Ham Extra License Practice Quiz

• Percentage: 0%; Correct: 0; Total: 0 of 50
E0A07: How may dangerous levels of carbon monoxide from an emergency generator be detected?

By the odor
Only with a carbon monoxide detector
Any ordinary smoke detector can be used
By the yellowish appearance of the gas
E1A05: What is the maximum power output permitted on the 60 meter band?

50 watts PEP effective radiated power relative to an isotropic radiator
50 watts PEP effective radiated power relative to a dipole
100 watts PEP effective radiated power relative to the gain of a half-wave dipole
100 watts PEP effective radiated power relative to an isotropic radiator
E1B02: Which of the following factors might cause the physical location of an amateur station apparatus or antenna structure to be restricted?

The location is near an area of political conflict
The location is of geographical or horticultural importance
The location is in an ITU zone designated for coordination with one or more foreign governments
The location is of environmental importance or significant in American history, architecture, or culture
E1C05: When may an automatically controlled station originate third party communications?

Never
Only when transmitting an RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
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
E1E04: Which of the following best describes the Volunteer Examiner accreditation process?

Each General, Advanced and Amateur Extra Class operator is automatically accredited as a VE when the license is granted
The amateur operator applying must pass a VE examination administered by the FCC Enforcement Bureau
The prospective VE obtains accreditation from the FCC
The procedure by which a VEC confirms that the VE applicant meets FCC requirements to serve as an examiner
E1F04: Which of the following geographic descriptions approximately describes "Line A"?

A line roughly parallel to and south of the US-Canadian border
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
E2A06: On what band would a satellite receive signals if it were operating in mode U/V?

435-438 MHz
144-146 MHz
50.0-50.2 MHz
29.5 to 29.7 MHz
E2B08: Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television?

Frequency-modulated sub-carrier
A separate VHF or UHF audio link
Frequency modulation of the video carrier
All of these choices are correct
E2C05: What is the function of a DX QSL Manager?

To allocate frequencies for DXpeditions
To handle the receiving and sending of confirmation cards for a DX station
To run a net to allow many stations to contact a rare DX station
To relay calls to and from a DX station
E2D08: Which of the following types of packet frames is used to transmit APRS beacon data?

Unnumbered Information
Disconnect
Acknowledgement
Connect
E2E12: Which type of digital communication does not support keyboard-to-keyboard operation?

Winlink
RTTY
PSK31
MFSK
E3A04: What type of receiving system is desirable for EME communications?

Equipment with very wide bandwidth
Equipment with very low dynamic range
Equipment with very low gain
Equipment with very low noise figures
E3B05: Which amateur bands typically support long-path propagation?

160 to 40 meters
30 to 10 meters
160 to 10 meters
6 meters to 2 meters
E3C11: From the contiguous 48 states, in which approximate direction should an antenna be pointed to take maximum advantage of aurora propagation?

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

A spectrum analyzer
A wattmeter
A logic analyzer
A time-domain reflectometer
E4B10: Which of the following describes a method to measure intermodulation distortion in an SSB transmitter?

Modulate the transmitter with two non-harmonically related radio frequencies and observe the RF output with a spectrum analyzer
Modulate the transmitter with two non-harmonically related audio frequencies and observe the RF output with a spectrum analyzer
Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a peak reading wattmeter
Modulate the transmitter with two harmonically related audio frequencies and observe the RF output with a logic analyzer
E4C10: Which of the following is a desirable amount of selectivity for an amateur RTTY HF receiver?

100 Hz
300 Hz
6000 Hz
2400 Hz
E4D05: What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?

146.34 MHz and 146.61 MHz
146.88 MHz and 146.34 MHz
146.10 MHz and 147.30 MHz
173.35 MHz and 139.40 MHz
E4E08: What type of signal is picked up by electrical wiring near a radio antenna?

A common-mode signal at the frequency of the radio transmitter
An electrical-sparking signal
A differential-mode signal at the AC power line frequency
Harmonics of the AC power line frequency
E5A06: What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?

It is at a minimum
It is at a maximum
It equals 1 divided by the quantity 2 times Pi, multiplied by the square root of inductance L multiplied by capacitance C
It equals 2 multiplied by Pi, multiplied by frequency "F", multiplied by inductance "L"
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
One time constant
E5C06: In polar coordinates, what is the impedance of a network consisting of a 100-ohm-reactance capacitor in series with a 100-ohm resistor?

121 ohms at an angle of -25 degrees
191 ohms at an angle of -85 degrees
161 ohms at an angle of -65 degrees
141 ohms at an angle of -45 degrees
E5D16: What is the power factor of an RL circuit having a 30 degree phase angle between the voltage and the current?

1.73
0.5
0.866
0.577
E6A16: What are the majority charge carriers in N-type semiconductor material?

Holes
Free electrons
Free protons
Free neutrons
E6B09: What is a common use for point contact diodes?

As a constant current source
As a constant voltage source
As an RF detector
As a high voltage rectifier
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
Lower power consumption
E6D07: What is the usable frequency range of inductors that use toroidal cores, assuming a correct selection of core material for the frequency being used?

