Ham Extra License Practice Quiz
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E0A01: What, if any, are the differences between the radiation produced by radioactive materials and the electromagnetic energy radiated by an antenna?
There is no significant difference between the two types of radiation
Only radiation produced by radioactivity can injure human beings
Radioactive materials emit ionizing radiation, while RF signals have less energy and can only cause heating
Radiation from an antenna will damage unexposed photographic film but ordinary radioactive materials do not cause this problem
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
E1B04: What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historical Places?
A proposal must be submitted to the National Park Service
A letter of intent must be filed with the National Audubon Society
An Environmental Assessment must be submitted to the FCC
A form FSD-15 must be submitted to the Department of the Interior
E1C03: How do the control operator responsibilities of a station under automatic control differ from one under local control?
Under local control there is no control operator
Under automatic control the control operator is not required to be present at the control point
Under automatic control there is no control operator
Under local control a control operator is not required to be present at a control point
E1D01: What is the definition of the term telemetry?
One-way transmission of measurements at a distance from the measuring instrument
Two-way radiotelephone transmissions in excess of 1000 feet
Two-way single channel transmissions of data
One-way transmission that initiates, modifies, or terminates the functions of a device at a distance
E1E11: What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?
Photocopy all examination documents and forward them to the FCC for processing
Three VEs must certify that the examinee is qualified for the license grant and that they have complied with the administering VE requirements
Issue the examinee the new or upgrade license
All these choices are correct
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
E2A02: What is the direction of a descending pass for an amateur satellite?
From north to south
From west to east
From east to west
From south to north
E2B13: How many lines are commonly used in each frame on an amateur slow-scan color television picture?
30 to 60
60 or 100
128 or 256
180 or 360
E2C04: On which of the following frequencies is an amateur radio contest contact generally discouraged?
3.525 MHz
14.020 MHz
28.330 MHz
146.52 MHz
E2D07: Which of the following digital protocols is used by APRS?
PACTOR
802.11
AX.25
AMTOR
E2E12: Which type of digital communication does not support keyboard-to-keyboard operation?
Winlink
RTTY
PSK31
MFSK
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
E3B10: What is the cause of gray-line propagation?
At midday, the Sun being directly overhead superheats the ionosphere causing increased refraction of radio waves
At twilight, D-layer absorption drops while E-layer and F-layer propagation remain strong
In darkness, solar absorption drops greatly while atmospheric ionization remains steady
At mid afternoon, the Sun heats the ionosphere decreasing radio wave refraction and the MUF
E3C13: What type of polarization is best for ground-wave propagation?
Vertical
Horizontal
Circular
Elliptical
E4A09: Which of the following describes a good method for measuring the intermodulation distortion of your own PSK signal?
Transmit into a dummy load, receive the signal on a second receiver, and feed the audio into the sound card of a computer running an appropriate PSK program
Multiply the ALC level on the transmitter during a normal transmission by the average power output
Use an RF voltmeter coupled to the transmitter output using appropriate isolation to prevent damage to the meter
All of these choices are correct
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
E4C04: What is the definition of the noise figure of a receiver?
The ratio of atmospheric noise to phase noise
The noise bandwidth in Hertz compared to the theoretical bandwidth of a resistive network
The ratio of thermal noise to atmospheric noise
The ratio in dB of the noise generated by the receiver compared to the theoretical minimum noise
E4D10: What does a third-order intercept level of 40 dBm mean with respect to receiver performance?
Signals less than 40 dBm will not generate audible third-order intermodulation products
The receiver can tolerate signals up to 40 dB above the noise floor without producing third-order intermodulation products
A pair of 40 dBm signals will theoretically generate a third-order intermodulation product with the same level as the input signals
A pair of 1 mW input signals will produce a third-order intermodulation product which is 40 dB stronger than the input signal
E4E01: Which of the following types of receiver noise can often be reduced by use of a receiver noise blanker?
Ignition noise
Broadband white noise
Heterodyne interference
All of these choices are correct
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"
E5B10: What is the relationship between the current through an inductor and the voltage across an inductor?
