ARRL t5 AND t6.txt

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mwinstom
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271863
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ARRL t5 AND t6.txt
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2014-04-25 10:33:03
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  1. Electrical current is measured in which of the following units?
    A. Volts
    B. Watts
    C. Ohms
    D. Amperes
    D
  2. Electrical power is measured in which of the following units?
    A. Volts
    B. Watts
    C. Ohms
    D. Amperes
    B
  3. What is the name for the flow of electrons in an electric circuit?
    A. Voltage
    B. Resistance
    C. Capacitance
    D. Current
    D
  4. 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
  5. What is the electrical term for the electromotive force (EMF) that causes electron flow?
    A. Voltage
    B. Ampere-hours
    C. Capacitance
    D. Inductance
    A
  6. 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
  7. Which of the following is a good electrical conductor?
    A. Glass
    B. Wood
    C. Copper
    D. Rubber
    C
  8. Which of the following is a good electrical insulator?
    A. Copper
    B. Glass
    C. Aluminum .
    D Mercury
    B
  9. 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
  10. Which term describes the rate at which electrical energy is used?
    A. Resistance
    B. Current
    C. Power
    D. Voltage
    C
  11. What is the basic unit of electromotive force?
    A. The volt
    B. The watt
    C. The ampere
    D. The ohm
    A
  12. How many milliamperes is 1.5 amperes?
    A. 15 milliamperes
    B. 150 milliamperes
    C. 1,500 milliamperes
    D. 15,000 milliamperes
    C
  13. What is another way to specify a radio signal frequency of 1,500,000 hertz?
    A. 1500 kHz
    B. 1500 MHz
    C. 15 GHz
    D. 150 kHz
    A
  14. How many volts are equal to one kilovolt?
    A. One one-thousandth of a volt
    B. One hundred volts
    C. One thousand volts
    D. One million volts
    C
  15. How many volts are equal to one microvolt?
    A. One one-millionth of a volt
    B. One million volts
    C. One thousand kilovolts
    D. One one-thousandth of a volt
    A
  16. Which of the following is equivalent to 500 milliwatts?
    A. 0.02 watts
    B. 0.5 watts
    C. 5 watts
    D. 50 watts
    B
  17. If an ammeter calibrated in amperes is used to measure a 3000-milliampere current, what reading would it show?
    A. 0.003 amperes
    B. 0.3 amperes
    C. 3 amperes
    D. 3,000,000 amperes
    C
  18. If a frequency readout calibrated in megahertz shows a reading of 3.525 MHz, what would it show if it were calibrated in kilohertz?
    A. 0.003525 kHz
    B. 35.25 kHz
    C. 3525 kHz
    D. 3,525,000 kHz
    C
  19. How many microfarads are 1,000,000 picofarads?
    A. 0.001 microfarads
    B. 1 microfarad
    C. 1000 microfarads
    D. 1,000,000,000 microfarads
    B
  20. What is the approximate amount of change, measured in decibels (dB), of a power increase from 5 watts to 10 watts?
    A. 2 dB
    B. 3 dB
    C. 5 Db
    D. 10 dB
    B
  21. What is the approximate amount of change, measured in decibels (dB), of a power decrease from 12 watts to 3 watts?
    A. 1 dB
    B. 3 dB
    C. 6 dB
    D. 9 db
    c
  22. What is the approximate amount of change, measured in decibels (dB), of a power increase from 20 watts to 200 watts?
    A. 10 dB
    B. 12 dB
    C. 18 dB
    D. 28 Db
    a
  23. What is the ability to store energy in an electric field called?
    A. Inductance
    B. Resistance
    C. Tolerance
    D. Capacitance
    D
  24. What is the basic unit of capacitance?
    A. The farad
    B. The ohm
    C. The volt
    D. The henry
    A
  25. What is the ability to store energy in a magnetic field called?
    A. Admittance
    B. Capacitance
    C. Resistance
    D. Inductance
    D
  26. What is the basic unit of inductance?
    A. The coulomb
    B. The farad
    C. The henry
    D. The ohm
    C
  27. What is the unit of frequency?
    A.HERTZ
    A
  28. What is the abbreviation that refers to radio frequency signals of all types?
    A. AF
    B. HF
    C. RF
    D. VHF
    C
  29. What is a usual name for electromagnetic waves that travel through space?
    A. Gravity waves
    B. Sound waves
    C. Radio waves
    D. Pressure waves
    C
  30. What is the formula used to calculate electrical power in a DC circuit?
    A. Power (P) equals voltage (E) multiplied by current (I)
    B. Power (P) equals voltage (E) divided by current (I)
    C. Power (P) equals voltage (E) minus current (I)
    D. Power (P) equals voltage (E) plus current (I)
    A
  31. How much power is being used in a circuit when the applied voltage is 13.8 volts DC and the current is 10 amperes?
    A. 138 watts
    B. 0.7 watts
    C. 23.8 watts
    D. 3.8 watts
    A
  32. How much power is being used in a circuit when the applied voltage is 12 volts DC and the current is 2.5 amperes?
    A. 4.8 watts
    B. 30 watts
    C. 14.5 watts
    D. 0.208 watts
    B
  33. How many amperes are flowing in a circuit when the applied voltage is 12 volts DC and the load is 120 watts?
    A. 0.1 amperes
    B. 10 amperes
    C. 12 amperes
    D. 132 amperes
    B
  34. What formula is used to calculate current in a circuit?
    A. Current (I) equals voltage (E) multiplied by resistance (R)
