ARRL Day 5.txt

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ARRL Day 5.txt
2014-03-31 11:35:20
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  1. What code is used when sending CW in the amateur bands?
    A. Baudot
    B. Hamming
    C. International Morse
    D. Gray
  2. Which of the following can be used to transmit CW in the amateur bands?
    A. Straight Key
    B. Electronic Keyer
    C. Computer Keyboard
    D. All of these choices are correct
  3. Which of the following is an example of a digital communications method?
    A. Packet
    B. PSK31
    C. MFSK
    D. All of these choices are correct
  4. Which of the following would be connected between a transceiver and computer in a packet radio station?
    A. Transmatch
    B. Mixer
    C. Terminal node controller
    D. Antenna
  5. How is the computer’s sound card used when conducting digital communications using a computer?
    A. The sound card communicates between the computer CPU and the video display
    B. The sound card records the audio frequency for video display
    C. The sound card provides audio to the microphone input and converts received audio to digital form
    D. All of these choices are correct
  6. Which of the following may be included in packet transmissions?
    A. A check sum which permits error detection
    B. A header which contains the call sign of the station to which the information is being sent
    C. Automatic repeat request in case of error
    D. All of these choices are correct
  7. What is a "parity" bit?
    A. A control code required for automatic position reporting
    B. A timing bit used to ensure equal sharing of a frequency
    C. An extra code element used to detect errors in received data
    D. A "triple width" bit used to signal the end of a character
  8. What does the acronym "BER" mean when applied to digital communications systems?
    A. Baud Enhancement Recovery
    B. Baud Error Removal
    C. Bit Error Rate
    D. Bit Exponent Resource
  9. What may occur if VHF or UHF data signals propagate over multiple paths?
    A. Transmission rates can be increased by a factor equal to the number of separate paths observed
    B. Transmission rates must be decreased by a factor equal to the number of separate paths observed
    C. No significant changes will occur if the signals are transmitting using FM
    D. Error rates are likely to increase
  10. What is a commonly used method of sending signals to and from a digital satellite?
    B. PSK31
    C. FM Packet
    D. WSJT
  11. What does the term APRS mean?
    A. Automatic Position Reporting System
    B. Associated Public Radio Station
    C. Auto Planning Radio Set-up
    D. Advanced Polar Radio System
  12. Which of the following is normally used when sending automatic location reports via amateur radio?
    A. A connection to the vehicle speedometer
    B. A WWV receiver
    C. A connection to a broadcast FM sub-carrier receiver
    D. A Global Positioning System receiver
  13. What does the abbreviation PSK mean?
    A. Pulse Shift Keying
    B. Phase Shift Keying
    C. Packet Short Keying
    D. Phased Slide Keying
  14. What is PSK31?
    A. A high-rate data transmission mode
    B. A method of reducing noise interference to FM signals
    C. A method of compressing digital television signal
    D. A low-rate data transmission mode
  15. What name is given to an amateur radio station that is used to connect other amateur stations to the Internet?
    A. A gateway
    B. A repeater
    C. A digipeater
    D. A beacon
  16. How might you obtain a list of active nodes that use VoIP?
    A. From the FCC Rulebook
    B. From your local emergency coordinator
    C. From a repeater directory
    D. From the local repeater frequency coordinator
  17. How do you select a specific IRLP node when using a portable transceiver?
    A. Choose a specific CTCSS tone
    B. Choose the correct DSC tone
    C. Access the repeater autopatch
    D. Use the keypad to transmit the IRLP node ID
  18. What is required in place of on-air station identification when sending signals to a radio control model using amateur frequencies?
