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

Polyethylene

Polytetrafluroethylene

Polymorphic silicon

E1A03: With your transceiver displaying the carrier frequency of phone signals, you hear a DX station's CQ on 14.349 MHz USB. Is it legal to return the call using upper sideband on the same frequency?

Yes, because the DX station initiated the contact

Yes, because the displayed frequency is within the 20 meter band

No, USA stations are not permitted to use phone emissions above 14.340 MHz

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

E1C02: What is meant by automatic control of a station?

A station operating with its output power controlled automatically

Remotely controlling a station's antenna pattern through a directional control link

The use of a control link between a control point and a locally controlled station

E1D04: What is an Earth station in the amateur satellite service?

An amateur station that is not able to communicate using amateur satellites

An amateur station that transmits telemetry consisting of measurement of upper atmosphere data from space

Any amateur station on the surface of the Earth

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

The person who has entered into an agreement with the FCC to be the VE session manager

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

E2A05: What do the letters in a satellite's mode designator specify?

Power limits for uplink and downlink transmissions

The location of the ground control station

The polarization of uplink and downlink signals

E2B14: What aspect of an amateur slow-scan television signal encodes the brightness of the picture?

Tone amplitude

Sync amplitude

Sync frequency

E2C02: Which of the following best describes the term "self-spotting" in regards to contest operating?

The acceptable practice of manually posting the call signs of stations on a call sign spotting network

A manual technique for rapidly zero beating or tuning to a station's frequency before calling that station

An automatic method for rapidly zero beating or tuning to a station's frequency before calling that station

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

144.20 MHz

145.02 MHz

146.52 MHz

E2E10: Which of these digital communications modes has the narrowest bandwidth?

MFSK16

170-Hz shift, 45 baud RTTY

300-baud packet

E3A02: What characterizes libration fading of an Earth-Moon-Earth signal?

A slow change in the pitch of the CW signal

A gradual loss of signal as the Sun rises

The returning echo is several Hertz lower in frequency than the transmitted signal

E3B02: What is the approximate maximum range for signals using transequatorial propagation?

1000 miles

2500 miles

7500 miles

E3C09: Which of the following is usually responsible for causing VHF signals to propagate for hundreds of miles?

D-region absorption

Faraday rotation

Ground wave

E4A01: How does a spectrum analyzer differ from an oscilloscope?

A spectrum analyzer measures ionospheric reflection; an oscilloscope displays electrical signals

A spectrum analyzer displays the peak amplitude of signals; an oscilloscope displays the average amplitude of signals

A spectrum analyzer displays radio frequencies; an oscilloscope displays audio frequencies

E4B08: Which of the following is a characteristic of a good DC voltmeter?

High reluctance input

Low reluctance input

Low impedance input

E4C05: What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?

The minimum detectable signal as a function of receive frequency

The noise figure of a 1 Hz bandwidth receiver

The galactic noise contribution to minimum detectable signal

E4D03: How can intermodulation interference between two repeaters occur?

When the repeaters are in close proximity and the signals cause feedback in the final amplifier of one or both transmitters

When the signals from the transmitters are reflected out of phase from airplanes passing overhead

When the signals from the transmitters are reflected in phase from airplanes passing overhead

E4E10: What is a common characteristic of interference caused by a touch controlled electrical device?

The interfering signal sounds like AC hum on an AM receiver or a carrier modulated by 60 Hz hum on a SSB or CW receiver

The interfering signal may drift slowly across the HF spectrum

The interfering signal can be several kHz in width and usually repeats at regular intervals across a HF band

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

11.18 MHz

22.36 MHz

E5B11: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 25 ohms, R is 100 ohms, and XL is 50 ohms?

14 degrees with the voltage lagging the current

76 degrees with the voltage lagging the current

76 degrees with the voltage leading the current

E5C09: When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?

Reactive component

The sum of the reactive and resistive components

The difference between the resistive and reactive components

E5D15: What is the power factor of an RL circuit having a 45 degree phase angle between the voltage and the current?

0.866

1.0

0.5

E6A10: In Figure E6-2, what is the schematic symbol for an N-channel dual-gate MOSFET?

2

5

6

E6B06: Which of the following is a common use of a hot-carrier diode?

As balanced mixers in FM generation

As a variable capacitance in an automatic frequency control circuit

As a constant voltage reference in a power supply

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

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

E6F01: What is photoconductivity?

The conversion of photon energy to electromotive energy

The conversion of electromotive energy to photon energy

The decreased conductivity of an illuminated semiconductor

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

E7B13: In Figure E7-2, what is the purpose of R?

Fixed bias

Collector load

Voltage regulation

E7C02: A T-network with series capacitors and a parallel shunt inductor has which of the following properties?

It is a low-pass filter

It is a band-pass filter

It is a notch filter

E7D02: What is one characteristic of a switching electronic voltage regulator?

The resistance of a control element is varied in direct proportion to the line voltage or load current

It is generally less efficient than a linear regulator

It gives a ramp voltage at its output

E7E14: What is meant by direct conversion when referring to a software defined receiver?

Software is converted from source code to object code during operation of the receiver

Incoming RF is converted to the IF frequency by rectification to generate the control voltage for a voltage controlled oscillator

Software is generated in machine language, avoiding the need for compilers

E7F08: Which of the following is performed by a frequency counter?

Determining the frequency deviation with an FM discriminator

Mixing the incoming signal with a WWV reference

Converting the phase of the measured signal to a voltage which is proportional to the frequency

E7G13: What is meant by the term op-amp input-offset voltage?

The output voltage of the op-amp minus its input voltage

The differential input voltage needed to bring the open-loop output voltage to zero

The potential between the amplifier input terminals of the op-amp in an open-loop condition

E7H18: What are the major spectral impurity components of phase-locked loop synthesizers?

Digital conversion noise

Spurious signals at discrete frequencies

Nyquist limit noise

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

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

E8C11: What spread-spectrum communications technique uses a high speed binary bit stream to shift the phase of an RF carrier?

Frequency hopping

Binary phase-shift keying

Phase compandored spread-spectrum

E8D08: Which of the following best describes electromagnetic waves traveling in free space?

Electric and magnetic fields become aligned as they travel

The energy propagates through a medium with a high refractive index

The waves are reflected by the ionosphere and return to their source

E9A08: What is meant by antenna gain?

The ratio of the signal in the forward direction to that in the opposite direction

The ratio of the amount of power radiated by an antenna compared to the transmitter output power

The final amplifier gain minus the transmission-line losses, including any phasing lines present

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

E9C09: What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

15 dB

3 dB

24 dB

E9D04: Why is it desirable for a ground-mounted satellite communications antenna system to be able to move in both azimuth and elevation?

So the antenna can be pointed away from interfering signals

So the antenna can be positioned to cancel the effects of Faraday rotation

To rotate antenna polarization to match that of the satellite

E9E01: What system matches a high-impedance transmission line to a lower impedance antenna by connecting the line to the driven element in two places spaced a fraction of a wavelength each side of element center?

The gamma matching system

The omega matching system

The stub matching system

E9F11: What impedance does a 1/8-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

An inductive reactance

The same as the input impedance of the final generator stage

E9G06: On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

Prime axis

Impedance axis

Polar axis

E9H08: What is the function of a sense antenna?

It increases the sensitivity of a DF antenna array

It allows DF antennas to receive signals at different vertical angles

It provides diversity reception that cancels multipath signals