Manager


Manager - WD4DAT
Manager Notes

Practice Exam - Extra

E1A06 [97.303(h)(1)]
1. Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
At the lowest frequency of the channel
At the center frequency of the channel
At the highest frequency of the channel
On any frequency where the signal's sidebands are within the channel

E1B05 [97.3]
2. What is the National Radio Quiet Zone?
An area in Puerto Rico surrounding the Arecibo Radio Telescope
An area in New Mexico surrounding the White Sands Test Area
An area surrounding the National Radio Astronomy Observatory
An area in Florida surrounding Cape Canaveral

E1C08 [97.213]
3. 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

E1D09 [97.207]
4. Which UHF amateur bands have frequencies authorized for space stations?
70 cm only
70 cm and 13 cm
70 cm and 33 cm
33 cm and 13 cm

E1E04 [97.509, 97.525]
5. Which of the following best describes the Volunteer Examiner accreditation process?
Each General, Advanced and Amateur Extra Class operator is automatically accredited as a VE when the license is granted
The amateur operator applying must pass a VE examination administered by the FCC Enforcement Bureau
The prospective VE obtains accreditation from the FCC
The procedure by which a VEC confirms that the VE applicant meets FCC requirements to serve as an examiner

E1F02 [97.107]
6. What privileges are authorized in the U.S. to persons holding an amateur service license granted by the government of Canada?
None, they must obtain a U.S. license
All privileges of the Amateur Extra Class license
The operating terms and conditions of the Canadian amateur service license, not to exceed U.S. Amateur Extra Class license privileges
Full privileges, up to and including those of the Amateur Extra Class license, on the 80, 40, 20, 15, and 10 meter bands

E2A01
7. What is the direction of an ascending pass for an amateur satellite?
From west to east
From east to west
From south to north
From north to south

E2B02
8. How many horizontal lines make up a fast-scan (NTSC) television frame?
30
60
525
1080

E2C05
9. What is the function of a DX QSL Manager?
To allocate frequencies for DXpeditions
To handle the receiving and sending of confirmation cards for a DX station
To run a net to allow many stations to contact a rare DX station
To relay calls to and from a DX station

E2D01
10. Which of the following digital modes is designed for meteor scatter communications?
WSPR
MSK144
Hellschreiber
APRS

E2E01
11. Which of the following types of modulation is common for data emissions below 30 MHz?
DTMF tones modulating an FM signal
FSK
Pulse modulation
Spread spectrum

E3A11
12. What is a typical range for tropospheric propagation of microwave signals?
10 miles to 50 miles
100 miles to 300 miles
1200 miles
2500 miles

E3B11
13. At what time of day can sporadic E propagation occur?
Only around sunset
Only around sunset and sunrise
Only in hours of darkness
Any time

E3C10
14. What does the 304A solar parameter measure?
The ratio of x-ray flux to radio flux, correlated to sunspot number
UV emissions at 304 angstroms, correlated to the solar flux index
The solar wind velocity at 304 degrees from the solar equator, correlated to solar activity
The solar emission at 304 GHz, correlated to x-ray flare levels

E4A05
15. What is the purpose of the prescaler function on a frequency counter?
It amplifies low-level signals for more accurate counting
It multiplies a higher frequency signal so a low-frequency counter can display the operating frequency
It prevents oscillation in a low-frequency counter circuit
It divides a higher frequency signal so a low-frequency counter can display the input frequency

E4B06
16. How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?
100 watts
125 watts
25 watts
75 watts

E4C15
17. What is reciprocal mixing?
Two out-of-band signals mixing to generate an in-band spurious signal
In-phase signals cancelling in a mixer resulting in loss of receiver sensitivity
Two digital signals combining from alternate time slots
Local oscillator phase noise mixing with adjacent strong signals to create interference to desired signals

E4D08
18. What causes intermodulation in an electronic circuit?
Too little gain
Lack of neutralization
Nonlinear circuits or devices
Positive feedback

E4E01
19. What problem can occur when using an automatic notch filter (ANF) to remove interfering carriers while receiving CW signals?
Removal of the CW signal as well as the interfering carrier
Any nearby signal passing through the DSP system will overwhelm the desired signal
Received CW signals will appear to be modulated at the DSP clock frequency
Ringing in the DSP filter will completely remove the spaces between the CW characters

E5A10
20. How is the Q of an RLC series resonant circuit calculated?
Reactance of either the inductance or capacitance divided by the resistance
Reactance of either the inductance or capacitance multiplied by the resistance
Resistance divided by the reactance of either the inductance or capacitance
Reactance of the inductance multiplied by the reactance of the capacitance

E5B12
21. What is admittance?
The inverse of impedance
The term for the gain of a field effect transistor
The turns ratio of a transformer
The inverse of Q factor

E5C08
22. What coordinate system is often used to display the phase angle of a circuit containing resistance, inductive and/or capacitive reactance?
Maidenhead grid
Faraday grid
Elliptical coordinates
Polar coordinates

E5D11
23. What is the power factor of an RL circuit having a 60-degree phase angle between the voltage and the current?
1.414
0.866
0.5
1.73

E6A04
24. 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

E6B02
25. What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?
Much higher reverse voltage breakdown
More constant reverse avalanche voltage
Longer carrier retention time
Less forward voltage drop

