ARRL day 6.txt

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Author:
mwinstom
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269575
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ARRL day 6.txt
Updated:
2014-04-07 09:42:20
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  1. What might be the problem if you receive a report that your audio signal through the repeater is distorted or unintelligible?
    A. Your transmitter may be slightly off frequency
    B. Your batteries may be running low
    C. You could be in a bad location
    D. All of these choices are correct
    D
  2. What may happen if a transmitter is operated with the microphone gain set too high?
    A. The output power might be too high
    B. The output signal might become distorted
    C. The frequency might vary
    D. The SWR might increase
    B
  3. What can you do if you are told your FM handheld or mobile transceiver is over deviating?
    A. Talk louder into the microphone
    B. Let the transceiver cool off
    C. Change to a higher power level
    D. Talk farther away from the microphone
    D
  4. What should you do if you receive a report that your station’s transmissions are causing splatter or interference on nearby frequencies?
    A. Increase transmit power
    B. Change mode of transmission
    C. Report the interference to the equipment manufacturer
    D. Check your transmitter for off-frequency operation or spurious emissions
    D
  5. Which of the following would reduce ignition interference to a receiver?
    A. Change frequency slightly
    B. Decrease the squelch setting
    C. Turn on the noise blanker
    D. Use the RIT control
    C
  6. What could be happening if another operator reports a variable high-pitched whine on the audio from your mobile transmitter?
    A. Your microphone is picking up noise from an open window
    B. You have the volume on your receiver set too high
    C. You need to adjust your squelch control
    D. Noise on the vehicle’s electrical system is being transmitted along with your speech audio
    D
  7. What is the source of a high-pitched whine that varies with engine speed in a mobile transceiver’s receive audio?
    A. The ignition system
    B. The alternator
    C. The electric fuel pump
    D. Anti-lock braking system controllers
    B
  8. Which would you use to reduce RF current flowing on the shield of an audio cable?
    A. Band-pass filter
    B. Low-pass filter
    C. Preamplifier
    D. Ferrite choke
    D
  9. What type of filter should be connected to a TV receiver as the first step in trying to prevent RF overload from a nearby 2 meter transmitter?
    A. Low-pass filter
    B. High-pass filter
    C. Band-pass filter
    D. Band-reject filter
    D
  10. Where must a filter be installed to reduce harmonic emissions?
    A. Between the transmitter and the antenna
    B. Between the receiver and the transmitter
    C. At the station power supply
    D. At the microphone
    A
  11. Which of the following may be a cause of radio frequency interference?
    A. Fundamental overload
    B. Harmonics
    C. Spurious emissions
    D. All of these choices are correct
    D
  12. What is a symptom of RF feedback in a transmitter or transceiver?
    A. Excessive SWR at the antenna connection
    B. The transmitter will not stay on the desired frequency
    C. Reports of garbled, distorted, or unintelligible transmissions
    D. Frequent blowing of power supply fuses
    C
  13. What should you do first if someone tells you that your station’s transmissions are interfering with their radio or TV reception?
    A. Make sure that your station is functioning properly and that it does not cause interference to your own television
    B. Immediately turn off your transmitter and contact the nearest FCC office for assistance
    C. Tell them that your license gives you the right to transmit and nothing can be done to reduce the interference
    D. Continue operating normally because your equipment cannot possibly cause any interference
    A
  14. What is the most likely cause of interference to a non-cordless telephone from a nearby transmitter?
    A. Harmonics from the transmitter
    B. The telephone is inadvertently acting as a radio receiver
    C. Poor station grounding
    D. Improper transmitter adjustment
    b
  15. What is a logical first step when attempting to cure a radio frequency interference problem in a nearby telephone?
    A. Install a low-pass filter at the transmitter
    B. Install a high-pass filter at the transmitter
    C. Install an RF filter at the telephone
    D. Improve station grounding
    C
  16. Which of the following may be useful in correcting a radio frequency interference problem?
    A. Snap-on ferrite chokes
    B. Low-pass and high-pass filters
    C. Band-reject and band-pass filters
    D. All of these choices are correct
    D
  17. What should you do if a "Part 15" device in your neighbor’s home is causing harmful interference to your amateur station?