    A. Voice identification must be transmitted every 10 minutes
    B. Morse code ID must be sent once per hour
    C. A label indicating the licensee’s name, call sign and address must be affixed to the transmitter
    D. A flag must be affixed to the transmitter antenna with the station call sign in 1 inch high letters or larger
  19. What is the maximum power allowed when transmitting telecommand signals to radio controlled models?
    A. 500 milliwatts
    B. 1 watt
    C. 25 watts
    D. 1500 watts
  20. What type of transmission is indicated by the term NTSC?
    A. A Normal Transmission mode in Static Circuit
    B. A special mode for earth satellite uplink
    C. An analog fast scan color TV signal
    D. A frame compression scheme for TV signal
  21. Which of the following devices is most useful for VHF weak-signal communication?
    A. A quarter-wave vertical antenna
    B. A multi-mode VHF transceiver
    C. An omni-directional antenna
    D. A mobile VHF FM transceiver
  22. Which of the following types of emission has the narrowest bandwidth?
    A. FM voice
    B. SSB voice
    C. CW
    D. Slow-scan TV
  23. What is the approximate maximum bandwidth required to transmit a CW signal?
    A. 2.4 kHz
    B. 150 Hz
    C. 1000 Hz
    D. 15 kHz
  24. What is the function of block 1 if figure T4 is a simple CW transmitter?
    A. Reactance modulator
    B. Product detector
    C. Low-pass filter
    D. Oscillator
  25. Which of the following is an appropriate receive filter to select in order to minimize noise and interference for CW reception?
    A. 500 Hz
    B. 1000 Hz
    C. 2400 Hz
    D. 5000 Hz
  26. What type of receiver is shown in Figure T6?
    A. Direct conversion
    B. Super-regenerative
    C. Single-conversion superheterodyne
    D. Dual-conversion superheterodyne
  27. What is the function of a product detector?
    A. Detect phase modulated signals
    B. Demodulate FM signals
    C. Detect CW and SSB signals
    D. Combine speech and RF signals
  28. Which of the following is a form of amplitude modulation?
    A. Spread-spectrum
    B. Packet radio
    C. Single sideband
    D. Phase shift keying
  29. What is the approximate bandwidth of a single sideband voice signal?
    A. 1 kHz
    B. 3 kHz
    C. 6 kHz
    D. 15 kHz
  30. Which of the following circuits combines a speech signal and an RF carrier?
    A. Beat frequency oscillator
    B. Discriminator
    C. Modulator
    D. Noise blanker
  31. What is the function of a mixer in a superheterodyne receiver?
    A. To reject signals outside of the desired passband
    B. To combine signals from several stations together
    C. To shift the incoming signal to an intermediate frequency
    D. To connect the receiver with an auxiliary device, such as a TNC
  32. What is the advantage of having multiple receive bandwidth choices on a multimode transceiver?
    A. Permits monitoring several modes at once
    B. Permits noise or interference reduction by selecting a bandwidth matching the mode
    C. Increases the number of frequencies that can be stored in memory
    D. Increases the amount of offset between receive and transmit frequencies
  33. Which of the following is an appropriate receive filter to select in order to minimize noise and interference for SSB reception?
    A. 500 Hz
    B. 1000 Hz
    C. 2400 Hz
    D. 5000 Hz
  34. Which of the following controls could be used if the voice pitch of a single-sideband signal seems too high or low?
    A. The AGC or limiter
    B. The bandwidth selection
    C. The tone squelch
    D. The receiver RIT or clarifier
  35. What does the term "RIT" mean?
    A. Receiver Input Tone
    B. Receiver Incremental Tuning
    C. Rectifier Inverter Test
    D. Remote Input Transmitter
  36. Where is an RF preamplifier installed?
    A. Between the antenna and receiver
    B. At the output of the transmitter's power amplifier
    C. Between a transmitter and antenna tuner
    D. At the receiver's audio output
  37. What is meant by fundamental overload in reference to a receiver?
    A. Too much voltage from the power supply
    B. Too much current from the power supply
    C. Interference caused by very strong signals
    D. Interference caused by turning the volume up too high
  38. Which term describes the ability of a receiver to discriminate between multiple signals?
    A. Tuning rate
    B. Sensitivity
    C. Selectivity
    D. Noise floor
  39. What determines the amount of deviation of an FM signal?
    A. Both the frequency and amplitude of the modulating signal
    B. The frequency of the modulating signal
    C. The amplitude of the modulating signal
    D. The relative phase of the modulating signal and the carrier
  40. What happens when the deviation of an FM transmitter is increased?
    A. Its signal occupies more bandwidth
    B. Its output power increases
    C. Its output power and bandwidth increases
    D. Asymmetric modulation occurs
  41. What circuit is pictured in Figure T7, if block 1 is a frequency discriminator?
    A. A double-conversion receiver
    B. A regenerative receiver
    C. A superheterodyne receiver
    D. An FM receiver
  42. Which of the following circuits demodulates FM signals?
    A. Limiter
    B. Discriminator
    C. Product detector
    D. Phase inverter
  43. What is the typical bandwidth of analog fast-scan TV transmissions on the 70 cm band?
    A. More than 10 MHz
    B. About 6 MHz
    C. About 3 MHz
    D. About 1 MHz