Ham Extra License Practice Quiz


• Percentage: 0%; Correct: 0; Total: 0 of 50

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

Polychlorinated biphenyls
Polyethylene
Polytetrafluroethylene
Polymorphic silicon

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 operator of the originating 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 43 dB below
At least 53 dB below
At least 63 dB below
At least 73 dB below

E1C07: What is meant by local control?

Controlling a station through a local auxiliary link
Automatically manipulating local station controls
Direct manipulation of the transmitter by a control operator
Controlling a repeater using a portable handheld transceiver

E1D09: Which amateur service UHF bands have frequencies available for a space station?

70 cm
70 cm, 23 cm, 13 cm
70 cm and 33 cm
33 cm and 13 cm

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
Each administering VE
The VE session manager

E1F13: What types of communications may be transmitted to amateur stations in foreign countries?

Business-related messages for non-profit organizations
Messages intended for connection to users of the maritime satellite service
Communications incidental to the purpose of the amateur service and remarks of a personal nature
All of these choices are correct

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

FM and CW
SSB and SSTV
PSK and Packet
All of these choices are correct

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

30
60
90
120

E2C06: During a VHF/UHF contest, in which band segment would you expect to find the highest level of activity?

At the top of each band, usually in a segment reserved for contests
In the middle of each band, usually on the national calling frequency
In the weak signal segment of the band, with most of the activity near the calling frequency
In the middle of the band, usually 25 kHz above the national calling frequency

E2D10: How can an APRS station be used to help support a public service communications activity?

An APRS station with an emergency medical technician can automatically transmit medical data to the nearest hospital
APRS stations with General Personnel Scanners can automatically relay the participant numbers and time as they pass the check points
An APRS station with a GPS unit can automatically transmit information to show a mobile station's position during the event
All of these choices are correct

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

Forward Error Correction
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 at perigee
When the Moon is full
When the Moon is at apogee
When the MUF is above 30 MHz

E3B06: Which of the following amateur bands most frequently provides long-path propagation?

80 meters
20 meters
10 meters
6 meters

E3C01: Which of the following effects does Aurora activity have on radio communications?

SSB signals are raspy
Signals propagating through the Aurora are fluttery
CW signals appear to be modulated by white noise
All of these choices are correct

E4A12: Which of the following procedures is an important precaution to follow when connecting a spectrum analyzer to a transmitter output?

Use high quality double shielded coaxial cables to reduce signal losses
Attenuate the transmitter output going to the spectrum analyzer
Match the antenna to the load
All of these choices are correct

E4B04: If a frequency counter with a specified accuracy of +/- 0.1 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

14.652 Hz
0.1 MHz
1.4652 Hz
1.4652 kHz

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
Easier for front-end circuitry to eliminate image responses
Improved receiver noise figure

E4D04: Which of the following may reduce or eliminate intermodulation interference in a repeater caused by another transmitter operating in close proximity?

A band-pass filter in the feed line between the transmitter and receiver
A properly terminated circulator at the output of the transmitter
A Class C final amplifier
A Class D final amplifier

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
Nearby corroded metal joints are mixing and re-radiating the broadcast signals
You are receiving sky wave signals from a distant station
Your station receiver IF amplifier stage is defective

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 in phase
The voltage and current are 180 degrees out of phase

E5B04: What is the time constant of a circuit having two 220-microfarad capacitors and two 1-megohm resistors, all in parallel?

55 seconds
110 seconds
440 seconds
220 seconds

E5C05: In polar coordinates, what is the impedance of a network consisting of a 400-ohm-reactance inductor in parallel 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
500 ohms at an angle of -53.1 degrees

E5D02: Why is the resistance of a conductor different for RF currents than for direct currents?

Because the insulation conducts current at high frequencies
Because of the Heisenburg Effect
Because of skin effect
Because conductors are non-linear devices

E6A04: What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?

Insulator impurity
N-type impurity
Acceptor impurity
Donor impurity

E6B13: What type of bias is required for an LED to emit light?

