Amateur Radio Extra Class (Element 4) [#0001]
![Amateur Radio Extra Class (Element 4) [#0001] - Quiz](https://www.proprofs.com/quiz-school/upload/yuiupload/764691784.jpg "Amateur Radio Extra Class (Element 4) [#0001] - Quiz")
Practice Examination for a FCC issued Amateur Radio Extra Class license (2008-2012 question pool). Class members are required to enter their callsign in the box labeled "Your Name" (appearing below) for homework credit.
- 1.What is meant by automatic control of a station?
- A.
The use of devices and procedures for control so that the control operator does not have to be present at a control point
- B.
A station operating with its output power controlled automatically
- C.
Remotely controlling a station's antenna pattern through a directional control link
- D.
The use of a control link between a control point and a locally controlled station
- 2.What is the only emission type permitted to be transmitted on the 60 meter band by an amateur station?
- A.
CW
- B.
RTTY Frequency shift keying
- C.
Single sideband, upper sideband only
- D.
Single sideband, lower sideband only
- 3.What is the minimum number of qualified VEs required to administer an Element 4 amateur operator license examination?
- A.
5
- B.
2
- C.
4
- D.
3
- 4.What is the amateur-satellite service?
- A.
A radio navigation service using satellites for the purpose of self-training, intercommunication and technical studies carried out by amateurs
- B.
A spacecraft launching service for amateur-built satellites
- C.
A radio communications service using amateur stations on satellites
- D.
A radio communications service using stations on Earth satellites for weather information gathering
- 5.What is the Radio Amateur Civil Emergency Service (RACES)?
- A.
A radio service using amateur service frequencies on a regular basis for communications that can reasonably be furnished through other radio services
- B.
A radio service of amateur stations for civil defense communications during periods of local, regional, or national civil emergencies
- C.
A radio service using amateur service frequencies for broadcasting to the public during periods of local, regional or national civil emergencies
- D.
A radio service using local government frequencies by Amateur Radio operators for civil emergency communications
- 6.Who may be the control operator of an auxiliary station?
- A.
Any licensed amateur operator
- B.
Only Technician, General, Advanced or Amateur Extra Class operators
- C.
Only General, Advanced or Amateur Extra Class operators
- D.
Only Amateur Extra Class operators
- 7.How should you generally sign your call when attempting to contact a DX station working a "pileup" or in a contest?
- A.
Send your full call sign once or twice
- B.
Send only the last two letters of your call sign until you make contact
- C.
Send your full call sign and grid square
- D.
Send the call sign of the DX station three times, the words "this is", then your call sign three times
- 8.On which of the following frequencies is one likely to find FMTV transmissions?
- A.
14.230 MHz
- B.
29.6 MHz
- C.
52.525 MHz
- D.
1255 MHz
- 9.Which of the following HF digital modes uses variable-length coding for bandwidth efficiency?
- A.
RTTY
- B.
PACTOR
- C.
MT63
- D.
PSK31
- 10.What is the orbital period of a satellite?
- A.
The point of maximum height of a satellite's orbit
- B.
The point of minimum height of a satellite's orbit
- C.
The time it takes for a satellite to complete one revolution around the Earth
- D.
The time it takes for a satellite to travel from perigee to apogee
- 11.When scheduling EME contacts, which of these conditions will generally result in the least path loss?
- A.
When the moon is at perigee
- B.
When the moon is full
- C.
When the moon is at apogee
- D.
When the MUF is above 30 MHz
- 12.From the contiguous 48 states, in which approximate direction should an antenna be pointed to take maximum advantage of auroral propagation?
- A.
South
- B.
North
- C.
East
- D.
West
- 13.What is the cause of gray-line propagation?
- A.
At midday, the sun, being directly overhead, superheats the ionosphere causing increased refraction of radio waves
- B.
At twilight, solar absorption drops greatly, while atmospheric ionization is not weakened enough to reduce the MUF
- C.
At darkness, solar absorption drops greatly, while atmospheric ionization remains steady
- D.
At mid afternoon, the sun heats the ionosphere, increasing radio wave refraction and the MUF
- 14.Which of the following procedures is an important precaution to follow when connecting a spectrum analyzer to a transmitter output?
- A.
Use high quality double shielded coaxial cables to reduce signal losses
- B.
Attenuate the transmitter output going to the spectrum analyzer
- C.
Match the antenna to the load
- D.
All of these choices are correct
- 15.What does the MDS of a receiver represent?
- A.
The meter display sensitivity
- B.
The minimum discernible signal
- C.
The multiplex distortion stability
- D.
The maximum detectable spectrum
- 16.What is the significance of voltmeter sensitivity expressed in ohms per volt?
- A.
The full scale reading of the voltmeter multiplied by its ohms per volt rating will provide the input impedance of the voltmeter
- B.
When used as a galvanometer, the reading in volts multiplied by the ohms/volt will determine the power drawn by the device under test
- C.
When used as an ohmmeter, the reading in ohms divided by the ohms/volt will determine the voltage applied to the circuit
- D.
When used as an ammeter, the full scale reading in amps divided by ohms/volt will determine the size of shunt needed
- 17.How can intermodulation interference between two repeaters occur?
- A.
When the repeaters are in close proximity and the signals cause feedback in one or both transmitter final amplifiers
- B.
When the repeaters are in close proximity and the signals mix in one or both transmitter final amplifiers
- C.
When the signals from the transmitters are reflected out of phase from airplanes passing overhead
- D.
When the signals from the transmitters are reflected in phase from airplanes passing overhead
- 18.How many watts are consumed in a circuit having a power factor of 0.6 if the input is 200V AC at 5 amperes?
- A.
200 watts
- B.
1000 watts
- C.
1600 watts
- D.
600 watts
- 19.How long does it take for an initial charge of 20 V DC to decrease to 7.36 V DC in a 0.01-microfarad capacitor when a 2-megohm resistor is connected across it?
- A.
0.02 seconds
- B.
0.04 seconds
- C.
20 seconds
- D.
40 seconds
- 20.What is the phase relationship between the current through and the voltage across a parallel resonant circuit?
- A.
The voltage leads the current by 90 degrees
- B.
The current leads the voltage by 90 degrees
- C.
The voltage and current are in phase
- D.
The voltage and current are 180 degrees out of phase
- 21.In polar coordinates, what is the impedance of a network consisting of a 300-ohm-reactance capacitor, a 600-ohm-reactance inductor, and a 400-ohm resistor, all connected in series?
- A.
500 ohms at an angle of 37 degrees
- B.
900 ohms at an angle of 53 degrees
- C.
400 ohms at an angle of 0 degrees
- D.
1300 ohms at an angle of 180 degrees
- 22.What type of semiconductor device varies its internal capacitance as the voltage applied to its terminals varies?
- A.
Varactor diode
- B.
Tunnel diode
- C.
Silicon-controlled rectifier
- D.
Zener diode
- 23.Which of these filter bandwidths would be a good choice for use with standard double-sideband AM transmissions?
- A.
1 kHz at -6 dB
- B.
500 Hz at -6 dB
- C.
6 kHz at -6 dB
- D.
15 kHz at -6 dB
- 24.What is a liquid-crystal display (LCD)?
- A.
A modern replacement for a quartz crystal oscillator which displays its fundamental frequency
- B.
A display that uses a crystalline liquid to change the way light is refracted
- C.
A frequency-determining unit for a transmitter or receiver
- D.
A display that uses a glowing liquid to remain brightly lit in dim light
- 25.What happens to the conductivity of a photoconductive material when light shines on it?
- A.
It increases
- B.
It decreases
- C.
It stays the same
- D.
It becomes unstable
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