E0A09: Which insulating material commonly used as a thermal conductor for some types of electronic devices is extremely toxic if broken or crushed and the particles are accidentally inhaled?

Mica

Zinc oxide

Uranium Hexaflouride

E1A11: What authorization or licensing is required when operating an amateur station aboard a US-registered vessel in international waters?

Any amateur license with an FCC Marine or Aircraft endorsement

Only General class or higher amateur licenses

An unrestricted Radiotelephone Operator Permit

E1B05: What is the maximum bandwidth for a data emission on 60 meters?

60 Hz

170 Hz

1.5 kHz

E1C08: What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?

30 seconds

5 minutes

10 minutes

E1D05: What class of licensee is authorized to be the control operator of a space station?

All except Technician Class

Only General, Advanced or Amateur Extra Class

Only Amateur Extra Class

E1E01: What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?

5

2

4

E1F04: Which of the following geographic descriptions approximately describes "Line A"?

A line roughly parallel to and west of the US Atlantic coastline

A line roughly parallel to and north of the US-Mexican border and Gulf coastline

A line roughly parallel to and east of the US Pacific coastline

E2A06: On what band would a satellite receive signals if it were operating in mode U/V?

144-146 MHz

50.0-50.2 MHz

29.5 to 29.7 MHz

E2B06: What is vestigial sideband modulation?

A type of modulation in which one sideband is inverted

Narrow-band FM transmission achieved by filtering one sideband from the audio before frequency modulating the carrier

Spread spectrum modulation achieved by applying FM modulation following single sideband amplitude modulation

E2C12: What might help to restore contact when DX signals become too weak to copy across an entire HF band a few hours after sunset?

Switch to a higher frequency HF band

Wait 90 minutes or so for the signal degradation to pass

Wait 24 hours before attempting another communication on the band

E2D08: Which of the following types of packet frames is used to transmit APRS beacon data?

Disconnect

Acknowledgement

Connect

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 varying the frequency shift of the transmitted signal according to a predefined algorithm

E3A08: When a meteor strikes the Earth's atmosphere, a cylindrical region of free electrons is formed at what layer of the ionosphere?

The F1 layer

The F2 layer

The D layer

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

E3C05: Which of the following describes selective fading?

Variability of signal strength with beam heading

Sideband inversion within the ionosphere

Degradation of signal strength due to backscatter

E4A04: Which of the following test instruments is used to display spurious signals from a radio transmitter?

A wattmeter

A logic analyzer

A time-domain reflectometer

E4B04: If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

0.1 MHz

1.4652 Hz

1.4652 kHz

E4C09: Which of the following choices is a good reason for selecting a high frequency for the design of the IF in a conventional HF or VHF communications receiver?

Fewer components in the receiver

Reduced drift

Improved receiver noise figure

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

E4E01: Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?

Broadband white noise

Heterodyne interference

All of these choices are correct

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 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?

Current leads voltage by 90 degrees

Voltage and current are 180 degrees out of phase

Voltage and current are in phase

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

E5D08: What type of energy is stored in an electromagnetic or electrostatic field?

Electromechanical energy

Thermodynamic energy

Kinetic energy

E6A06: What is the beta of a bipolar junction transistor?

The frequency at which the current gain is reduced to 1

The breakdown voltage of the base to collector junction

The switching speed of the transistor

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

E6C12: What is BiCMOS logic?

A logic device with two CMOS circuits per package

An FET logic family based on bimetallic semiconductors

A logic family based on bismuth CMOS devices

E6D09: What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of transistorized HF amplifiers?

Electrolytic capacitors

Butterworth filters

Steel-core toroids

E6E07: Which of the following techniques is typically used to construct a MMIC-based microwave amplifier?

Ground-plane construction

Point-to-point construction

Wave-soldering construction

E6F11: Which of the following is the approximate open-circuit voltage produced by a fully-illuminated silicon photovoltaic cell?

0.1 V

1.5 V

12 V

E7A09: D. It produces a logic "1" at its output if any single input is a logic "1"?

It produces a logic "0" at its output only if all inputs are logic "0"

It produces a logic "1" at its output only if all inputs are logic "1"

E7B21: Which of the following devices is generally best suited for UHF or microwave power amplifier applications?

Nuvistor

Silicon controlled rectifier

Triac

E7C12: Which of the following describes a Pi-L network used for matching a vacuum-tube final amplifier to a 50-ohm unbalanced output?

A Phase Inverter Load network

A network with only three discrete parts

A matching network in which all components are isolated from ground

E7D01: What is one characteristic of a linear electronic voltage regulator?

It has a ramp voltage as its output

It eliminates the need for a pass transistor

The control element duty cycle is proportional to the line or load conditions

E7E12: What is a frequency discriminator stage in a FM receiver?

An FM generator circuit

A circuit for filtering two closely adjacent signals

An automatic band-switching circuit

E7F10: What alternate method of determining frequency, other than by directly counting input pulses, is used by some counters?

GPS averaging

Prescaling

D/A conversion

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 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

E7H03: How is positive feedback supplied in a Hartley oscillator?

Through a capacitive divider

Through link coupling

Through a neutralizing capacitor

E8A14: Which of these methods is commonly used to convert analog signals to digital signals?

Harmonic regeneration

Level shifting

Phase reversal

E8B04: What is the modulation index of an FM-phone signal having a maximum carrier deviation of plus or minus 6 kHz when modulated with a 2-kHz modulating frequency?

6000

2000

1/3

E8C05: What is the necessary bandwidth of a 13-WPM international Morse code transmission?

Approximately 13 Hz

Approximately 26 Hz

Approximately 104 Hz

E8D05: If an RMS-reading AC voltmeter reads 65 volts on a sinusoidal waveform, what is the peak-to-peak voltage?

46 volts

92 volts

130 volts

E9A07: What is a folded dipole antenna?

A dipole one-quarter wavelength long

A type of ground-plane antenna

A dipole configured to provide forward gain

E9B03: In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?

12 dB

18 dB

24 dB

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

E9D03: How does the beamwidth of an antenna vary as the gain is increased?

It increases geometrically

It increases arithmetically

It is essentially unaffected

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 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

E9F03: Why is the physical length of a coaxial cable transmission line shorter than its electrical length?

Skin effect is less pronounced in the coaxial cable

The characteristic impedance is higher in a parallel feed line

The surge impedance is higher in a parallel feed line

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

Voltage circles and current arcs

Voltage lines and current chords

Resistance lines and reactance chords

E9H02: What is the effective radiated power relative to a dipole of a repeater station with 200 watts transmitter power output, 4-dB feed line loss, 3.2-dB duplexer loss, 0.8-dB circulator loss and 10-dBd antenna gain?

2000 watts

126 watts

300 watts