Ham Extra License Practice Quiz

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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
Localized heating of the body from RF exposure in excess of the MPE limits
Ingestion of ozone gas from the cooling system
E1A03: With your transceiver displaying the carrier frequency of phone signals, you hear a DX station's CQ on 14.349 MHz USB. Is it legal to return the call using upper sideband on the same frequency?

Yes, because the DX station initiated the contact
Yes, because the displayed frequency is within the 20 meter band
No, my sidebands will extend beyond the band edge
No, USA stations are not permitted to use phone emissions above 14.340 MHz
E1B03: Within what distance must an amateur station protect an FCC monitoring facility from harmful interference?

1 mile
3 miles
10 miles
30 miles
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
E1D10: Which amateur stations are eligible to be telecommand stations?

Any amateur station designated by NASA
Any amateur station so designated by the space station licensee, subject to the privileges of the class of operator license held by the control operator
Any amateur station so designated by the ITU
All of these choices are correct
E1E14: For which types of out-of-pocket expenses do the Part 97 rules state that VEs and VECs may be reimbursed?

Preparing, processing, administering and coordinating an examination for an amateur radio license
Teaching an amateur operator license examination preparation course
No expenses are authorized for reimbursement
Providing amateur operator license examination preparation training materials
E1F08: Which of the following types of amateur station communications are prohibited?

Communications transmitted for hire or material compensation, except as otherwise provided in the rules
Communications that have a political content, except as allowed by the Fairness Doctrine
Communications that have a religious content
Communications in a language other than English
E2A09: What do the terms L band and S band specify with regard to satellite communications?

The 23 centimeter and 13 centimeter bands
The 2 meter and 70 centimeter bands
FM and Digital Store-and-Forward systems
Which sideband to use
E2B02: How many horizontal lines make up a fast-scan (NTSC) television frame?

30
60
525
1080
E2C10: Why might a DX station state that they are listening on another frequency?

Because the DX station may be transmitting on a frequency that is prohibited to some responding stations
To separate the calling stations from the DX station
To reduce interference, thereby improving operating efficiency
All of these choices are correct
E2D05: Which of the following techniques is normally used by low Earth orbiting digital satellites to relay messages around the world?

Digipeating
Store-and-forward
Multi-satellite relaying
Node hopping
E2E10: Which of these digital communications modes has the narrowest bandwidth?

MFSK16
170-Hz shift, 45 baud RTTY
PSK31
300-baud packet
E3A07: What frequency range would you normally tune to find EME signals in the 70 cm band?

430.000 - 430.150 MHz
430.100 - 431.100 MHz
431.100 - 431.200 MHz
432.000 - 432.100 MHz
E3B11: Which of the following describes gray-line propagation?

Backscatter contacts on the 10 meter band
Over the horizon propagation on the 6 and 2 meter bands
Long distance communications at twilight on frequencies less than 15 MHz
Tropospheric propagation on the 2 meter and 70 centimeter bands
E3C14: Why does the radio-path horizon distance exceed the geometric horizon?

E-region skip
D-region skip
Downward bending due to aurora refraction
Downward bending due to density variations in the atmosphere
E4A03: Which of the following parameters would a spectrum analyzer display on the vertical axis?

Amplitude
Duration
SWR
Q
E4B05: If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?

146.52 Hz
10 Hz
146.52 kHz
1465.20 Hz
E4C03: What is the term for the blocking of one FM phone signal by another, stronger FM phone signal?

Desensitization
Cross-modulation interference
Capture effect
Frequency discrimination
E4D12: What is the term for the reduction in receiver sensitivity caused by a strong signal near the received frequency?

Desensitization
Quieting
Cross-modulation interference
Squelch gain rollback
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 brute-force AC-line filter in series with the motor 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
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
47.3 kHz
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
14 degrees with the voltage lagging the current
76 degrees with the voltage leading the current
E5C08: In polar coordinates, what is the impedance of a network comprised of a 300-ohm-reactance inductor in series with a 400-ohm resistor?

400 ohms at an angle of 27 degrees
500 ohms at an angle of 37 degrees
500 ohms at an angle of 47 degrees
700 ohms at an angle of 57 degrees
E5D14: What is reactive power?

Wattless, nonproductive power
Power consumed in wire resistance in an inductor
Power lost because of capacitor leakage
Power consumed in circuit Q
E6A01: In what application is gallium arsenide used as a semiconductor material in preference to germanium or silicon?

