A frequency synthesizer removes the unwanted sidebands
Emulation of quartz crystal filter characteristics
The quadrature method
E7F04: What additional circuitry must be added to a 100-kHz crystal-controlled marker generator so as to provide markers at 50 and 25 kHz?
An emitter-follower
Two frequency multipliers
Two flip-flops
A voltage divider
E7G01: What primarily determines the gain and frequency characteristics of an op-amp RC active filter?
The values of capacitors and resistors built into the op-amp
The values of capacitors and resistors external to the op-amp
The input voltage and frequency of the op-amp's DC power supply
The output voltage and smoothness of the op-amp's DC power supply
E7H05: How is positive feedback supplied in a Pierce oscillator?
Through a tapped coil
Through link coupling
Through a neutralizing capacitor
Through a quartz crystal
E8A01: What type of wave is made up of a sine wave plus all of its odd harmonics?
A square wave
A sine wave
A cosine wave
A tangent wave
E8B01: What is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal?
FM compressibility
Quieting index
Percentage of modulation
Modulation index
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
E8D03: What input-amplitude parameter is valuable in evaluating the signal-handling capability of a Class A amplifier?
Peak voltage
RMS voltage
Average power
Resting voltage
E9A09: What is meant by antenna bandwidth?
Antenna length divided by the number of elements
The frequency range over which an antenna satisfies a performance requirement
The angle between the half-power radiation points
The angle formed between two imaginary lines drawn through the element ends
E9B06: If the boom of a Yagi antenna is lengthened and the elements are properly retuned, what usually occurs?
The gain increases
The SWR decreases
The front-to-back ratio increases
The gain bandwidth decreases rapidly
E9C03: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed in phase?
Omnidirectional
A cardioid
A Figure-8 broadside to the axis of the array
A Figure-8 end-fire along the axis of the array
E9D01: How does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?
Gain does not change
Gain is multiplied by 0.707
Gain increases by 6 dB
Gain increases by 3 dB
E9E05: How must the driven element in a 3-element Yagi be tuned to use a hairpin matching system?
The driven element reactance must be capacitive
The driven element reactance must be inductive
The driven element resonance must be lower than the operating frequency
The driven element radiation resistance must be higher than the characteristic impedance of the transmission line
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
E9G08: What is the process of normalization with regard to a Smith chart?
Reassigning resistance values with regard to the reactance axis
Reassigning reactance values with regard to the resistance axis
Reassigning impedance values with regard to the prime center
Reassigning prime center with regard to the reactance axis
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