    A. Work with your neighbor to identify the offending device
    B. Politely inform your neighbor about the rules that require him to stop using the device if it causes interference
    C. Check your station and make sure it meets the standards of good amateur practice
    D. All of these choices are correct
    D
  18. What is the electrical term for the electromotive force (EMF) that causes electron flow?
    A. Voltage
    B. Ampere-hours
    C. Capacitance
    D. Inductance
    A
  19. What is the basic unit of electromotive force?
    A. The volt
    B. The watt
    C. The ampere
    D. The ohm
    A
  20. Which instrument would you use to measure electric potential or electromotive force?
    A. An ammeter
    B. A voltmeter
    C. A wavemeter
    D. An ohmmeter
    B
  21. What is the correct way to connect a voltmeter to a circuit?
    A. In series with the circuit
    B. In parallel with the circuit
    C. In quadrature with the circuit
    D. In phase with the circuit
    B
  22. What is the nominal voltage of a fully charged nickel-cadmium cell?
    A. 1.0 volts
    B. 1.2 volts
    C. 1.5 volts
    D. 2.2 volts
    B
  23. Which battery type is not rechargeable?
    A. Nickel-cadmium
    B. Carbon-zinc
    C. Lead-acid
    D. Lithium-ion
    B
  24. How much voltage does a mobile transceiver usually require?
    A. About 12 volts
    B. About 30 volts
    C. About 120 volts
    D. About 240 volts
    A
  25. Where should a mobile transceiver’s power negative connection be made?
    A. At the battery or engine block ground strap
    B. At the antenna mount
    C. To any metal part of the vehicle
    D. Through the transceiver’s mounting bracket
    A
  26. What is the name for the flow of electrons in an electric circuit?
    A. Voltage
    B. Resistance
    C. Capacitance
    D. Current
    D
  27. Which instrument is used to measure electric current?
    A. An ohmmeter
    B. A wavemeter
    C. A voltmeter
    D. An ammeter
    D
  28. How is an ammeter usually connected to a circuit?
    A. In series with the circuit
    B. In parallel with the circuit
    C. In quadrature with the circuit
    D. In phase with the circuit
    A
  29. Electrical current is measured in which of the following units?
    A. Volts
    B. Watts
    C. Ohms
    D. Amperes
    D
  30. Which of the following is a good electrical conductor?
    A. Glass
    B. Wood
    C. Copper
    D. Rubber
    C
  31. What is the name for a current that reverses direction on a regular basis?
    A. Alternating current
    B. Direct current
    C. Circular current
    D. Vertical current
    A
  32. What term describes the number of times per second that an alternating current reverses direction?
    A. Pulse rate
    B. Speed
    C. Wavelength
    D. Frequency
    D
  33. Which of the following devices or circuits changes an alternating current into a varying direct current signal?
    A. Transformer
    B. Rectifier
    C. Amplifier
    D. Reflector
    B
  34. What is the name for a current that flows only in one direction?
    A. Alternating current
    B. Direct current
    C. Normal current
    D. Smooth current
    B
  35. What electronic component allows current to flow in only one direction?
    A. Resistor
    B. Fuse
    C. Diode
    D. Driven Element
    C
  36. What are the names of the two electrodes of a diode?
    A. Plus and minus
    B. Source and drain
    C. Anode and cathode
    D. Gate and base
    C
  37. How is a semiconductor diode’s cathode lead usually identified?
    A. With the word "cathode"
    B. With a stripe
    C. With the letter "C"
    D. All of these choices are correct
    B
  38. What electrical component is used to oppose the flow of current in a DC circuit?
    A. Inductor
    B. Resistor
    C. Voltmeter
    D. Transformer
    B
  39. What instrument is used to measure resistance?
    A. An oscilloscope
    B. A spectrum analyzer
    C. A noise bridge
    D. An ohmmeter
    D
  40. What type of component is often used as an adjustable volume control?
    A. Fixed resistor
    B. Power resistor
    C. Potentiometer
    D. Transformer
    C
  41. What electrical parameter is controlled by a potentiometer?
    A. Inductance
    B. Resistance
    C. Capacitance
    D. Field strength
    B
  42. Which of the following is a good electrical insulator?
    A. Copper
    B. Glass
    C. Aluminum
    D. Mercury
    B
  43. What type of electrical component stores energy in a magnetic field?
    A. Resistor
    B. Capacitor
    C. Inductor
    D. Diode
    C
  44. What electrical component is usually composed of a coil of wire?
    A. Switch
    B. Capacitor
    C. Diode
    D. Inductor
    D
  45. What is the ability to store energy in a magnetic field called?
    A. Admittance
    B. Capacitance
    C. Resistance
    D. Inductance
    D
  46. What is the basic unit of inductance?
    A. The coulomb
    B. The farad
    C. The henry
    D. The ohm
    C
  47. What is the ability to store energy in an electric field called?
    A. Inductance
    B. Resistance
    C. Tolerance
    D. Capacitance
    D
  48. What is the basic unit of capacitance?
    A. The farad
    B. The ohm
    C. The volt
    D. The henry
    A
  49. What electrical component stores energy in an electric field?
    A. Resistor
    B. Capacitor
    C. Inductor
    D. Diode
    B
  50. What type of electrical component consists of two or more conductive surfaces separated by an insulator?
    A. Resistor
    B. Potentiometer
    C. Oscillator
    D. Capacitor
    D
  51. What electrical component is used to connect or disconnect electrical circuits?
    A. Zener Diode
    B. Switch
    C. Inductor
    D. Variable resistor
    B
  52. What electrical component is used to protect other circuit components from current overloads?
    A. Fuse
    B. Capacitor
    C. Shield
    D. Inductor
    A
  53. Which of these components can be used as an electronic switch or amplifier?
    A. Oscillator
    B. Potentiometer
    C. Transistor
    D. Voltmeter
    C
  54. What class of electronic components is capable of using a voltage or current signal to control current flow?
    A. Capacitors
    B. Inductors
    C. Resistors
    D. Transistors
    D
  55. Which of the following electronic components can amplify signals?
    A. Transistor
    B. Variable resistor
    C. Electrolytic capacitor
    D. Multi-cell battery
    A
  56. What is the term that describes a transistor's ability to amplify a signal?
    A. Gain
    B. Forward resistance
    C. Forward voltage drop
    D. On resistance
    A
  57. Which semiconductor component has an emitter electrode?
    A. Bipolar transistor
    B. Field effect transistor
    C. Silicon diode
    D. Bridge rectifier
    A
  58. Which of these components is made of three layers of semiconductor material?
    A. Alternator
    B. Bipolar junction transistor
    C. Triode
    D. Pentagrid converter
    B
  59. What does the abbreviation "FET" stand for?
    A. Field Effect Transistor
    B. Fast Electron Transistor
    C. Free Electron Transition
    D. Field Emission Thickness
    A
  60. Which semiconductor component has a gate electrode?
    A. Bipolar transistor
    B. Field effect transistor
    C. Silicon diode
    D. Bridge rectifier
    B

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