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
E1A08: If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?
The control operator of the packet bulletin board station
The control operator of the originating station
The control operators of all the stations in the system
The control operators of all the stations in the system not authenticating the source from which they accept communications
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
E1C06: Which of the following statements concerning remotely controlled amateur stations is true?
Only Extra Class operators may be the control operator of a remote station
A control operator need not be present at the control point
A control operator must be present at the control point
Repeater and auxiliary stations may not be remotely controlled
E1D06: Which of the following special provisions must a space station incorporate in order to comply with space station requirements?
The space station must be capable of terminating transmissions by telecommand when directed by the FCC
The space station must cease all transmissions after 5 years
The space station must be capable of changing its orbit whenever such a change is ordered by NASA
All of these choices are correct
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
E1F06: What is the National Radio Quiet Zone?
An area in Puerto Rico surrounding the Aricebo Radio Telescope
An area in New Mexico surrounding the White Sands Test Area
An area surrounding the National Radio Astronomy Observatory
An area in Florida surrounding Cape Canaveral
E2A11: What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?
A linearly polarized antenna
A circularly polarized antenna
An isotropic antenna
A log-periodic dipole array
E2B15: What signals SSTV receiving equipment to begin a new picture line?
Specific tone frequencies
Elapsed time
Specific tone amplitudes
A two-tone signal
E2C05: What is the function of a DX QSL Manager?
To allocate frequencies for DXpeditions
To handle the receiving and sending of confirmation cards for a DX station
To run a net to allow many stations to contact a rare DX station
To relay calls to and from a DX station
E2D11: Which of the following data are used by the APRS network to communicate your location?
Polar coordinates
Time and frequency
Radio direction finding LOPs
Latitude and longitude
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
E3B04: What type of propagation is probably occurring if an HF beam antenna must be pointed in a direction 180 degrees away from a station to receive the strongest signals?
Long-path
Sporadic-E
Transequatorial
Auroral
E3C13: What type of polarization is best for ground-wave propagation?
Vertical
Horizontal
Circular
Elliptical
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
E4C12: What is an undesirable effect of using too wide a filter bandwidth in the IF section of a receiver?
Output-offset overshoot
Filter ringing
Thermal-noise distortion
Undesired signals may be heard
E4D11: Why are third-order intermodulation products created within a receiver of particular interest compared to other products?
The third-order product of two signals which are in the band of interest is also likely to be within the band
The third-order intercept is much higher than other orders
Third-order products are an indication of poor image rejection
Third-order intermodulation produces three products for every input signal within the band of interest
E4E07: How can you determine if line noise interference is being generated within your home?
By checking the power line voltage with a time domain reflectometer
By observing the AC power line waveform with an oscilloscope
By turning off the AC power line main circuit breaker and listening on a battery operated radio
By observing the AC power line voltage with a spectrum analyzer
E5A06: What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?
It is at a minimum
It is at a maximum
It equals 1 divided by the quantity 2 times Pi, multiplied by the square root of inductance L multiplied by capacitance C
It equals 2 multiplied by Pi, multiplied by frequency "F", multiplied by inductance "L"
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
E5C14: What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive and/or capacitive reactance?
Maidenhead grid
Faraday grid
Elliptical coordinates
Polar coordinates
E5D04: What unit measures electrical energy stored in an electrostatic field?
Coulomb
Joule
Watt
Volt
E6A01: In what application is gallium arsenide used as a semiconductor material in preference to germanium or silicon?
In high-current rectifier circuits
In high-power audio circuits
At microwave frequencies
At very low frequency RF circuits
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
E6C05: Which of the following is an advantage of CMOS logic devices over TTL devices?
Differential output capability
Lower distortion
Immune to damage from static discharge
Lower power consumption
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
E6E08: How is power-supply voltage normally furnished to the most common type of monolithic microwave integrated circuit (MMIC)?
Through a resistor and/or RF choke connected to the amplifier output lead
MMICs require no operating bias
Through a capacitor and RF choke connected to the amplifier input lead
Directly to the bias-voltage (VCC IN) lead
E6F05: Which of the following describes an optical shaft encoder?
