E0A11: Which of the following injuries can result from using high-power UHF or microwave transmitters?

Hearing loss caused by high voltage corona discharge

Blood clotting from the intense magnetic field

Ingestion of ozone gas from the cooling system

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

E1B03: Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

3 miles

10 miles

30 miles

E1C09: Which of these frequencies are available for an automatically controlled repeater operating below 30 MHz?

18.110 - 18.168 MHz

24.940 - 24.990 MHz

10.100 - 10.150 MHz

E1D11: Which amateur stations are eligible to operate as Earth stations?

Any amateur station whose licensee has filed a pre-space notification with the FCC's International Bureau

Only those of General, Advanced or Amateur Extra Class operators

Only those of Amateur Extra Class operators

E1E13: What are the consequences of failing to appear for re-administration of an examination when so directed by the FCC?

The person may be fined or imprisoned

The licensee is disqualified from any future examination for an amateur operator license grant

All these choices are correct

E1F10: What is the maximum transmitter power for an amateur station transmitting spread spectrum communications?

1 W

1.5 W

1.5 kW

E2A07: Which of the following types of signals can be relayed through a linear transponder?

FM and CW

SSB and SSTV

PSK and Packet

E2B03: How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?

By scanning two fields simultaneously

By scanning each field from bottom to top

By scanning lines from left to right in one field and right to left in the next

E2C09: How does the spread-spectrum technique of frequency hopping work?

If interference is detected by the receiver it will signal the transmitter to change frequencies

If interference is detected by the receiver it will signal the transmitter to wait until the frequency is clear

A pseudo-random binary bit stream is used to shift the phase of an RF carrier very rapidly in a particular sequence

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

PACTOR

802.11

AMTOR

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

MFSK16

170-Hz shift, 45 baud RTTY

300-baud packet

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

E3B04: What type of propagation is probably occurring if an HF beam antenna must be pointed in a direction 180 degrees away from a station to receive the strongest signals?

Sporadic-E

Transequatorial

Auroral

E3C12: How does the maximum distance of ground-wave propagation change when the signal frequency is increased?

It stays the same

It increases

It peaks at roughly 14 MHz

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

E4B14: What happens if a dip meter is too tightly coupled to a tuned circuit being checked?

Harmonics are generated

Cross modulation occurs

Intermodulation distortion occurs

E4C10: Which of the following is a desirable amount of selectivity for an amateur RTTY HF receiver?

100 Hz

6000 Hz

2400 Hz

E4D02: Which of the following describes two problems caused by poor dynamic range in a communications receiver?

Oscillator instability requiring frequent retuning and loss of ability to recover the opposite sideband

Cross-modulation of the desired signal and insufficient audio power to operate the speaker

Oscillator instability and severe audio distortion of all but the strongest received signals

E4E05: How can noise from an electric motor be suppressed?

By installing a high pass filter in series with the motor's power leads

By installing a bypass capacitor in series with the motor leads

By using a ground-fault current interrupter in the circuit used to power the motor

E5A09: What is the phase relationship between the current through and the voltage across a parallel resonant circuit at resonance?

The voltage leads the current by 90 degrees

The current leads the voltage by 90 degrees

The voltage and current are 180 degrees out of phase

E5B02: What is the term for the time it takes for a charged capacitor in an RC circuit to discharge to 36.8% of its initial voltage?

One discharge period

An exponential discharge rate of one

A discharge factor of one

E5C02: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance inductor, a 100-ohm-reactance capacitor, and a 100-ohm resistor, all connected in series?

100 ohms at an angle of 90 degrees

10 ohms at an angle of 0 degrees

10 ohms at an angle of 90 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

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

2

5

6

E6B01: What is the most useful characteristic of a Zener diode?

A constant current drop under conditions of varying voltage

A negative resistance region

An internal capacitance that varies with the applied voltage

E6C04: Which of the following is the primary advantage of tri-state logic?

Low power consumption

High speed operation

More efficient arithmetic operations

E6D05: What is a liquid-crystal display (LCD)?

A modern replacement for a quartz crystal oscillator which displays its fundamental frequency

A frequency-determining unit for a transmitter or receiver

A display that uses a glowing liquid to remain brightly lit in dim light

E6E10: What is the equivalent circuit of a quartz crystal?

Motional capacitance, motional inductance, loss resistance, and a capacitor representing electrode and stray capacitance all in parallel

Motional capacitance, motional inductance, loss resistance, and a capacitor represent electrode and stray capacitance all in series

Motional inductance and loss resistance in series, paralleled with motional capacitance and a capacitor representing electrode and stray capacitance

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"

E7B08: How can an RF power amplifier be neutralized?

By increasing the driving power

By reducing the driving power

By feeding an in-phase component of the output back to the input

E7C03: What advantage does a Pi-L-network have over a Pi-network for impedance matching between the final amplifier of a vacuum-tube transmitter and an antenna?

Higher efficiency

Lower losses

Greater transformation range

E7D09: What is the purpose of C1 in the circuit shown in Figure E7-3?

It resonates at the ripple frequency

It provides fixed bias for Q1

It decouples the output

E7E11: Which of the following types of detector is well suited for demodulating SSB signals?

Discriminator

Phase detector

Phase comparator

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

E7G05: How can unwanted ringing and audio instability be prevented in a multi-section op-amp RC audio filter circuit?

Restrict gain, but increase Q

Restrict Q, but increase gain

Increase both gain and Q

E7H14: What is a phase-locked loop circuit?

An electronic servo loop consisting of a ratio detector, reactance modulator, and voltage-controlled oscillator

An electronic circuit also known as a monostable multivibrator

An electronic circuit consisting of a precision push-pull amplifier with a differential input

E8A08: What is the period of a wave?

The number of degrees in one cycle

The number of zero crossings in one cycle

The amplitude of the wave

E8B03: What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, when the modulating frequency is 1000 Hz?

0.3

3000

1000

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

E8D06: What is the advantage of using a peak-reading wattmeter to monitor the output of a SSB phone transmitter?

It is easier to determine the correct tuning of the output circuit

It makes it easier to detect high SWR on the feed line

It can determine if any flat-topping is present during modulation peaks

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

E9B02: In the antenna radiation pattern shown in Figure E9-1, what is the front-to-back ratio?

36 dB

24 dB

14 dB

E9C10: How many elevation lobes appear in the forward direction of the antenna radiation pattern shown in Figure E9-2?

3

1

7

E9D07: What is a disadvantage of using a multiband trapped antenna?

It radiates the harmonics and fundamental equally well

It is too sharply directional at lower frequencies

It must be neutralized

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

E9F09: What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically one-quarter wavelength long at 7.2 MHz?

10 meters

24 meters

50 meters

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

E9H07: Why is it advisable to use an RF attenuator on a receiver being used for direction finding?

It narrows the bandwidth of the received signal to improve signal to noise ratio

It compensates for the effects of an isotropic antenna, thereby improving directivity

It reduces loss of received signals caused by antenna pattern nulls, thereby increasing sensitivity