Voltage leads current by 90 degrees
Current leads voltage by 90 degrees
Voltage and current are 180 degrees out of phase
Voltage and current are in phase
E5C19: Which point on Figure E5-2 best represents that impedance of a series circuit consisting of a 400 ohm resistor and a 38 picofarad capacitor at 14 MHz?
Point 2
Point 4
Point 5
Point 6
E5D09: What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?
It is dissipated as heat in the circuit
It is repeatedly exchanged between the associated magnetic and electric fields, but is not dissipated
It is dissipated as kinetic energy in the circuit
It is dissipated in the formation of inductive and capacitive fields
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
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
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
E6D12: How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?
35 turns
13 turns
79 turns
141 turns
E6E06: What characteristics of the MMIC make it a popular choice for VHF through microwave circuits?
The ability to retrieve information from a single signal even in the presence of other strong signals.
Plate current that is controlled by a control grid
Nearly infinite gain, very high input impedance, and very low output impedance
Controlled gain, low noise figure, and constant input and output impedance over the specified frequency range
E6F12: What absorbs the energy from light falling on a photovoltaic cell?
Protons
Photons
Electrons
Holes
E7A04: How many flip-flops are required to divide a signal frequency by 4?
1
2
4
8
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
E7C07: What kind of filter would you use to attenuate an interfering carrier signal while receiving an SSB transmission?
A band-pass filter
A notch filter
A Pi-network filter
An all-pass filter
E7D11: What is the purpose of R1 in the circuit shown in Figure E7-3?
It provides a constant load to the voltage source
It couples hum to D1
It supplies current to D1
It bypasses hum around D1
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
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 provide a means of calibrating a receiver's frequency settings
To add time signals to a transmitted signal
E7G15: What is the typical output impedance of an integrated circuit op-amp?
Very low
Very high
100 ohms
1000 ohms
E7H11: What are the major spectral impurity components of direct digital synthesizers?
Broadband noise
Digital conversion noise
Spurious signals at discrete frequencies
Nyquist limit noise
E8A06: What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?
2.5 to 1
25 to 1
1 to 1
100 to 1
E8B10: Which of these methods can be used to combine several separate analog information streams into a single analog radio frequency signal?
Frequency shift keying
A diversity combiner
Frequency division multiplexing
Pulse compression
E8C10: What spread-spectrum communications technique alters the center frequency of a conventional carrier many times per second in accordance with a pseudo-random list of channels?
Frequency hopping
Direct sequence
Time-domain frequency modulation
Frequency 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
E9A13: How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?
3.85 dB
6.0 dB
8.15 dB
2.79 dB
E9B03: In the antenna radiation pattern shown in Figure E9-1, what is the front-to-side ratio?
12 dB
14 dB
18 dB
24 dB
E9C03: What is the radiation pattern of two 1/4-wavelength vertical antennas spaced 1/2-wavelength apart and fed in phase?
Omnidirectional
A cardioid
A Figure-8 broadside to the axis of the array
A Figure-8 end-fire along the axis of the array
E9D04: Why is it desirable for a ground-mounted satellite communications antenna system to be able to move in both azimuth and elevation?
In order to track the satellite as it orbits the Earth
So the antenna can be pointed away from interfering signals
So the antenna can be positioned to cancel the effects of Faraday rotation
To rotate antenna polarization to match that of the satellite
E9E09: Which of these matching systems is an effective method of connecting a 50-ohm coaxial cable feed line to a grounded tower so it can be used as a vertical antenna?
Double-bazooka match
Hairpin match
Gamma match
All of these choices are correct
E9F08: What is the term for the ratio of the actual speed at which a signal travels through a transmission line to the speed of light in a vacuum?
Velocity factor
Characteristic impedance
Surge impedance
Standing wave ratio
E9G07: On the Smith chart shown in Figure E9-3, what is the only straight line shown?
The reactance axis
The current axis
The voltage axis
The resistance axis
E9H07: Why is it advisable to use an RF attenuator on a receiver being used for direction finding?
It narrows the bandwidth of the received signal to improve signal to noise ratio
It compensates for the effects of an isotropic antenna, thereby improving directivity
It reduces loss of received signals caused by antenna pattern nulls, thereby increasing sensitivity
It prevents receiver overload which could make it difficult to determine peaks or nulls