A device which detects rotation of a control by interrupting a light source with a patterned wheel
A device which measures the strength a beam of light using analog to digital conversion
A digital encryption device often used to encrypt spacecraft control signals
A device for generating RTTY signals by means of a rotating light source.
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"
E7B01: For what portion of a signal cycle does a Class AB amplifier operate?
More than 180 degrees but less than 360 degrees
Exactly 180 degrees
The entire cycle
Less than 180 degrees
E7C04: How does an impedance-matching circuit transform a complex impedance to a resistive impedance?
It introduces negative resistance to cancel the resistive part of impedance
It introduces transconductance to cancel the reactive part of impedance
It cancels the reactive part of the impedance and changes the resistive part to a desired value
Network resistances are substituted for load resistances and reactances are matched to the resistances
E7D08: What type of circuit is shown in Figure E7-3?
Switching voltage regulator
Grounded emitter amplifier
Linear voltage regulator
Emitter follower
E7E14: What is meant by direct conversion when referring to a software defined receiver?
Software is converted from source code to object code during operation of the receiver
Incoming RF is converted to the IF frequency by rectification to generate the control voltage for a voltage controlled oscillator
Incoming RF is mixed to "baseband" for analog-to-digital conversion and subsequent processing
Software is generated in machine language, avoiding the need for compilers
E7F03: What is the function of a decade counter digital IC?
It produces one output pulse for every ten input pulses
It decodes a decimal number for display on a seven-segment LED display
It produces ten output pulses for every input pulse
It adds two decimal numbers together
E7G03: Which of the following is an advantage of using an op-amp instead of LC elements in an audio filter?
Op-amps are more rugged
Op-amps are fixed at one frequency
Op-amps are available in more varieties than are LC elements
Op-amps exhibit gain rather than insertion loss
E7H08: What is a Gunn diode oscillator?
An oscillator based on the negative resistance properties of properly-doped semiconductors
An oscillator based on the argon gas diode
A highly stable reference oscillator based on the tee-notch principle
A highly stable reference oscillator based on the hot-carrier effect
E8A03: What type of wave is made up of sine waves of a given fundamental frequency plus all its harmonics?
A sawtooth wave
A square wave
A sine wave
A cosine wave
E8B05: What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?
60
0.167
0.6
1.67
E8C10: What spread-spectrum communications technique alters the center frequency of a conventional carrier many times per second in accordance with a pseudo-random list of channels?
Frequency hopping
Direct sequence
Time-domain frequency modulation
Frequency compandored spread-spectrum
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
E9A11: Which of the following choices is a way to improve the efficiency of a ground-mounted quarter-wave vertical antenna?
Install a good radial system
Isolate the coax shield from ground
Shorten the radiating element
Reduce the diameter of the radiating element
E9B04: What may occur when a directional antenna is operated at different frequencies within the band for which it was designed?
Feed point impedance may become negative
The E-field and H-field patterns may reverse
Element spacing limits could be exceeded
The gain may change depending on frequency
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
E9D08: What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?
It is increased
It is decreased
No change occurs
It becomes flat
E9E04: What is the purpose of the series capacitor in a gamma-type antenna matching network?
To provide DC isolation between the feed line and the antenna
To cancel the inductive reactance of the matching network
To provide a rejection notch to prevent the radiation of harmonics
To transform the antenna impedance to a higher value
E9F02: Which of the following determines the velocity factor of a transmission line?
The termination impedance
The line length
Dielectric materials used in the line
The center conductor resistivity
E9G01: Which of the following can be calculated using a Smith chart?
Impedance along transmission lines
Radiation resistance
Antenna radiation pattern
Radio propagation
E9H07: Why is it advisable to use an RF attenuator on a receiver being used for direction finding?
It narrows the bandwidth of the received signal to improve signal to noise ratio
It compensates for the effects of an isotropic antenna, thereby improving directivity
It reduces loss of received signals caused by antenna pattern nulls, thereby increasing sensitivity
It prevents receiver overload which could make it difficult to determine peaks or nulls
