E0A07: How may dangerous levels of carbon monoxide from an emergency generator be detected?

By the odor

Any ordinary smoke detector can be used

By the yellowish appearance of the gas

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

E1C10: What types of amateur stations may automatically retransmit the radio signals of other amateur stations?

Only beacon, repeater or space stations

Only earth stations, repeater stations or model craft

Only auxiliary, beacon or space stations

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

E1E02: Where are the questions for all written US amateur license examinations listed?

In FCC Part 97

In a question pool maintained by the FCC

In the appropriate FCC Report and Order

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

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

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

E2C04: On which of the following frequencies is an amateur radio contest contact generally discouraged?

3.525 MHz

14.020 MHz

28.330 MHz

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

144.20 MHz

145.02 MHz

146.52 MHz

E2E02: What do the letters FEC mean as they relate to digital operation?

First Error Correction

Fatal Error Correction

Final Error Correction

E3A03: When scheduling EME contacts, which of these conditions will generally result in the least path loss?

When the Moon is full

When the Moon is at apogee

When the MUF is above 30 MHz

E3B07: Which of the following could account for hearing an echo on the received signal of a distant station?

High D layer absorption

Meteor scatter

Transmit frequency is higher than the MUF

E3C04: Which emission mode is best for Aurora propagation?

SSB

FM

RTTY

E4A05: Which of the following test instruments is used to display intermodulation distortion products in an SSB transmission?

A wattmeter

A logic analyzer

A time-domain reflectometer

E4B09: What is indicated if the current reading on an RF ammeter placed in series with the antenna feed line of a transmitter increases as the transmitter is tuned to resonance?

There is possibly a short to ground in the feed line

The transmitter is not properly neutralized

There is an impedance mismatch between the antenna and feed line

E4C08: How might lowering the noise figure affect receiver performance?

It would reduce the signal to noise ratio

It would reduce bandwidth

It would increase bandwidth

E4D10: What does a third-order intercept level of 40 dBm mean with respect to receiver performance?

Signals less than 40 dBm will not generate audible third-order intermodulation products

The receiver can tolerate signals up to 40 dB above the noise floor without producing third-order intermodulation products

A pair of 1 mW input signals will produce a third-order intermodulation product which is 40 dB stronger than the input signal

E4E08: What type of signal is picked up by electrical wiring near a radio antenna?

An electrical-sparking signal

A differential-mode signal at the AC power line frequency

Harmonics of the AC power line frequency

E5A08: What is the phase relationship between the current through and the voltage across a series 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

E5B08: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?

14 degrees with the voltage leading the current

76 degrees with the voltage leading the current

76 degrees with the voltage lagging the current

E5C11: What do the two numbers represent that are used to define a point on a graph using rectangular coordinates?

The magnitude and phase of the point

The sine and cosine values

The tangent and cotangent values

E5D17: How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200V AC at 5 amperes?

200 watts

1000 watts

1600 watts

E6A08: What term indicates the frequency at which the grounded-base current gain of a transistor has decreased to 0.7 of the gain obtainable at 1 kHz?

Corner frequency

Alpha rejection frequency

Beta cutoff frequency

E6B03: What special type of diode is capable of both amplification and oscillation?

Point contact

Zener

Junction

E6C10: In Figure E6-5, what is the schematic symbol for a NOR gate?

1

2

3

E6D11: How many turns will be required to produce a 1-mH inductor using a ferrite toroidal core that has an inductance index (A L) value of 523 millihenrys/1000 turns?

2 turns

4 turns

229 turns

E6E06: What characteristics of the MMIC make it a popular choice for VHF through microwave circuits?

The ability to retrieve information from a single signal even in the presence of other strong signals.

Plate current that is controlled by a control grid

Nearly infinite gain, very high input impedance, and very low output impedance

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

E7A13: What is an SR or RS flip-flop?

A speed-reduced logic device with high power capability

A speed-reduced logic device with very low voltage operation capability

A set/reset flip-flop that toggles whenever the T input is pulsed, unless both inputs are high

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

Nuvistor

Silicon controlled rectifier

Triac

E7C07: What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?

A band-pass filter

A Pi-network filter

An all-pass filter

E7D08: What type of circuit is shown in Figure E7-3?

Switching voltage regulator

Grounded emitter amplifier

Emitter follower

E7E07: What is meant by the term baseband in radio communications?

The lowest frequency band that the transmitter or receiver covers

The unmodulated bandwidth of the transmitted signal

The basic oscillator frequency in an FM transmitter that is multiplied to increase the deviation and carrier frequency

E7F06: What is one purpose of a marker generator?

To add audio markers to an oscilloscope

To provide a frequency reference for a phase locked loop

To add time signals to a transmitted signal

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

E7H16: Why is the short-term stability of the reference oscillator important in the design of a phase locked loop (PLL) frequency synthesizer?

Any amplitude variations in the reference oscillator signal will prevent the loop from locking to the desired signal

Any phase variations in the reference oscillator signal will produce harmonic distortion in the modulating signal

Any amplitude variations in the reference oscillator signal will prevent the loop from changing frequency

E8A12: What type of information can be conveyed using digital waveforms?

Human speech

Video signals

Data

E8B11: Which of the following describes frequency division multiplexing?

The transmitted signal jumps from band to band at a predetermined rate

The transmitted signal is divided into packets of information

Two or more information streams are merged into a digital combiner, which then pulse position modulates the transmitter

E8C07: What is the necessary bandwidth of a 4800-Hz frequency shift, 9600-baud ASCII FM transmission?

9.6 kHz

4.8 kHz

5.76 kHz

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

E9A04: Why would one need to know the feed point impedance of an antenna?

To measure the near-field radiation density from a transmitting antenna

To calculate the front-to-side ratio of the antenna

To calculate the front-to-back ratio of the antenna

E9B05: What usually occurs if a Yagi antenna is designed solely for maximum forward gain?

The front-to-back ratio increases

The frequency response is widened over the whole frequency band

The SWR is reduced

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

15 dB

3 dB

24 dB

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

E9E02: What is the name of an antenna matching system that matches an unbalanced feed line to an antenna by feeding the driven element both at the center of the element and at a fraction of a wavelength to one side of center?

The delta match

The epsilon match

The stub match

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

E9G10: What do the arcs on a Smith chart represent?

Frequency

SWR

Points with constant resistance

E9H04: What term describes station output, including the transmitter, antenna and everything in between, when considering transmitter power and system gains and losses?

Power factor

Half-power bandwidth

Apparent power