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

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

E1B08: What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receiver(s) involved are of good engineering design?

The amateur station must cease operation

The amateur station must cease operation on all frequencies below 30 MHz

The amateur station must cease operation on all frequencies above 30 MHz

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

Repeater and auxiliary stations may not be remotely controlled

E1D10: Which amateur stations are eligible to be telecommand stations?

Any amateur station designated by NASA

Any amateur station so designated by the ITU

All of these choices are correct

E1E05: What is the minimum passing score on amateur operator license examinations?

Minimum passing score of 70%

Minimum passing score of 80%

Minimum passing score of 77%

E1F05: Amateur stations may not transmit in which of the following frequency segments if they are located in the contiguous 48 states and north of Line A?

440 - 450 MHz

53 - 54 MHz

222 - 223 MHz

E2A03: What is the orbital period of an Earth satellite?

The point of maximum height of a satellite's orbit

The point of minimum height of a satellite's orbit

The time it takes for a satellite to travel from perigee to apogee

E2B09: What hardware, other than a receiver with SSB capability and a suitable computer, is needed to decode SSTV using Digital Radio Mondiale (DRM)?

A special IF converter

A special front end limiter

A special notch filter to remove synchronization pulses

E2C01: Which of the following is true about contest operating?

Interference to other amateurs is unavoidable and therefore acceptable

It is mandatory to transmit the call sign of the station being worked as part of every transmission to that station

Every contest requires a signal report in the exchange

E2D06: Which of the following is a commonly used 2-meter APRS frequency?

144.20 MHz

145.02 MHz

146.52 MHz

E2E05: How does ARQ accomplish error correction?

Special binary codes provide automatic correction

Special polynomial codes provide automatic correction

If errors are detected, redundant data is substituted

E3A06: What frequency range would you normally tune to find EME signals in the 2 meter band?

144.000 - 144.001 MHz

144.100 - 144.300 MHz

145.000 - 145.100 MHz

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

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

South

East

West

E4A06: Which of the following could be determined with a spectrum analyzer?

The degree of isolation between the input and output ports of a 2 meter duplexer

Whether a crystal is operating on its fundamental or overtone frequency

The spectral output of a transmitter

E4B05: If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

146.52 Hz

10 Hz

146.52 kHz

E4C15: What is the primary source of noise that can be heard from an HF receiver with an antenna connected?

Detector noise

Induction motor noise

Receiver front-end noise

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

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 observing the AC power line voltage with a spectrum analyzer

E5A14: What is the resonant frequency of a series RLC circuit if R is 22 ohms, L is 50 microhenrys and C is 40 picofarads?

44.72 MHz

22.36 MHz

1.78 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

E5C01: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance inductor in series with a 100-ohm resistor?

121 ohms at an angle of 35 degrees

161 ohms at an angle of 55 degrees

181 ohms at an angle of 65 degrees

E5D04: What unit measures electrical energy stored in an electrostatic field?

Coulomb

Watt

Volt

E6A07: In Figure E6-1, what is the schematic symbol for a PNP transistor?

2

4

5

E6B09: What is a common use for point contact diodes?

As a constant current source

As a constant voltage source

As a high voltage rectifier

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

E6E08: How is power-supply voltage normally furnished to the most common type of monolithic microwave integrated circuit (MMIC)?

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

E6F09: What is the efficiency of a photovoltaic cell?

The output RF power divided by the input dc power

The effective payback period

The open-circuit voltage divided by the short-circuit current under full illumination

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 table of logic symbols that indicates the low logic states of an op-amp

E7B18: Which of the following is a characteristic of a grounded-grid amplifier?

High power gain

High filament voltage

Low bandwidth

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

E7D10: What is the purpose of C3 in the circuit shown in Figure E7-3?

It provides brute force filtering of the output

It provides fixed bias for Q1

It clips the peaks of the ripple

E7E06: Why is de-emphasis commonly used in FM communications receivers?

To reduce impulse noise reception

For higher efficiency

To remove third-order distortion products

E7F01: What is the purpose of a prescaler circuit?

It converts the output of a JK flip flop to that of an RS flip-flop

It multiplies a higher frequency signal so a low-frequency counter can display the operating frequency

It prevents oscillation in a low-frequency counter circuit

E7G06: Which of the following is the most appropriate use of an op-amp active filter?

As a high-pass filter used to block RFI at the input to receivers

As a low-pass filter used between a transmitter and a transmission line

For smoothing power-supply output

E7H15: Which of these functions can be performed by a phase-locked loop?

Wide-band AF and RF power amplification

Comparison of two digital input signals, digital pulse counter

Photovoltaic conversion, optical coupling

E8A04: What is equivalent to the root-mean-square value of an AC voltage?

The AC voltage found by taking the square of the average value of the peak AC voltage

The DC voltage causing the same amount of heating in a given resistor as the corresponding peak AC voltage

The AC voltage found by taking the square root of the average AC value

E8B02: How does the modulation index of a phase-modulated emission vary with RF carrier frequency (the modulated frequency)?

It increases as the RF carrier frequency increases

It decreases as the RF carrier frequency increases

It varies with the square root of the RF carrier frequency

E8C02: What are some of the differences between the Baudot digital code and ASCII?

Baudot uses four data bits per character, ASCII uses seven or eight; Baudot uses one character as a shift code, ASCII has no shift code

Baudot uses six data bits per character, ASCII uses seven or eight; Baudot has no shift code, ASCII uses two characters as shift codes

Baudot uses seven data bits per character, ASCII uses eight; Baudot has no shift code, ASCII uses two characters as shift codes

E8D14: Which of the following is a typical value for the peak-to-peak voltage at a standard U.S. household electrical outlet?

240 volts

120 volts

170 volts

E9A10: How is antenna efficiency calculated?

(radiation resistance / transmission resistance) x 100%

(total resistance / radiation resistance) x 100%

(effective radiated power / transmitter output) x 100%

E9B09: What type of computer program technique is commonly used for modeling antennas?

Graphical analysis

Mutual impedance analysis

Calculus differentiation with respect to physical properties

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

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 cable with 6 or 7 18-gauge conductors in parallel

A single 12 or 10-gauge stainless steel wire

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

E9F01: What is the velocity factor of a transmission line?

The ratio of the characteristic impedance of the line to the terminating impedance

The index of shielding for coaxial cable

The velocity of the wave in the transmission line multiplied by the velocity of light in a vacuum

E9G11: How are the wavelength scales on a Smith chart calibrated?

In fractions of transmission line electrical frequency

In fractions of antenna electrical wavelength

In fractions of antenna electrical frequency

E9H10: How can the output voltage of a multi-turn receiving loop antenna be increased?

By reducing the permeability of the loop shield

By increasing the number of wire turns in the loop and reducing the area of the loop structure

By winding adjacent turns in opposing directions