1. Amateur Extra Q & A Study Pool
Practice Quiz # 2
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2. 1. What is the direction of an ascending pass for an amateur satellite
1. What is the direction of an ascending pass for an amateur satellite? E2A01
A. From west to east
B. From east to west
C. From south to north
D. From north to south

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5. 2. What is the orbital period of an amateur satellite? E2A03
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 a satellite to travel from perigee to apogee

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8. 3. On what band would a satellite receive signals if it were operating in mode U/V? E2A06
A. 432 MHz
B. 144 MHz
C. 50 MHz
D. 28 MHz

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11. 4. What is one way to predict the location of a satellite at a given time? E2A12
A. By means of the Doppler data for the specified satellite
B. By subtracting the mean anomaly from the orbital inclination
C. By adding the mean anomaly to the orbital inclination
D. By calculations using the Keplerian elements for the specified satellite

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14. 5. What is blanking in a video signal? E2B04
A. Synchronization of the horizontal and vertical sync pulses
B. Turning off the scanning beam while it is traveling from right to left or from bottom to top
C. Turning off the scanning beam at the conclusion of a transmission
D. Transmitting a black and white test pattern

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17. 6. Which of the following is a common method of transmitting accompanying audio with amateur fast-scan television? E2B08
A. Frequency-modulated sub-carrier
B. A separate VHF or UHF audio link
C. Frequency modulation of the video carrier
D. All of these choices are correct

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20. 7. Which of the following is an acceptable bandwidth for Digital Radio Mondiale (DRM) based voice or SSTV digital transmissions made on the HF amateur bands? E2B10
A. 3 KHz
B. 10 KHz
C. 15 KHz
D. 20 KHz

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23. 8. How many lines are commonly used in each frame on an amateur slow-scan color
television picture? E2B13
A. 30 to 60
B. 60 or 100
C or 256
D or 360

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26. 9. Which of the following is NOT a characteristic of FMTV (Frequency-Modulated Amateur Television) as compared to vestigial sideband AM television? E2B17
A. Immunity from fading due to limiting
B. Poor weak signal performance
C. Greater signal bandwidth
D. Greater complexity of receiving equipment

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29. 10. From which of the following bands is amateur radio contesting generally excluded? E2C03
A. 30 meters
B. 6 meters
C. 2 meters
D. 33 cm

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32. 11. During a VHF/UHF contest, in which band section would you expect to find the highest level of activity? E2C06
A. At the top of each band, usually in a segment reserved for contests
B. In the middle of each band, usually on the national calling frequency
C. In the weak signal segment of the band, with most of the activity near the
calling frequency
D. In the middle of the band, usually 25 kHz above the national calling
frequency

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35. 12. How does the spread-spectrum technique of frequency hopping (FH) work? E2C09
A. If interference is detected by the receiver it will signal the transmitter
to change frequencies
B. If interference is detected by the receiver it will signal the transmitter
to wait until the frequency is clear
C. A pseudo-random binary bit stream is used to shift the phase of an RF
carrier very rapidly in a particular sequence
D. The frequency of the transmitted signal is changed very rapidly according to
a particular sequence also used by the receiving station

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38. 13. In North America during low sunspot activity, when signals from Europe become weak and fluttery across an entire HF band two to three hours after sunset, what might help to contact other European DX stations? E2C12
A. Switch to a higher frequency HF band, because the MUF has increased
B. Switch to a lower frequency HF band because the MUF has decreased
C. Wait 90 minutes or so for the signal degradation to pass
D. Wait 24 hours before attempting another communication on the band

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41. 14. Which of the follow is true when comparing HF and 2-meter packet operations? E2D03
A. HF packet typically uses FSK with a data rate of 300 baud; 2-meter packet uses AFSK with a data rate of 1200 baud
B. HF packet and 2-meter packet operations use different codes for information exchange
C. HF packet is limited to Amateur Extra class amateur licensees; 2-meter packet is open to all but Novice Class amateur licensees
D. HF and 2-meter packet operations are both limited to CW/Data-only band segments

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44. 15. Which of the following techniques is normally used by low-earth orbiting digital satellites to relay messages around the world? E2D05
A. Digipeating
B. Store and forward
C. Multi-satellite relaying
D. Node hopping

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47. 16. Which of the following types of packet frames is used to transmit APRS beacon data? E2D08
A. Connect frames
B. Disconnect frames
C. Acknowledgement frames
D. Unnumbered Information frames

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50. 17. How can an APRS station be used to help support a public service communications activity? E2D10
A. An APRS station with an emergency medical technician can automatically transmit medical data to the nearest hospital
B. APRS stations with General Personnel Scanners can automatically relay the participant numbers and time as they pass the check points
C. An APRS station with a GPS unit can automatically transmit information to show a mobile station's position during the event
D. All of these choices are correct

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53. 18. How is Forward Error Correction implemented? E2E03
A. By the receiving station repeating each block of three data characters
B. By transmitting a special algorithm to the receiving station along with the data characters
C. By transmitting extra data that may be used to detect and correct transmission errors
D. By varying the frequency shift of the transmitted signal according to a predefined algorithm

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56. 19. How does ARQ accomplish error correction? E2E05
A. Special binary codes provide automatic correction
B. Special polynomial codes provide automatic correction
C. If errors are detected, redundant data is substituted
D. If errors are detected, a retransmission is requested

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59. 20. Which of the following HF digital modes can be used to transfer binary files? E2E08
A. Hellschreiber
B. PACTOR
C. RTTY
D. AMTOR

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62. 21. Which of these digital communications modes has the narrowest bandwidth? E2E12
A. MFSK16
B. 170-Hz shift, 45 baud RTTY
C. PSK31
D. 300-baud packet

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