E0A08: What does SAR measure?

Synthetic Aperture Ratio of the human body

Signal Amplification Rating

The rate of RF energy reflected from stationary terrain

E1A08: If a station in a message forwarding system inadvertently forwards a message that is in violation of FCC rules, who is primarily accountable for the rules violation?

The control operator of the packet bulletin board station

The control operators of all the stations in the system

The control operators of all the stations in the system not authenticating the source from which they accept communications

E1B11: What is the permitted mean power of any spurious emission relative to the mean power of the fundamental emission from a station transmitter or external RF amplifier installed after January 1, 2003, and transmitting on a frequency below 30 MHZ?

At least 53 dB below

At least 63 dB below

At least 73 dB below

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

E1D08: Which VHF amateur service bands have frequencies available for space stations?

6 meters and 2 meters

6 meters, 2 meters, and 1.25 meters

2 meters and 1.25 meters

E1E06: Who is responsible for the proper conduct and necessary supervision during an amateur operator license examination session?

The VEC coordinating the session

The FCC

The VE session manager

E1F01: On what frequencies are spread spectrum transmissions permitted?

Only on amateur frequencies above 50 MHz

Only on amateur frequencies above 420 MHz

Only on amateur frequencies above 144 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

E2B12: How are analog SSTV images typically transmitted on the HF bands?

Video is converted to equivalent Baudot representation

Video is converted to equivalent ASCII representation

Varying tone frequencies representing the video are transmitted using PSK

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

E2D12: How does JT65 improve EME communications?

It controls the receiver to track Doppler shift

It supplies signals to guide the antenna to track the Moon

All of these choices are correct

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

48 baud

110 baud

1200 baud

E3A01: What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by Moon bounce?

500 miles, if the Moon is at perigee

2000 miles, if the Moon is at apogee

5000 miles, if the Moon is at perigee

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

E3C03: Where in the ionosphere does Aurora activity occur?

In the F1-region

In the F2-region

In the D-region

E4A04: Which of the following test instruments is used to display spurious signals from a radio transmitter?

A wattmeter

A logic analyzer

A time-domain reflectometer

E4B02: What is an advantage of using a bridge circuit to measure impedance?

It provides an excellent match under all conditions

It is relatively immune to drift in the signal generator source

It can display results directly in Smith chart format

E4C09: Which of the following choices is a good reason for selecting a high frequency for the design of the IF in a conventional HF or VHF communications receiver?

Fewer components in the receiver

Reduced drift

Improved receiver noise figure

E4D12: What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

Quieting

Cross-modulation interference

Squelch gain rollback

E4E11: Which of the following is the most likely cause if you are hearing combinations of local AM broadcast signals within one or more of the MF or HF ham bands?

The broadcast station is transmitting an over-modulated signal

You are receiving sky wave signals from a distant station

Your station receiver IF amplifier stage is defective

E5A11: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 7.1 MHz and a Q of 150?

157.8 Hz

315.6 Hz

23.67 kHz

E5B12: What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 75 ohms, R is 100 ohms, and XL is 50 ohms?

76 degrees with the voltage lagging the current

14 degrees with the voltage leading the current

76 degrees with the voltage leading the current

E5C21: Which point on Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and a 19 picofarad capacitor at 21.200 MHz?

Point 3

Point 7

Point 8

E5D07: What determines the strength of a magnetic field around a conductor?

The resistance divided by the current

The ratio of the current to the resistance

The diameter of the conductor

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

2

5

6

E6B11: What is used to control the attenuation of RF signals by a PIN diode?

A sub-harmonic pump signal

Reverse voltage larger than the RF signal

Capacitance of an RF coupling capacitor

E6C06: Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?

Larger bypass capacitors are used in CMOS circuit design

The input switching threshold is about two times the power supply voltage

Input signals are stronger

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

E6E09: Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?

Provide the crystal with a specified parallel inductance

Bias the crystal at a specified voltage

Bias the crystal at a specified current

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

E7A12: What is the name for logic which represents a logic "0" as a high voltage?

Reverse Logic

Assertive Logic

Positive Logic

E7B17: Why are third-order intermodulation distortion products of particular concern in linear power amplifiers?

Because they are relatively far in frequency from the desired signal

Because they invert the sidebands causing distortion

Because they maintain the sidebands, thus causing multiple duplicate signals

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

E7D14: What is one purpose of a "bleeder" resistor in a conventional (unregulated) power supply?

To cut down on waste heat generated by the power supply

To balance the low-voltage filament windings

To boost the amount of output current

E7E04: What is one way a single-sideband phone signal can be generated?

By using a reactance modulator followed by a mixer

By using a loop modulator followed by a mixer

By driving a product detector with a DSB signal

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

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

E7H02: What condition must exist for a circuit to oscillate?

It must have at least two stages

It must be neutralized

It must have negative feedback sufficient to cancel the input signal

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

E8B06: What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

0.214

0.47

47

E8C06: What is the necessary bandwidth of a 170-hertz shift, 300-baud ASCII transmission?

0.1 Hz

0.3 kHz

1.0 kHz

E8D15: Which of the following is a typical value for the RMS voltage at a standard U.S. household electrical power outlet?

340V AC

85V AC

170V AC

E9A12: Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3-30 MHz range?

The standing-wave ratio

Distance from the transmitter

Take-off angle

E9B13: What does the abbreviation NEC stand for when applied to antenna modeling programs?

Next Element Comparison

National Electrical Code

Numeric Electrical Computation

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

3

1

7

E9D06: Why should an HF mobile antenna loading coil have a high ratio of reactance to resistance?

To swamp out harmonics

To maximize losses

To minimize the Q

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

E9F13: What impedance does a 1/4-wavelength transmission line present to a generator when the line is shorted at the far end?

Very low impedance

The same as the characteristic impedance of the transmission line

The same as the generator output impedance

E9G04: What are the two families of circles and arcs that make up a Smith chart?

Resistance and voltage

Reactance and voltage

Voltage and impedance

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