Ham Extra License Practice Quiz


• Percentage: 0%; Correct: 0; Total: 0 of 50

E0A10: What material found in some electronic components such as high-voltage capacitors and transformers is considered toxic?

Polychlorinated biphenyls
Polyethylene
Polytetrafluroethylene
Polymorphic silicon

E1A02: When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?

The exact lower band edge
300 Hz above the lower band edge
1 kHz above the lower band edge
3 kHz above the lower band edge

E1B03: Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

1 mile
3 miles
10 miles
30 miles

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

E1D02: What is the amateur satellite service?

A radio navigation service using satellites for the purpose of self training, intercommunication and technical studies carried out by amateurs
A spacecraft launching service for amateur-built satellites
A radio communications service using amateur radio stations on satellites
A radio communications service using stations on Earth satellites for public service broadcast

E1E08: To which of the following examinees may a VE not administer an examination?

Employees of the VE
Friends of the VE
Relatives of the VE as listed in the FCC rules
All of these choices are correct

E1F02: Which of the following operating arrangements allows an FCC-licensed US citizen to operate in many European countries, and alien amateurs from many European countries to operate in the US?

CEPT agreement
IARP agreement
ITU reciprocal license
All of these choices are correct

E2A08: Why should effective radiated power to a satellite which uses a linear transponder be limited?

To prevent creating errors in the satellite telemetry
To avoid reducing the downlink power to all other users
To prevent the satellite from emitting out of band signals
To avoid interfering with terrestrial QSOs

E2B12: How are analog SSTV images typically transmitted on the HF bands?

Video is converted to equivalent Baudot representation
Video is converted to equivalent ASCII representation
Varying tone frequencies representing the video are transmitted using PSK
Varying tone frequencies representing the video are transmitted using single sideband

E2C03: From which of the following bands is amateur radio contesting generally excluded?

30 meters
6 meters
2 meters
33 cm

E2D04: What is the purpose of digital store-and-forward functions on an Amateur Radio satellite?

To upload operational software for the transponder
To delay download of telemetry between satellites
To store digital messages in the satellite for later download by other stations
To relay messages between satellites

E2E11: What is the difference between direct FSK and audio FSK?

Direct FSK applies the data signal to the transmitter VFO
Audio FSK has a superior frequency response
Direct FSK uses a DC-coupled data connection
Audio FSK can be performed anywhere in the transmit chain

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

E3B01: What is transequatorial propagation?

Propagation between two mid-latitude points at approximately the same distance north and south of the magnetic equator
Propagation between any two points located on the magnetic equator
Propagation between two continents by way of ducts along the magnetic equator
Propagation between two stations at the same latitude

E3C11: From the contiguous 48 states, in which approximate direction should an antenna be pointed to take maximum advantage of aurora propagation?

South
North
East
West

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

E4B06: How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?

100 watts
125 watts
25 watts
75 watts

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

E4D10: What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

Signals less than 40 dBm will not generate audible third-order intermodulation products
The receiver can tolerate signals up to 40 dB above the noise floor without producing third-order intermodulation products
A pair of 40 dBm signals will theoretically generate a third-order intermodulation product with the same level as the input signals
A pair of 1 mW input signals will produce a third-order intermodulation product which is 40 dB stronger than the input signal

E4E08: What type of signal is picked up by electrical wiring near a radio antenna?

A common-mode signal at the frequency of the radio transmitter
An electrical-sparking signal
A differential-mode signal at the AC power line frequency
Harmonics of the AC power line frequency

E5A12: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?

436.6 kHz
218.3 kHz
31.4 kHz
15.7 kHz

E5B06: How long does it take for an initial charge of 800 V DC to decrease to 294 V DC in a 450-microfarad capacitor when a 1-megohm resistor is connected across it?

4.50 seconds
9 seconds
450 seconds
900 seconds

E5C16: In polar coordinates, what is the impedance of a circuit that has an admittance of 7.09 millisiemens at 45 degrees?

5.03 E-06 ohms at an angle of 45 degrees
141 ohms at an angle of -45 degrees
19,900 ohms at an angle of -45 degrees
141 ohms at an angle of 45 degrees

E5D01: What is the result of skin effect?