In high-current rectifier circuits
In high-power audio circuits
At microwave frequencies
At very low frequency RF circuits
E6B06: Which of the following is a common use of a hot-carrier diode?

As balanced mixers in FM generation
As a variable capacitance in an automatic frequency control circuit
As a constant voltage reference in a power supply
As a VHF / UHF mixer or detector
E6C10: In Figure E6-5, what is the schematic symbol for a NOR gate?

1
2
3
4
E6D16: What is one reason for using ferrite toroids rather than powdered-iron toroids in an inductor?

Ferrite toroids generally have lower initial permeabilities
Ferrite toroids generally have better temperature stability
Ferrite toroids generally require fewer turns to produce a given inductance value
Ferrite toroids are easier to use with surface mount technology
E6E07: Which of the following techniques is typically used to construct a MMIC-based microwave amplifier?

Ground-plane construction
Microstrip construction
Point-to-point construction
Wave-soldering construction
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
E7A06: What is a characteristic of a monostable multivibrator?

It switches momentarily to the opposite binary state and then returns, after a set time, to its original state
It is a clock that produces a continuous square wave oscillating between 1 and 0
It stores one bit of data in either a 0 or 1 state
It maintains a constant output voltage, regardless of variations in the input voltage
E7B03: Which of the following forms the output of a class D amplifier circuit?

A low-pass filter to remove switching signal components
A high-pass filter to compensate for low gain at low frequencies
A matched load resistor to prevent damage by switching transients
A temperature-compensated load resistor to improve linearity
E7C13: What is one advantage of a Pi matching network over an L matching network consisting of a single inductor and a single capacitor?

The Q of Pi networks can be varied depending on the component values chosen
L networks cannot perform impedance transformation
Pi networks have fewer components
Pi networks are designed for balanced input and output
E7D15: What is the purpose of a "step-start" circuit in a high-voltage power supply?

To provide a dual-voltage output for reduced power applications
To compensate for variations of the incoming line voltage
To allow for remote control of the power supply
To allow the filter capacitors to charge gradually
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
E7F07: What determines the accuracy of a frequency counter?

The accuracy of the time base
The speed of the logic devices used
Accuracy of the AC input frequency to the power supply
Proper balancing of the mixer diodes
E7G15: What is the typical output impedance of an integrated circuit op-amp?

Very low
Very high
100 ohms
1000 ohms
E7H07: What is a magnetron oscillator?

An oscillator in which the output is fed back to the input by the magnetic field of a transformer
A crystal oscillator in which variable frequency is obtained by placing the crystal in a strong magnetic field
A UHF or microwave oscillator consisting of a diode vacuum tube with a specially shaped anode, surrounded by an external magnet
A reference standard oscillator in which the oscillations are synchronized by magnetic coupling to a rubidium gas tube
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 DC voltage causing the same amount of heating in a resistor as the corresponding RMS AC voltage
The AC voltage found by taking the square root of the average AC value
E8B08: What parameter does the modulating signal vary in a pulse-position modulation system?

The number of pulses per second
The amplitude of the pulses
The duration of the pulses
The time at which each pulse occurs
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
E8D14: Which of the following is a typical value for the peak-to-peak voltage at a standard U.S. household electrical outlet?

240 volts
120 volts
340 volts
170 volts
E9A10: How is antenna efficiency calculated?

(radiation resistance / transmission resistance) x 100%
(radiation resistance / total resistance) x 100%
(total resistance / radiation resistance) x 100%
(effective radiated power / transmitter output) x 100%
E9B13: What does the abbreviation NEC stand for when applied to antenna modeling programs?

Next Element Comparison
Numerical Electromagnetics Code
National Electrical Code
Numeric Electrical Computation
E9C07: What type of antenna pattern over real ground is shown in Figure E9-2?

Elevation
Azimuth
Radiation resistance
Polarization
E9D10: What is the approximate feed point impedance at the center of a two-wire folded dipole antenna?

300 ohms
72 ohms
50 ohms
450 ohms
E9E11: What is an effective way of matching a feed line to a VHF or UHF antenna when the impedances of both the antenna and feed line are unknown?

Use a 50-ohm 1:1 balun between the antenna and feed line
Use the "universal stub" matching technique
Connect a series-resonant LC network across the antenna feed terminals
Connect a parallel-resonant LC network across the antenna feed terminals
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
6.9 meters
24 meters
50 meters
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
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
By increasing either the number of wire turns in the loop or the area of the loop structure or both