Ham Extra License Practice Quiz

• Percentage: 0%; Correct: 0; Total: 0 of 50
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
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
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
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
E1D10: Which amateur stations are eligible to be telecommand stations?

Any amateur station designated by NASA
Any amateur station so designated by the space station licensee, subject to the privileges of the class of operator license held by the control operator
Any amateur station so designated by the ITU
All of these choices are correct
E1E03: What is a Volunteer Examiner Coordinator?

A person who has volunteered to administer amateur operator license examinations
A person who has volunteered to prepare amateur operator license examinations
An organization that has entered into an agreement with the FCC to coordinate amateur operator license examinations
The person who has entered into an agreement with the FCC to be the VE session manager
E1F08: Which of the following types of amateur station communications are prohibited?

Communications transmitted for hire or material compensation, except as otherwise provided in the rules
Communications that have a political content, except as allowed by the Fairness Doctrine
Communications that have a religious content
Communications in a language other than English
E2A10: Why may the received signal from an amateur satellite exhibit a rapidly repeating fading effect?

Because the satellite is spinning
Because of ionospheric absorption
Because of the satellite's low orbital altitude
Because of the Doppler Effect
E2B14: What aspect of an amateur slow-scan television signal encodes the brightness of the picture?

Tone frequency
Tone amplitude
Sync amplitude
Sync frequency
E2C08: Why are received spread-spectrum signals resistant to interference?

Signals not using the spectrum-spreading algorithm are suppressed in the receiver
The high power used by a spread-spectrum transmitter keeps its signal from being easily overpowered
The receiver is always equipped with a digital blanker circuit
If interference is detected by the receiver it will signal the transmitter to change frequencies
E2D09: Under clear communications conditions, which of these digital communications modes has the fastest data throughput?

AMTOR
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
E2E08: Which of the following HF digital modes can be used to transfer binary files?

Hellschreiber
PACTOR
RTTY
AMTOR
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
E3B11: Which of the following describes gray-line propagation?

Backscatter contacts on the 10 meter band
Over the horizon propagation on the 6 and 2 meter bands
Long distance communications at twilight on frequencies less than 15 MHz
Tropospheric propagation on the 2 meter and 70 centimeter bands
E3C03: Where in the ionosphere does Aurora activity occur?

In the F1-region
In the F2-region
In the D-region
In the E-region
E4A08: Which of the following instruments would be best for measuring the SWR of a beam antenna?

A spectrum analyzer
A Q meter
An ohmmeter
An antenna analyzer
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
E4D06: What is the term for unwanted signals generated by the mixing of two or more signals?

Amplifier desensitization
Neutralization
Adjacent channel interference
Intermodulation interference
E4E01: Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?

Ignition noise
Broadband white noise
Heterodyne interference
All of these choices are correct
E5A15: What is the resonant frequency of a series RLC circuit if R is 56 ohms, L is 40 microhenrys and C is 200 picofarads?

3.76 MHz
1.78 MHz
11.18 MHz
22.36 MHz
E5B09: What is the relationship between the current through a capacitor and the voltage across a capacitor?

Voltage and current are in phase
Voltage and current are 180 degrees out of phase
Voltage leads current by 90 degrees
Current leads voltage by 90 degrees
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
E5D05: Which of the following creates a magnetic field?

Potential differences between two points in space
Electric current
A charged capacitor
A battery
E6A12: Why do many MOSFET devices have internally connected Zener diodes on the gates?

To provide a voltage reference for the correct amount of reverse-bias gate voltage
To protect the substrate from excessive voltages
To keep the gate voltage within specifications and prevent the device from overheating
To reduce the chance of the gate insulation being punctured by static discharges or excessive voltages
E6B12: What is one common use for PIN diodes?

As a constant current source
As a constant voltage source
As an RF switch
As a high voltage rectifier
E6C01: What is the recommended power supply voltage for TTL series integrated circuits?

12 volts
1.5 volts
5 volts
13.6 volts
E6D04: What function does a charge-coupled device (CCD) serve in a modern video camera?

It stores photogenerated charges as signals corresponding to pixels
It generates the horizontal pulses needed for electron beam scanning
It focuses the light used to produce a pattern of electrical charges corresponding to the image
It combines audio and video information to produce a composite RF signal
E6E09: Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?

Provide the crystal with a specified parallel inductance
Provide the crystal with a specified parallel capacitance
Bias the crystal at a specified voltage
Bias the crystal at a specified current
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.
E7A10: What is a truth table?

A table of logic symbols that indicate the high logic states of an op-amp
A diagram showing logic states when the digital device's output is true
A list of inputs and corresponding outputs for a digital device
A table of logic symbols that indicates the low logic states of an op-amp
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
E7C09: What type of digital signal processing filter might be used to generate an SSB signal?

An adaptive filter
A notch filter
A Hilbert-transform filter
An elliptical filter
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
E7E01: Which of the following can be used to generate FM phone emissions?

A balanced modulator on the audio amplifier
A reactance modulator on the oscillator
A reactance modulator on the final amplifier
A balanced modulator on the oscillator
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
E7H09: What type of frequency synthesizer circuit uses a phase accumulator, lookup table, digital to analog converter and a low-pass anti-alias filter?

A direct digital synthesizer
A hybrid synthesizer
A phase locked loop synthesizer
A diode-switching matrix synthesizer
E8A08: What is the period of a wave?

The time required to complete one cycle
The number of degrees in one cycle
The number of zero crossings in one cycle
The amplitude of the wave
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
E8D13: Which of the following is a typical value for the peak voltage at a standard U.S. household electrical outlet?

240 volts
170 volts
120 volts
340 volts
E9A13: How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?

3.85 dB
6.0 dB
8.15 dB
2.79 dB
E9B01: In the antenna radiation pattern shown in Figure E9-1, what is the 3-dB beamwidth?

75 degrees
50 degrees
25 degrees
30 degrees
E9C11: How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus rocky ground?

The low-angle radiation decreases
The high-angle radiation increases
Both the high- and low-angle radiation decrease
The low-angle radiation increases
E9D14: Which of the following types of conductor would be best for minimizing losses in a station's RF ground system?

A resistive wire, such as a spark plug wire
A wide flat copper strap
A cable with 6 or 7 18-gauge conductors in parallel
A single 12 or 10-gauge stainless steel wire
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
E9F06: What is the approximate physical length of an air-insulated, parallel conductor transmission line that is electrically one-half wavelength long at 14.10 MHz?

15 meters
20 meters
10 meters
71 meters
E9G07: On the Smith chart shown in Figure E9-3, what is the only straight line shown?

The reactance axis
The current axis
The voltage axis
The resistance axis
E9H05: What is the main drawback of a wire-loop antenna for direction finding?

It has a bidirectional pattern
It is non-rotatable
It receives equally well in all directions
It is practical for use only on VHF bands