    B. Current (I) equals voltage (E) divided by resistance (R)
    C. Current (I) equals voltage (E) added to resistance (R)
    D. Current (I) equals voltage (E) minus resistance (R)
    B
  35. What formula is used to calculate voltage in a circuit?
    A. Voltage (E) equals current (I) multiplied by resistance (R)
    B. Voltage (E) equals current (I) divided by resistance (R)
    C. Voltage (E) equals current (I) added to resistance (R)
    D. Voltage (E) equals current (I) minus resistance (R)
    A
  36. What formula is used to calculate resistance in a circuit?
    A. Resistance (R) equals voltage (E) multiplied by current (I)
    B. Resistance (R) equals voltage (E) divided by current (I)
    C. Resistance (R) equals voltage (E) added to current (I)
    D. Resistance (R) equals voltage (E) minus current (I)
    B
  37. What is the resistance of a circuit in which a current of 3 amperes flows through a resistor connected to 90 volts?
    A. 3 ohms
    B. 30 ohms
    C. 93 ohms
    D. 270 ohms
    B
  38. What is the resistance in a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes?
    A. 18 ohms
    B. 0.125 ohms
    C. 8 ohms
    D. 13.5 ohms
    C
  39. What is the resistance of a circuit that draws 4 amperes from a 12-volt source?
    A. 3 ohms
    B. 16 ohms
    C. 48 ohms
    D. 8 Ohms
    A
  40. What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
    A. 9600 amperes
    B. 200 amperes
    C. 0.667 amperes
    D. 1.5 amperes
    D
  41. What is the current flowing through a 100-ohm resistor connected across 200 volts?
    A. 20,000 amperes
    B. 0.5 amperes
    C. 2 amperes
    D. 100 amperes
    C
  42. What is the current flowing through a 24-ohm resistor connected across 240 volts?
    A. 24,000 amperes
    B. 0.1 amperes
    C. 10 amperes
    D. 216 amperes
    C
  43. What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it?
    A. 1 volt
    B. 0.25 volts
    C. 2.5 volts
    D. 1.5 volts
    A
  44. What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it?
    A. 1 volt
    B. 10 volts
    C. 11 volts
    D. 9 volts
    B
  45. What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it?
    A. 8 volts
    B. 0.2 volts
    C. 12 volts
    D. 20 volts
    D
  46. What electrical component is used to oppose the flow of current in a DC circuit?
    A. Inductor
    B. Resistor
    C. Voltmeter
    D. Transformer
    B
  47. What type of component is often used as an adjustable volume control?
    A. Fixed resistor
    B. Power resistor
    C. Potentiometer
    D. Transformer
    C
  48. What electrical parameter is controlled by a potentiometer?
    A. Inductance
    B. Resistance
    C. Capacitance
    D. Field strength
    B
  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 type of electrical component stores energy in a magnetic field?
    A. Resistor
    B. Capacitor
    C. Inductor
    D. Diode
    C
  52. What electrical component is usually composed of a coil of wire?
    A. Switch
    B. Capacitor
    C. Diode
    D. Inductor
    D
  53. What electrical component is used to connect or disconnect electrical circuits?
    A. Zener Diode
    B. Switch
    C. Inductor
    D. Variable resistor
    B
  54. What electrical component is used to protect other circuit components from current overloads?
    A. Fuse
    B. Capacitor
    C. Shield
    D. Inductor
    A
  55. 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
  56. Which battery type is not rechargeable?
    A. Nickel-cadmium
    B. Carbon-zinc
    C. Lead-acid
    D. Lithium-ion
    B
  57. 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
  58. What electronic component allows current to flow in only one direction?
    A. Resistor
    B. Fuse
    C. Diode
    D. Driven Element
    C
  59. Which of these components can be used as an electronic switch or amplifier?
    A. Oscillator
    B. Potentiometer
    C. Transistor
    D. Voltmeter
    C
  60. Which of these components is made of three layers of semiconductor material?
    A. Alternator
    B. Bipolar junction transistor
    C. Triode
    D. Pentagrid converter
    B
  61. Which of the following electronic components can amplify signals?
    A. Transistor
    B. Variable resistor
    C. Electrolytic capacitor
    D. Multi-cell battery
    A
  62. 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
  63. What does the abbreviation "LED" stand for?
    A. Low Emission Diode
    B. Light Emitting Diode
    C. Liquid Emission Detector
    D. Long Echo Delay
    B
  64. What does the abbreviation "FET" stand for?
    A. Field Effect Transistor
    B. Fast Electron Transistor
    C. Free Electron Transition
    D. Field Emission Thickness
    A
  65. 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
  66. Which semiconductor component has an emitter electrode?
    A. Bipolar transistor
    B. Field effect transistor
    C. Silicon diode
    D. Bridge rectifier
    A
  67. Which semiconductor component has a gate electrode?
    A. Bipolar transistor
    B. Field effect transistor
    C. Silicon diode
    D. Bridge rectifier
    B
  68. 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
  69. What is the name for standardized representations of components in an electrical wiring diagram?
    A. Electrical depictions
    B. Grey sketch
    C. Schematic symbols
    D. Component callouts
    C

