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

Polyethylene

Polytetrafluroethylene

Polymorphic silicon

E1A04: With your transceiver displaying the carrier frequency of phone signals, you hear a DX station calling CQ on 3.601 MHz LSB. Is it legal to return the call using lower sideband on the same frequency?

Yes, because the DX station initiated the contact

Yes, because the displayed frequency is within the 75 meter phone band segment

No, USA stations are not permitted to use phone emissions below 3.610 MHz

E1B07: Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?

At the lowest frequency of the channel

At the highest frequency of the channel

On any frequency where the signal's sidebands are within the channel

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

E1D06: Which of the following special provisions must a space station incorporate in order to comply with space station requirements?

The space station must cease all transmissions after 5 years

The space station must be capable of changing its orbit whenever such a change is ordered by NASA

All of these choices are correct

E1E10: What must the administering VEs do after the administration of a successful examination for an amateur operator license?

They must collect and send the documents to the NCVEC for grading

They must collect and submit the documents to the coordinating VEC for grading

They must collect and send the documents to the FCC according to instructions

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?

IARP agreement

ITU reciprocal license

All of these choices are correct

E2A11: What type of antenna can be used to minimize the effects of spin modulation and Faraday rotation?

A linearly polarized antenna

An isotropic antenna

A log-periodic dipole array

E2B01: How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

60

90

120

E2C05: What is the function of a DX QSL Manager?

To allocate frequencies for DXpeditions

To run a net to allow many stations to contact a rare DX station

To relay calls to and from a DX station

E2D03: Which of the following digital modes is especially useful for EME communications?

FSK441

PACTOR III

Olivia

E2E06: What is the most common data rate used for HF packet communications?

48 baud

110 baud

1200 baud

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

E3B09: At what time of day is gray-line propagation most likely to occur?

When the Sun is directly above the location of the transmitting station

When the Sun is directly overhead at the middle of the communications path between the two stations

When the Sun is directly above the location of the receiving station

E3C04: Which emission mode is best for Aurora propagation?

SSB

FM

RTTY

E4A10: Which of the following tests establishes that a silicon NPN junction transistor is biased on?

Measure base-to-emitter resistance with an ohmmeter; it should be approximately

Measure base-to-emitter resistance with an ohmmeter; it should be approximately 0.6 to 0.7 ohms

Measure base-to-emitter voltage with a voltmeter; it should be approximately

E4B13: How is the compensation of an oscilloscope probe typically adjusted?

A high frequency sine wave is displayed and the probe is adjusted for maximum amplitude

A frequency standard is displayed and the probe is adjusted until the deflection time is accurate

A DC voltage standard is displayed and the probe is adjusted until the displayed voltage is accurate

E4C06: A CW receiver with the AGC off has an equivalent input noise power density of -174 dBm/Hz. What would be the level of an unmodulated carrier input to this receiver that would yield an audio output SNR of 0 dB in a 400 Hz noise bandwidth?

174 dBm

-164 dBm

-155 dBm

E4D07: Which of the following describes the most significant effect of an off-frequency signal when it is causing cross-modulation interference to a desired signal?

A large increase in background noise

A reduction in apparent signal strength

The desired signal can no longer be heard

E4E04: How can conducted and radiated noise caused by an automobile alternator be suppressed?

By installing filter capacitors in series with the DC power lead and by installing a blocking capacitor in the field lead

By installing a noise suppression resistor and a blocking capacitor in both leads

By installing a high-pass filter in series with the radio's power lead and a low-pass filter in parallel with the field lead

E5A17: What is the resonant frequency of a parallel RLC circuit if R is 47 ohms, L is 25 microhenrys and C is 10 picofarads?

63.2 MHz

10.1 kHz

63.2 kHz

E5B05: How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?

0.04 seconds

20 seconds

40 seconds

E5C04: In polar coordinates, what is the impedance of a network consisting of a 400-ohm-reactance capacitor in series with a 300-ohm resistor?

240 ohms at an angle of 36.9 degrees

240 ohms at an angle of -36.9 degrees

500 ohms at an angle of 53.1 degrees

E5D18: How many watts are consumed in a circuit having a power factor of 0.71 if the apparent power is 500 VA?

704 W

252 W

1.42 mW

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

E6B05: What characteristic of a PIN diode makes it useful as an RF switch or attenuator?

Extremely high reverse breakdown voltage

Ability to dissipate large amounts of power

Reverse bias controls its forward voltage drop

E6C05: Which of the following is an advantage of CMOS logic devices over TTL devices?

Differential output capability

Lower distortion

Immune to damage from static discharge

E6D03: Which of the following is true of a charge-coupled device (CCD)?

Its phase shift changes rapidly with frequency

It is a CMOS analog-to-digital converter

It is used in a battery charger circuit

E6E02: Which of the following factors has the greatest effect in helping determine the bandwidth and response shape of a crystal ladder filter?

The DC voltage applied to the quartz crystal

The gain of the RF stage preceding the filter

The amplitude of the signals passing through the filter

E6F03: What is the most common configuration of an optoisolator or optocoupler?

A lens and a photomultiplier

A frequency modulated helium-neon laser

An amplitude modulated helium-neon laser

E7A04: How many flip-flops are required to divide a signal frequency by 4?

1

4

8

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

Fixed bias

Collector load

Voltage regulation

E7C06: What are the distinguishing features of an elliptical filter?

Gradual passband rolloff with minimal stop band ripple

Extremely flat response over its pass band with gradually rounded stop band corners

Gradual passband rolloff with extreme stop band ripple

E7D11: What is the purpose of R1 in the circuit shown in Figure E7-3?

It provides a constant load to the voltage source

It couples hum to D1

It bypasses hum around D1

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

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

E7G07: What magnitude of voltage gain can be expected from the circuit in Figure E7-4 when R1 is 10 ohms and RF is 470 ohms?

0.21

94

24

E7H04: How is positive feedback supplied in a Colpitts oscillator?

Through a tapped coil

Through link coupling

Through a neutralizing capacitor

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

E8B12: What is digital time division multiplexing?

Two or more data streams are assigned to discrete sub-carriers on an FM transmitter

Two or more data streams share the same channel by transmitting time of transmission as the sub-carrier

Two or more signals are quadrature modulated to increase bandwidth efficiency

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

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

E9A02: How much gain does a 1/2-wavelength dipole in free space have compared to an isotropic antenna?

1.55 dB

3.05 dB

4.30 dB

E9B14: What type of information can be obtained by submitting the details of a proposed new antenna to a modeling program?

SWR vs. frequency charts

Polar plots of the far-field elevation and azimuth patterns

Antenna gain

E9C07: What type of antenna pattern over real ground is shown in Figure E9-2?

Azimuth

Radiation resistance

Polarization

E9D09: What is an advantage of using top loading in a shortened HF vertical antenna?

Lower Q

Greater structural strength

Higher losses

E9E13: What is the purpose of a Wilkinson divider?

It divides the operating frequency of a transmitter signal so it can be used on a lower frequency band

It is used to feed high-impedance antennas from a low-impedance source

It is used to feed low-impedance loads from a high-impedance source

E9F08: What is the term for the ratio of the actual speed at which a signal travels through a transmission line to the speed of light in a vacuum?

Characteristic impedance

Surge impedance

Standing wave ratio

E9G01: Which of the following can be calculated using a Smith chart?

Radiation resistance

Antenna radiation pattern

Radio propagation

E9H11: What characteristic of a cardioid-pattern antenna is useful for direction finding?

A very sharp peak

Broad band response

High-radiation angle