Ham Extra License Practice Quiz

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E0A05: What is one of the potential hazards of using microwaves in the amateur radio bands?

Microwaves are ionizing radiation
The high gain antennas commonly used can result in high exposure levels
Microwaves often travel long distances by ionospheric reflection
The extremely high frequency energy can damage the joints of antenna structures
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
E1B12: What is the highest modulation index permitted at the highest modulation frequency for angle modulation?

.5
1.0
2.0
3.0
E1C04: When may an automatically controlled station retransmit third party communications?

Never
Only when transmitting RTTY or data emissions
When specifically agreed upon by the sending and receiving stations
When approved by the National Telecommunication and Information Administration
E1D02: What is the amateur satellite service?

A radio navigation service using satellites for the purpose of self training, intercommunication and technical studies carried out by amateurs
A spacecraft launching service for amateur-built satellites
A radio communications service using amateur radio stations on satellites
A radio communications service using stations on Earth satellites for public service broadcast
E1E03: What is a Volunteer Examiner Coordinator?

A person who has volunteered to administer amateur operator license examinations
A person who has volunteered to prepare amateur operator license examinations
An organization that has entered into an agreement with the FCC to coordinate amateur operator license examinations
The person who has entered into an agreement with the FCC to be the VE session manager
E1F14: Under what circumstances might the FCC issue a "Special Temporary Authority" (STA) to an amateur station?

To provide for experimental amateur communications
To allow regular operation on Land Mobile channels
To provide additional spectrum for personal use
To provide temporary operation while awaiting normal licensing
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 complete one revolution around the Earth
The time it takes for a satellite to travel from perigee to apogee
E2B01: How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?

30
60
90
120
E2C03: From which of the following bands is amateur radio contesting generally excluded?

30 meters
6 meters
2 meters
33 cm
E2D02: What is the definition of baud?

The number of data symbols transmitted per second
The number of characters transmitted per second
The number of characters transmitted per minute
The number of words transmitted per minute
E2E01: Which type of modulation is common for data emissions below 30 MHz?

DTMF tones modulating an FM signal
FSK
Pulse modulation
Spread spectrum
E3A02: What characterizes libration fading of an Earth-Moon-Earth signal?

A slow change in the pitch of the CW signal
A fluttery irregular fading
A gradual loss of signal as the Sun rises
The returning echo is several Hertz lower in frequency than the transmitted signal
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
E3C08: What is the name of the high-angle wave in HF propagation that travels for some distance within the F2 region?

Oblique-angle ray
Pedersen ray
Ordinary ray
Heaviside ray
E4A03: Which of the following parameters would a spectrum analyzer display on the vertical axis?

Amplitude
Duration
SWR
Q
E4B15: Which of the following can be used as a relative measurement of the Q for a series-tuned circuit?

The inductance to capacitance ratio
The frequency shift
The bandwidth of the circuit's frequency response
The resonant frequency of the circuit
E4C05: What does a value of -174 dBm/Hz represent with regard to the noise floor of a receiver?

The minimum detectable signal as a function of receive frequency
The theoretical noise at the input of a perfect receiver at room temperature
The noise figure of a 1 Hz bandwidth receiver
The galactic noise contribution to minimum detectable signal
E4D02: Which of the following describes two problems caused by poor dynamic range in a communications receiver?

Cross-modulation of the desired signal and desensitization from strong adjacent signals
Oscillator instability requiring frequent retuning and loss of ability to recover the opposite sideband
Cross-modulation of the desired signal and insufficient audio power to operate the speaker
Oscillator instability and severe audio distortion of all but the strongest received signals
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
E5A15: What is the resonant frequency of a series RLC circuit if R is 56 ohms, L is 40 microhenrys and C is 200 picofarads?

3.76 MHz
1.78 MHz
11.18 MHz
22.36 MHz
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
E5C23: Which point on Figure E5-2 best represents the impedance of a series circuit consisting of a 300-ohm resistor, a 0.64-microhenry inductor and an 85-picofarad capacitor at 24.900 MHz?

Point 1
Point 3
Point 5
Point 8
E5D06: In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?

In the same direction as the current
In a direction opposite to the current
In all directions; omnidirectional
In a direction determined by the left-hand rule
E6A11: In Figure E6-2, what is the schematic symbol for a P-channel junction FET?

1
2
3
6
E6B01: What is the most useful characteristic of a Zener diode?

A constant current drop under conditions of varying voltage
A constant voltage drop under conditions of varying current
A negative resistance region
An internal capacitance that varies with the applied voltage
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
The input switching threshold is about one-half the power supply voltage
Input signals are stronger
E6D09: What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of transistorized HF amplifiers?