From a few kHz to no more than 30 MHz
From less than 20 Hz to approximately 300 MHz
From approximately 10 Hz to no more than 3000 kHz
From about 100 kHz to at least 1000 GHz
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
Provide the crystal with a specified parallel capacitance
Bias the crystal at a specified voltage
Bias the crystal at a specified current
E6F01: What is photoconductivity?

The conversion of photon energy to electromotive energy
The increased conductivity of an illuminated semiconductor
The conversion of electromotive energy to photon energy
The decreased conductivity of an illuminated semiconductor
E7A07: What logical operation does a NAND gate perform?

It produces a logic "0" at its output only when all inputs are logic "0"
It produces a logic "1" at its output only when all inputs are logic "1"
It produces a logic "0" at its output if some but not all of its inputs are logic "1"
It produces a logic "0" at its output only when all inputs are logic "1"
E7B01: For what portion of a signal cycle does a Class AB amplifier operate?

More than 180 degrees but less than 360 degrees
Exactly 180 degrees
The entire cycle
Less than 180 degrees
E7C01: How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?

Two inductors are in series between the input and output, and a capacitor is connected between the two inductors and ground
Two capacitors are in series between the input and output and an inductor is connected between the two capacitors and ground
An inductor is connected between the input and ground, another inductor is connected between the output and ground, and a capacitor is connected between the input and output
A capacitor is connected between the input and ground, another capacitor is connected between the output and ground, and an inductor is connected between input and output
E7D05: Which of the following types of linear voltage regulator places a constant load on the unregulated voltage source?

A constant current source
A series regulator
A shunt current source
A shunt regulator
E7E09: What occurs when an excessive amount of signal energy reaches a mixer circuit?

Spurious mixer products are generated
Mixer blanking occurs
Automatic limiting occurs
A beat frequency is generated
E7F11: What is an advantage of a period-measuring frequency counter over a direct-count type?

It can run on battery power for remote measurements
It does not require an expensive high-precision time base
It provides improved resolution of low-frequency signals within a comparable time period
It can directly measure the modulation index of an FM transmitter
E7G09: What will be the output voltage of the circuit shown in Figure E7-4 if R1 is 1000 ohms, RF is 10,000 ohms, and 0.23 volts dc is applied to the input?

0.23 volts
2.3 volts
-0.23 volts
-2.3 volts
E7H13: What is the capture range of a phase-locked loop circuit?

The frequency range over which the circuit can lock
The voltage range over which the circuit can lock
The input impedance range over which the circuit can lock
The range of time it takes the circuit to lock
E8A05: What would be the most accurate way of measuring the RMS voltage of a complex waveform?

By using a grid dip meter
By measuring the voltage with a D'Arsonval meter
By using an absorption wavemeter
By measuring the heating effect in a known resistor
E8B04: What is the modulation index of an FM-phone signal having a maximum carrier deviation of plus or minus 6 kHz when modulated with a 2-kHz modulating frequency?

6000
3
2000
1/3
E8C13: What is one advantage of using JT-65 coding?

Uses only a 65 Hz bandwidth
The ability to decode signals which have a very low signal to noise ratio
Easily copied by ear if necessary
Permits fast-scan TV transmissions over narrow bandwidth
E8D10: What type of meter should be used to monitor the output signal of a voice-modulated single-sideband transmitter to ensure you do not exceed the maximum allowable power?

An SWR meter reading in the forward direction
A modulation meter
An average reading wattmeter
A peak-reading wattmeter
E9A02: How much gain does a 1/2-wavelength dipole in free space have compared to an isotropic antenna?

1.55 dB
2.15 dB
3.05 dB
4.30 dB
E9B08: How can the approximate beamwidth in a given plane of a directional antenna be determined?

Note the two points where the signal strength of the antenna is 3 dB less than maximum and compute the angular difference
Measure the ratio of the signal strengths of the radiated power lobes from the front and rear of the antenna
Draw two imaginary lines through the ends of the elements and measure the angle between the lines
Measure the ratio of the signal strengths of the radiated power lobes from the front and side of the antenna
E9C02: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/4-wavelength apart and fed 90 degrees out of phase?

A cardioid
A figure-8 end-fire along the axis of the array
A figure-8 broadside to the axis of the array
Omnidirectional
E9D12: What is one advantage of using a trapped antenna?

It has high directivity in the higher-frequency bands
It has high gain
It minimizes harmonic radiation
It may be used for multiband operation
E9E07: What term best describes the interactions at the load end of a mismatched transmission line?

Characteristic impedance
Reflection coefficient
Velocity factor
Dielectric constant
E9F01: What is the velocity factor of a transmission line?

The ratio of the characteristic impedance of the line to the terminating impedance
The index of shielding for coaxial cable
The velocity of the wave in the transmission line multiplied by the velocity of light in a vacuum
The velocity of the wave in the transmission line divided by the velocity of light in a vacuum
E9G11: How are the wavelength scales on a Smith chart calibrated?

In fractions of transmission line electrical frequency
In fractions of transmission line electrical wavelength
In fractions of antenna electrical wavelength
In fractions of antenna electrical frequency
E9H08: What is the function of a sense antenna?

It modifies the pattern of a DF antenna array to provide a null in one direction
It increases the sensitivity of a DF antenna array
It allows DF antennas to receive signals at different vertical angles
It provides diversity reception that cancels multipath signals