  70. What is component 1 in figure T1?
    A. Resistor
    B. Transistor
    C. Battery
    D. Connector
    A

  71. What is component 2 in figure T1?
    A. Resistor
    B. Transistor
    C. Indicator lamp
    D. Connector
    B

  72. What is component 3 in figure T1?
    A. Resistor
    B. Transistor
    C. Lamp
    D. Ground symbol
    C

  73. What is component 4 in figure T1?
    A. Resistor
    B. Transistor
    C. Battery
    D. Ground symbol
    C

  74. What is component 6 in figure T2?
    A. Resistor
    B. Capacitor
    C. Regulator IC
    D. Transistor
    B

  75. What is component 8 in figure T2?
    A. Resistor
    B. Inductor
    C. Regulator IC
    D. Light emitting diode
    D

  76. What is component 9 in figure T2?
    A. Variable capacitor
    B. Variable inductor
    C. Variable resistor
    D. Variable transformer
    C

  77. What is component 4 in figure T2?
    A. Variable inductor
    B. Double-pole switch
    C. Potentiometer
    D. Transformer
    D

  78. What is component 3 in figure T3?
    A. Connector
    B. Meter
    C. Variable capacitor
    D. Variable inductor
    D

  79. What is component 4 in figure T3?
    A. Antenna
    B. Transmitter
    C. Dummy load
    D. Ground
    A
  80. What do the symbols on an electrical circuit schematic diagram represent?
    A. Electrical components
    B. Logic states
    C. Digital codes
    D. Traffic nodes
    A
  81. Which of the following is accurately represented in electrical circuit schematic diagrams?
    A. Wire lengths
    B. Physical appearance of components
    C. The way components are interconnected
    D. All of these choices are correct
    C
  82. 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
  83. What best describes a relay?
    A. A switch controlled by an electromagnet
    B. A current controlled amplifier
    C. An optical sensor
    D. A pass transistor
    A

  84. What type of switch is represented by item 3 in figure T2?
    A. Single-pole single-throw
    B. Single-pole double-throw
    C. Double-pole single-throw
    D. Double-pole double-throw
    A
  85. Which of the following can be used to display signal strength on a numeric scale?
    A. Potentiometer
    B. Transistor
    C. Meter
    D. Relay
    C
  86. What type of circuit controls the amount of voltage from a power supply?
    A. Regulator
    B. Oscillator
    C. Filter
    D. Phase inverter
    A
  87. What component is commonly used to change 120V AC house current to a lower AC voltage for other uses?
    A. Variable capacitor
    B. Transformer
    C. Transistor
    D. Diode
    B
  88. Which of the following is commonly used as a visual indicator?
    A. LED
    B. FET
    C. Zener diode
    D. Bipolar transistor
    A
  89. Which of the following is used together with an inductor to make a tuned circuit?
    A. Resistor
    B. Zener diode
    C. Potentiometer
    D. Capacitor
    D
  90. What is the name of a device that combines several semiconductors and other components into one package?
    A. Transducer
    B. Multi-pole relay
    C. Integrated circuit
    D. Transformer
    C

  91. What is the function of component 2 in Figure T1?
    A. Give off light when current flows through it
    B. Supply electrical energy
    C. Control the flow of current
    D. Convert electrical energy into radio waves
    C
  92. Which of the following is a common use of coaxial cable?
    A. Carry dc power from a vehicle battery to a mobile radio
    B. Carry RF signals between a radio and antenna
    C. Secure masts, tubing, and other cylindrical objects on towers
    D. Connect data signals from a TNC to a computer
    B
  93. ARE YOU HAVING FUN YET
    A. YES
    B NO
    A

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