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

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

E1B02: Which of the following factors might cause the physical location of an amateur station apparatus or antenna structure to be restricted?

The location is near an area of political conflict

The location is of geographical or horticultural importance

The location is in an ITU zone designated for coordination with one or more foreign governments

E1C04: When may an automatically controlled station retransmit third party communications?

Never

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 and 33 cm

33 cm and 13 cm

E1E02: Where are the questions for all written US amateur license examinations listed?

In FCC Part 97

In a question pool maintained by the FCC

In the appropriate FCC Report and Order

E1F11: Which of the following best describes one of the standards that must be met by an external RF power amplifier if it is to qualify for a grant of FCC certification?

It must produce full legal output when driven by not more than 5 watts of mean RF input power

It must be capable of external RF switching between its input and output networks

It must exhibit a gain of 0 dB or less over its full output range

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 prevent the satellite from emitting out of band signals

To avoid interfering with terrestrial QSOs

E2B15: What signals SSTV receiving equipment to begin a new picture line?

Elapsed time

Specific tone amplitudes

A two-tone signal

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

6 meters

2 meters

33 cm

E2D07: Which of the following digital protocols is used by APRS?

PACTOR

802.11

AMTOR

E2E08: Which of the following HF digital modes can be used to transfer binary files?

Hellschreiber

RTTY

AMTOR

E3A09: Which of the following frequency ranges is well suited for meteor-scatter communications?

1.8 - 1.9 MHz

10 - 14 MHz

220 - 450 MHz

E3B01: What is transequatorial propagation?

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

E3C04: Which emission mode is best for Aurora propagation?

SSB

FM

RTTY

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

E4B01: Which of the following factors most affects the accuracy of a frequency counter?

Input attenuator accuracy

Decade divider accuracy

Temperature coefficient of the logic

E4C03: What is the term for the blocking of one FM phone signal by another, stronger FM phone signal?

Desensitization

Cross-modulation interference

Frequency discrimination

E4D05: What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?

146.88 MHz and 146.34 MHz

146.10 MHz and 147.30 MHz

173.35 MHz and 139.40 MHz

E4E09: What undesirable effect can occur when using an IF noise blanker?

Received audio in the speech range might have an echo effect

The audio frequency bandwidth of the received signal might be compressed

FM signals can no longer be demodulated

E5A03: What is the magnitude of the impedance of a series RLC circuit at resonance?

High, as compared to the circuit resistance

Approximately equal to capacitive reactance

Approximately equal to inductive reactance

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

900 seconds

E5C18: In polar coordinates, what is the impedance of a series circuit consisting of a resistance of 4 ohms, an inductive reactance of 4 ohms, and a capacitive reactance of 1 ohm?

6.4 ohms at an angle of 53 degrees

5 ohms at an angle of 45 degrees

10 ohms at an angle of -51 degrees

E5D09: What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?

It is dissipated as heat in the circuit

It is dissipated as kinetic energy in the circuit

It is dissipated in the formation of inductive and capacitive fields

E6A05: What is the alpha of a bipolar junction transistor?

The change of collector current with respect to base current

The change of base current with respect to collector current

The change of collector current with respect to gate current

E6B04: What type of semiconductor device is designed for use as a voltage-controlled capacitor?

Tunnel diode

Silicon-controlled rectifier

Zener diode

E6C08: In Figure E6-5, what is the schematic symbol for a NAND gate?

1

3

4

E6D15: What is the principle advantage of liquid-crystal display (LCD) devices over other types of display devices?

They can display changes instantly

They are visible in all light conditions

They can be easily interchanged with other display devices

E6E04: What is the most common input and output impedance of circuits that use MMICs?

300 ohms

450 ohms

10 ohms

E6F10: What is the most common type of photovoltaic cell used for electrical power generation?

Selenium

Cadmium Sulfide

Copper oxide

E7A02: How many output level changes are obtained for every two trigger pulses applied to the input of a T flip-flop circuit?

None

One

Four

E7B12: What type of circuit is shown in Figure E7-1?

Switching voltage regulator

Linear voltage regulator

Emitter follower amplifier

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

Network resistances are substituted for load resistances and reactances are matched to the resistances

E7D12: What is the purpose of R2 in the circuit shown in Figure E7-3?

It provides fixed bias for Q1

It provides fixed bias for D1

It decouples hum from D1

E7E02: What is the function of a reactance modulator?

To produce PM signals by using an electrically variable resistance

To produce AM signals by using an electrically variable inductance or capacitance

To produce AM signals by using an electrically variable resistance

E7F07: What determines the accuracy of a frequency counter?

The speed of the logic devices used

Accuracy of the AC input frequency to the power supply

Proper balancing of the mixer diodes

E7G14: What is the typical input impedance of an integrated circuit op-amp?

100 ohms

1000 ohms

Very low

E7H08: What is a Gunn diode oscillator?

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

E8A13: What is an advantage of using digital signals instead of analog signals to convey the same information?

Less complex circuitry is required for digital signal generation and detection

Digital signals always occupy a narrower bandwidth

All of these choices are correct

E8B06: What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

0.214

0.47

47

E8C03: What is one advantage of using the ASCII code for data communications?

It includes built-in error-correction features

It contains fewer information bits per character than any other code

It uses one character as a shift code to send numeric and special characters

E8D04: What is the PEP output of a transmitter that develops a peak voltage of 30 volts into a 50-ohm load?

4.5 watts

16 watts

18 watts

E9A01: Which of the following describes an isotropic antenna?

A grounded antenna used to measure earth conductivity

A horizontally polarized antenna used to compare Yagi antennas

A spacecraft antenna used to direct signals toward the earth

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

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

Four-sides; an LC network at each corner except for the transmission connection;

Four-sides, each of a different physical length

E9D15: Which of the following would provide the best RF ground for your station?

A 50-ohm resistor connected to ground

An electrically-short connection to a metal water pipe

An electrically-short connection to 3 or 4 interconnected ground rods via a series RF choke

E9E09: Which of these matching systems is an effective method of connecting a 50-ohm coaxial cable feed line to a grounded tower so it can be used as a vertical antenna?

Double-bazooka match

Hairpin match

All of these choices are correct

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

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

E9H12: What is an advantage of using a shielded loop antenna for direction finding?

It automatically cancels ignition noise pickup in mobile installations

It eliminates tracking errors caused by strong out-of-band signals

It allows stations to communicate without giving away their position