Reverse bias
Forward bias
Zero bias
Inductive bias

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

Low power consumption
Ability to connect many device outputs to a common bus
High speed operation
More efficient arithmetic operations

E6D08: What is one important reason for using powdered-iron toroids rather than ferrite toroids in an inductor?

Powdered-iron toroids generally have greater initial permeability
Powdered-iron toroids generally maintain their characteristics at higher currents
Powdered-iron toroids generally require fewer turns to produce a given inductance value
Powdered-iron toroids have higher power handling capacity

E6E12: What is a "Jones filter" as used as part of a HF receiver IF stage?

An automatic notch filter
A variable bandwidth crystal lattice filter
A special filter that emphasizes image responses
A filter that removes impulse noise

E6F02: What happens to the conductivity of a photoconductive material when light shines on it?

It increases
It decreases
It stays the same
It becomes unstable

E7A02: How many output level changes are obtained for every two trigger pulses applied to the input of a T flip-flop circuit?

None
One
Two
Four

E7B08: How can an RF power amplifier be neutralized?

By increasing the driving power
By reducing the driving power
By feeding a 180-degree out-of-phase portion of the output back to the input
By feeding an in-phase component of the output back to the input

E7C10: Which of the following filters would be the best choice for use in a 2 meter repeater duplexer?

A crystal filter
A cavity filter
A DSP filter
An L-C filter

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

Switching voltage regulator
Grounded emitter amplifier
Linear voltage regulator
Emitter follower

E7E02: What is the function of a reactance modulator?

To produce PM signals by using an electrically variable resistance
To produce AM signals by using an electrically variable inductance or capacitance
To produce AM signals by using an electrically variable resistance
To produce PM signals by using an electrically variable inductance or capacitance

E7F09: What is the purpose of a frequency counter?

To provide a digital representation of the frequency of a signal
To generate a series of reference signals at known frequency intervals
To display all frequency components of a transmitted signal
To provide a signal source at a very accurate frequency

E7G15: What is the typical output impedance of an integrated circuit op-amp?

Very low
Very high
100 ohms
1000 ohms

E7H12: Which of the following is a principal component of a direct digital synthesizer (DDS)?

Phase splitter
Hex inverter
Chroma demodulator
Phase accumulator

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

Human speech
Video signals
Data
All of these choices are correct

E8B09: What is meant by deviation ratio?

The ratio of the audio modulating frequency to the center carrier frequency
The ratio of the maximum carrier frequency deviation to the highest audio modulating frequency
The ratio of the carrier center frequency to the audio modulating frequency
The ratio of the highest audio modulating frequency to the average audio modulating frequency

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

Frequency hopping
Direct sequence
Binary phase-shift keying
Phase compandored spread-spectrum

E8D07: What is an electromagnetic wave?

Alternating currents in the core of an electromagnet
A wave consisting of two electric fields at right angles to each other
A wave consisting of an electric field and a magnetic field oscillating at right angles to each other
A wave consisting of two magnetic fields at right angles to each other

E9A03: Which of the following antennas has no gain in any direction?

Quarter-wave vertical
Yagi
Half-wave dipole
Isotropic antenna

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

36 dB
18 dB
24 dB
14 dB

E9C13: What is the main effect of placing a vertical antenna over an imperfect ground?

It causes increased SWR
It changes the impedance angle of the matching network
It reduces low-angle radiation
It reduces losses in the radiating portion of the antenna

E9D11: What is the function of a loading coil as used with an HF mobile antenna?

To increase the SWR bandwidth
To lower the losses
To lower the Q
To cancel capacitive reactance

E9E08: Which of the following measurements is characteristic of a mismatched transmission line?

An SWR less than 1:1
A reflection coefficient greater than 1
A dielectric constant greater than 1
An SWR greater than 1:1

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
Electrical signals move more slowly in a coaxial cable than in air

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

Resistance and voltage
Reactance and voltage
Resistance and reactance
Voltage and impedance

E9H01: What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2-dB feed line loss, 2.2-dB duplexer loss and 7-dBd antenna gain?

1977 watts
78.7 watts
420 watts
286 watts