Ham Extra License Practice Quiz


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

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

E1A02: When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the lowest frequency at which a properly adjusted LSB emission will be totally within the band?

The exact lower band edge
300 Hz above the lower band edge
1 kHz above the lower band edge
3 kHz above the lower band edge

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

E1C08: What is the maximum permissible duration of a remotely controlled station's transmissions if its control link malfunctions?

30 seconds
3 minutes
5 minutes
10 minutes

E1D11: Which amateur stations are eligible to operate as Earth stations?

Any amateur station whose licensee has filed a pre-space notification with the FCC's International Bureau
Only those of General, Advanced or Amateur Extra Class operators
Only those of Amateur Extra Class operators
Any amateur station, subject to the privileges of the class of operator license held by the control operator

E1E08: To which of the following examinees may a VE not administer an examination?

Employees of the VE
Friends of the VE
Relatives of the VE as listed in the FCC rules
All of 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

E2A12: What is one way to predict the location of a satellite at a given time?

By means of the Doppler data for the specified satellite
By subtracting the mean anomaly from the orbital inclination
By adding the mean anomaly to the orbital inclination
By calculations using the Keplerian elements for the specified satellite

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

30
60
90
120

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

E2D04: What is the purpose of digital store-and-forward functions on an Amateur Radio satellite?

To upload operational software for the transponder
To delay download of telemetry between satellites
To store digital messages in the satellite for later download by other stations
To relay messages between satellites

E2E09: Which of the following HF digital modes uses variable-length coding for bandwidth efficiency?

RTTY
PACTOR
MT63
PSK31

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

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

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

E4B07: Which of the following is good practice when using an oscilloscope probe?

Keep the signal ground connection of the probe as short as possible
Never use a high impedance probe to measure a low impedance circuit
Never use a DC-coupled probe to measure an AC circuit
All of these choices are correct

E4C06: A CW receiver with the AGC off has an equivalent input noise power density of -174 dBm/Hz. What would be the level of an unmodulated carrier input to this receiver that would yield an audio output SNR of 0 dB in a 400 Hz noise bandwidth?

174 dBm
-164 dBm
-155 dBm
-148 dBm

E4D03: How can intermodulation interference between two repeaters occur?

When the repeaters are in close proximity and the signals cause feedback in the final amplifier of one or both transmitters
When the repeaters are in close proximity and the signals mix in the final amplifier of one or both transmitters
When the signals from the transmitters are reflected out of phase from airplanes passing overhead
When the signals from the transmitters are reflected in phase from airplanes passing overhead

E4E07: How can you determine if line noise interference is being generated within your home?

By checking the power line voltage with a time domain reflectometer
By observing the AC power line waveform with an oscilloscope
By turning off the AC power line main circuit breaker and listening on a battery operated radio
By observing the AC power line voltage with a spectrum analyzer

E5A13: What is the half-power bandwidth of a parallel resonant circuit that has a resonant frequency of 14.25 MHz and a Q of 187?

38.1 kHz
76.2 kHz
1.332 kHz
2.665 kHz

E5B03: The capacitor in an RC circuit is discharged to what percentage of the starting voltage after two time constants?

86.5%
63.2%
36.8%
13.5%

E5C21: Which point on Figure E5-2 best represents the impedance of a series circuit consisting of a 300 ohm resistor and a 19 picofarad capacitor at 21.200 MHz?

Point 1
Point 3
Point 7
Point 8

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

E6A03: What are the majority charge carriers in P-type semiconductor material?

Free neutrons
Free protons
Holes
Free electrons

E6B10: In Figure E6-3, what is the schematic symbol for a light-emitting diode?

1
5
6
7

E6C08: In Figure E6-5, what is the schematic symbol for a NAND gate?

1
2
3
4

E6D14: Which is NOT true of a charge-coupled device (CCD)?

It uses a combination of analog and digital circuitry
It can be used to make an audio delay line
It is commonly used as an analog-to-digital converter
It samples and stores analog signals

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

E6F04: What is the photovoltaic effect?

The conversion of voltage to current when exposed to light
The conversion of light to electrical energy
The conversion of electrical energy to mechanical energy
The tendency of a battery to discharge when used outside

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"

E7B16: What is the effect of intermodulation products in a linear power amplifier?

Transmission of spurious signals
Creation of parasitic oscillations
Low efficiency
All of these choices are correct

E7C12: Which of the following describes a Pi-L network used for matching a vacuum-tube final amplifier to a 50-ohm unbalanced output?

A Phase Inverter Load network
A Pi network with an additional series inductor on the output
A network with only three discrete parts
A matching network in which all components are isolated from ground

E7D01: What is one characteristic of a linear electronic voltage regulator?

It has a ramp voltage as its output
It eliminates the need for a pass transistor
The control element duty cycle is proportional to the line or load conditions
The conduction of a control element is varied to maintain a constant output voltage

E7E11: Which of the following types of detector is well suited for demodulating SSB signals?

Discriminator
Phase detector
Product detector
Phase comparator

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

E7G14: What is the typical input impedance of an integrated circuit op-amp?

100 ohms
1000 ohms
Very low
Very high

E7H15: Which of these functions can be performed by a phase-locked loop?

Wide-band AF and RF power amplification
Comparison of two digital input signals, digital pulse counter
Photovoltaic conversion, optical coupling
Frequency synthesis, FM demodulation

E8A10: Which of the following is a distinguishing characteristic of a pulse waveform?

Regular sinusoidal oscillations
Narrow bursts of energy separated by periods of no signal
A series of tones that vary between two frequencies
A signal that contains three or more discrete tones

E8B06: What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?

2.14
0.214
0.47
47

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

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

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

Quarter-wave vertical
Yagi
Half-wave dipole
Isotropic antenna

E9B11: What is a disadvantage of decreasing the number of wire segments in an antenna model below the guideline of 10 segments per half-wavelength?

Ground conductivity will not be accurately modeled
The resulting design will favor radiation of harmonic energy
The computed feed point impedance may be incorrect
The antenna will become mechanically unstable

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

E9D01: How does the gain of an ideal parabolic dish antenna change when the operating frequency is doubled?

Gain does not change
Gain is multiplied by 0.707
Gain increases by 6 dB
Gain increases by 3 dB

E9E05: How must the driven element in a 3-element Yagi be tuned to use a hairpin matching system?

The driven element reactance must be capacitive
The driven element reactance must be inductive
The driven element resonance must be lower than the operating frequency
The driven element radiation resistance must be higher than the characteristic impedance of the transmission line

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

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

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