E6C06
26. Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?
Large bypass capacitance is inherent
The input switching threshold is about two times the power supply voltage
The input switching threshold is about one-half the power supply voltage
Bandwidth is very limited

E6D10
27. What is a primary advantage of using a toroidal core instead of a solenoidal core in an inductor?
Toroidal cores confine most of the magnetic field within the core material
Toroidal cores make it easier to couple the magnetic energy into other components
Toroidal cores exhibit greater hysteresis
Toroidal cores have lower Q characteristics

E6E08
28. How is power supplied to the most common type of MMIC?
Through a resistor and/or RF choke connected to the amplifier output lead
MMICs require no operating bias
Through a capacitor and RF choke connected to the amplifier input lead
Directly to the bias voltage (VCC IN) lead

E6F01
29. What absorbs the energy from light falling on a photovoltaic cell?
Protons
Photons
Electrons
Holes

E7A11
30. What type of logic defines "1" as a high voltage?
Reverse Logic
Assertive Logic
Negative logic
Positive Logic

E7B05
31. 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

E7C09
32. What is a crystal lattice filter?
A power supply filter made with interlaced quartz crystals
An audio filter made with four quartz crystals that resonate at 1kHz intervals
A filter using lattice-shaped quartz crystals for high-Q performance
A filter with narrow bandwidth and steep skirts made using quartz crystals ~~

E7D13
33. What is the equation for calculating power dissipated by a series linear voltage regulator?
Input voltage multiplied by input current
Input voltage divided by output current
Voltage difference from input to output multiplied by output current
Output voltage multiplied by output current

E7E10
34. How does a diode envelope detector function?
By rectification and filtering of RF signals
By breakdown of the Zener voltage
By mixing signals with noise in the transition region of the diode
By sensing the change of reactance in the diode with respect to frequency

E7F02
35. What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal?
An adaptive filter
A crystal-lattice filter
A Hilbert-transform filter
A phase-inverting filter

E7G06
36. What is the gain-bandwidth of an operational amplifier?
The maximum frequency for a filter circuit using that type of amplifier
The frequency at which the open-loop gain of the amplifier equals one
The gain of the amplifier at a filter's cutoff frequency
The frequency at which the amplifier's offset voltage is zero

E7H12
37. Which of the following must be done to ensure that a crystal oscillator provides the frequency specified by the crystal manufacturer?
Provide the crystal with a specified parallel inductance
Provide the crystal with a specified parallel capacitance
Bias the crystal at a specified voltage
Bias the crystal at a specified current

E8A10
38. What is the purpose of a low-pass filter used in conjunction with a digital-to-analog converter?
Lower the input bandwidth to increase the effective resolution
Improve accuracy by removing out-of-sequence codes from the input
Remove harmonics from the output caused by the discrete analog levels generated
All these choices are correct

E8B02
39. How does the modulation index of a phase-modulated emission vary with RF carrier frequency?
It increases as the RF carrier frequency increases
It decreases as the RF carrier frequency increases
It varies with the square root of the RF carrier frequency
It does not depend on the RF carrier frequency

E8C06
40. What is the bandwidth of a 170-hertz shift, 300-baud ASCII transmission?
0.1 Hz
0.3 kHz
0.5 kHz
1.0 kHz

E8D09
41. What is considered an acceptable maximum IMD level for an idling PSK signal?
+10 dB
+15 dB
-20 dB
-30 dB

E9A06
42. What is the effective radiated power relative to a dipole of a repeater station with 200 watts transmitter power output, 4 dB feed line loss, 3.2 dB duplexer loss, 0.8 dB circulator loss, and 10 dBd antenna gain?
317 watts
2000 watts
126 watts
300 watts

E9B06
43. What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?
45 degrees
75 degrees
7.5 degrees
25 degrees

E9C10
44. Which of the following describes a Zepp antenna?
A dipole constructed from zip cord
An end-fed dipole antenna
An omni-directional antenna commonly used for satellite communications
A vertical array capable of quickly changing the direction of maximum radiation by changing phasing lines

E9D06
45. What happens to the SWR bandwidth when one or more loading coils are used to resonate an electrically short antenna?
It is increased
It is decreased
It is unchanged if the loading coil is located at the feed point
It is unchanged if the loading coil is located at a voltage maximum point

E9E04
46. What is the purpose of the series capacitor in a gamma-type antenna matching network?
To provide DC isolation between the feed line and the antenna
To cancel the inductive reactance of the matching network
To provide a rejection notch that prevents the radiation of harmonics
To transform the antenna impedance to a higher value

E9F11
47. What impedance does a 1/8-wavelength transmission line present to a generator when the line is open at the far end?
The same as the characteristic impedance of the line
An inductive reactance
A capacitive reactance
Infinite

E9G03
48. Which of the following is often determined using a Smith chart?
Beam headings and radiation patterns
Satellite azimuth and elevation bearings
Impedance and SWR values in transmission lines
Trigonometric functions

E9H10
49. How can the output voltage of a multiple-turn receiving loop antenna be increased?
By reducing the permeability of the loop shield
By utilizing high impedance wire for the coupling loop
By winding adjacent turns in opposing directions
By increasing the number of turns and/or the area

E0A06
50. Why are there separate electric (E) and magnetic (H) field MPE limits?
The body reacts to electromagnetic radiation from both the E and H fields
Ground reflections and scattering make the field strength vary with location
E field and H field radiation intensity peaks can occur at different locations
All these choices are correct