As frequency increases, RF current flows in a thinner layer of the conductor, closer to the surface
As frequency decreases, RF current flows in a thinner layer of the conductor, closer to the surface
Thermal effects on the surface of the conductor increase the impedance
Thermal effects on the surface of the conductor decrease the impedance

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

E6B02: What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?

Much higher reverse voltage breakdown
Controlled reverse avalanche voltage
Enhanced carrier retention time
Less forward voltage drop

E6C11: In Figure E6-5, what is the schematic symbol for the NOT operation (inverter)?

2
4
5
6

E6D06: What core material property determines the inductance of a toroidal inductor?

Thermal impedance
Resistance
Reactivity
Permeability

E6E05: Which of the following noise figure values is typical of a low-noise UHF preamplifier?

2 dB
-10 dB
44 dBm
-20 dBm

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

E7A15: What is a D flip-flop?

A flip-flop whose output takes on the state of the D input when the clock signal transitions from low to high
A differential class D amplifier used as a flip-flop circuit
A dynamic memory storage element
A flip-flop whose output is capable of both positive and negative voltage excursions

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

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

E7D09: What is the purpose of C1 in the circuit shown in Figure E7-3?

It resonates at the ripple frequency
It provides fixed bias for Q1
It decouples the output
It filters the supply voltage

E7E05: What circuit is added to an FM transmitter to boost the higher audio frequencies?

A de-emphasis network
A heterodyne suppressor
An audio prescaler
A pre-emphasis network

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

E7G10: What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 1800 ohms and RF is 68 kilohms?

1
0.03
38
76

E7H14: What is a phase-locked loop circuit?

An electronic servo loop consisting of a ratio detector, reactance modulator, and voltage-controlled oscillator
An electronic circuit also known as a monostable multivibrator
An electronic servo loop consisting of a phase detector, a low-pass filter, a voltage-controlled oscillator, and a stable reference oscillator
An electronic circuit consisting of a precision push-pull amplifier with a differential input

E8A06: What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?

2.5 to 1
25 to 1
1 to 1
100 to 1

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

E8C13: What is one advantage of using JT-65 coding?

Uses only a 65 Hz bandwidth
The ability to decode signals which have a very low signal to noise ratio
Easily copied by ear if necessary
Permits fast-scan TV transmissions over narrow bandwidth

E8D15: Which of the following is a typical value for the RMS voltage at a standard U.S. household electrical power outlet?

120V AC
340V AC
85V AC
170V AC

E9A06: What is included in the total resistance of an antenna system?

Radiation resistance plus space impedance
Radiation resistance plus transmission resistance
Transmission-line resistance plus radiation resistance
Radiation resistance plus ohmic resistance

E9B13: What does the abbreviation NEC stand for when applied to antenna modeling programs?

Next Element Comparison
Numerical Electromagnetics Code
National Electrical Code
Numeric Electrical Computation

E9C12: When constructing a Beverage antenna, which of the following factors should be included in the design to achieve good performance at the desired frequency?

Its overall length must not exceed 1/4 wavelength
It must be mounted more than 1 wavelength above ground
It should be configured as a four-sided loop
It should be one or more wavelengths long

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

E9E11: What is an effective way of matching a feed line to a VHF or UHF antenna when the impedances of both the antenna and feed line are unknown?

Use a 50-ohm 1:1 balun between the antenna and feed line
Use the "universal stub" matching technique
Connect a series-resonant LC network across the antenna feed terminals
Connect a parallel-resonant LC network across the antenna feed terminals

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

E9G02: What type of coordinate system is used in a Smith chart?

Voltage circles and current arcs
Resistance circles and reactance arcs
Voltage lines and current chords
Resistance lines and reactance chords

E9H03: What is the effective isotropic radiated power of a repeater station with 200 watts transmitter power output, 2-dB feed line loss, 2.8-dB duplexer loss, 1.2-dB circulator loss and 7-dBi antenna gain?

159 watts
252 watts
632 watts
63.2 watts