Electrolytic capacitors
Butterworth filters
Ferrite beads
Steel-core toroids
E6E10: What is the equivalent circuit of a quartz crystal?

Motional capacitance, motional inductance and loss resistance in series, with a shunt capacitance representing electrode and stray capacitance
Motional capacitance, motional inductance, loss resistance, and a capacitor representing electrode and stray capacitance all in parallel
Motional capacitance, motional inductance, loss resistance, and a capacitor represent electrode and stray capacitance all in series
Motional inductance and loss resistance in series, paralleled with motional capacitance and a capacitor representing electrode and stray capacitance
E6F08: Why are optoisolators often used in conjunction with solid state circuits when switching 120 VAC?

Optoisolators provide a low impedance link between a control circuit and a power circuit
Optoisolators provide impedance matching between the control circuit and power circuit
Optoisolators provide a very high degree of electrical isolation between a control circuit and the circuit being switched
Optoisolators eliminate the effects of reflected light in the control circuit
E7A04: How many flip-flops are required to divide a signal frequency by 4?

1
2
4
8
E7B05: What can be done to prevent unwanted oscillations in an RF power amplifier?

Tune the stage for maximum SWR
Tune both the input and output for maximum power
Install parasitic suppressors and/or neutralize the stage
Use a phase inverter in the output filter
E7C06: What are the distinguishing features of an elliptical filter?

Gradual passband rolloff with minimal stop band ripple
Extremely flat response over its pass band with gradually rounded stop band corners
Extremely sharp cutoff with one or more notches in the stop band
Gradual passband rolloff with extreme stop band ripple
E7D09: What is the purpose of C1 in the circuit shown in Figure E7-3?

It resonates at the ripple frequency
It provides fixed bias for Q1
It decouples the output
It filters the supply voltage
E7E05: What circuit is added to an FM transmitter to boost the higher audio frequencies?

A de-emphasis network
A heterodyne suppressor
An audio prescaler
A pre-emphasis network
E7F08: Which of the following is performed by a frequency counter?

Determining the frequency deviation with an FM discriminator
Mixing the incoming signal with a WWV reference
Counting the number of input pulses occurring within a specific period of time
Converting the phase of the measured signal to a voltage which is proportional to the frequency
E7G12: What is an integrated circuit operational amplifier?

A high-gain, direct-coupled differential amplifier with very high input and very low output impedance
A digital audio amplifier whose characteristics are determined by components external to the amplifier
An amplifier used to increase the average output of frequency modulated amateur signals to the legal limit
An RF amplifier used in the UHF and microwave regions
E7H18: What are the major spectral impurity components of phase-locked loop synthesizers?

Phase noise
Digital conversion noise
Spurious signals at discrete frequencies
Nyquist limit noise
E8A14: Which of these methods is commonly used to convert analog signals to digital signals?

Sequential sampling
Harmonic regeneration
Level shifting
Phase reversal
E8B03: What is the modulation index of an FM-phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency, when the modulating frequency is 1000 Hz?

3
0.3
3000
1000
E8C05: What is the necessary bandwidth of a 13-WPM international Morse code transmission?

Approximately 13 Hz
Approximately 26 Hz
Approximately 52 Hz
Approximately 104 Hz
E8D02: What is the relationship between the peak-to-peak voltage and the peak voltage amplitude of a symmetrical waveform?

0.707:1
2:1
1.414:1
4:1
E9A09: What is meant by antenna bandwidth?

Antenna length divided by the number of elements
The frequency range over which an antenna satisfies a performance requirement
The angle between the half-power radiation points
The angle formed between two imaginary lines drawn through the element ends
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
E9C04: Which of the following describes a basic unterminated rhombic antenna?

Unidirectional; four-sides, each side one quarter-wavelength long; terminated in a resistance equal to its characteristic impedance
Bidirectional; four-sides, each side one or more wavelengths long; open at the end opposite the transmission line connection
Four-sides; an LC network at each corner except for the transmission connection;
Four-sides, each of a different physical length
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 wide flat copper strap
A cable with 6 or 7 18-gauge conductors in parallel
A single 12 or 10-gauge stainless steel wire
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
E9F13: What impedance does a 1/4-wavelength transmission line present to a generator when the line is shorted at the far end?

Very high impedance
Very low impedance
The same as the characteristic impedance of the transmission line
The same as the generator output impedance
E9G06: On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?

Prime axis
Reactance axis
Impedance axis
Polar axis
E9H09: Which of the following describes the construction of a receiving loop antenna?

A large circularly-polarized antenna
A small coil of wire tightly wound around a toroidal ferrite core
One or more turns of wire wound in the shape of a large open coil
A vertical antenna coupled to a feed line through an inductive loop of wire