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Subel. G
6 questions
Subelement G

Inspections, Installations and Instruments:

Section 49

Test Equipment-1:

A 4 digit multi-meter with an accuracy of 0.15% and 2 counts is set on the 6 volt scale. What range of readings may be expected when measuring a 5 volt DC source?

  • Correct Answer
    4.99 to 5.01 volts DC
  • 4.98 to 5.02 volts DC
  • 4.97 to 5.02 volts DC
  • 4.95 to 5.05 volts DC
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A 4 digit multi-meter with an accuracy of 0.15% and 2 counts is set on the 60 volt scale. What range of readings may be expected when measuring a 24 volt DC source?

  • 23.74 to 24.52 volts DC
  • Correct Answer
    23.62 to 24.38 volts DC
  • 23.56 to 24.28 volts DC
  • 23.42 to 24.52 volts DC
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What is the most important specification for an R. F. Signal Generator used at VHF frequencies?

  • Frequency accuracy
  • Modulation percentage
  • Correct Answer
    Low signal leakage
  • Frequency modulation
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A good lab type signal generator for VHF measurements should be able to reduce its output to:

  • 5.0 microvolt
  • 1.0 microvolt
  • 0.5 microvolt
  • Correct Answer
    0.1 microvolt
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The characteristics of a 10:1 attenuation probe for an oscilloscope is as follows:

  • Correct Answer
    A load of about 10 megohms shunted by 12 pF.
  • A load of about 20 megohms shunted by a 12 mH coil.
  • A load of about 5 megohms shunted by 6 pF.
  • A load of about 5 megohms shunted by a 6 mH coil.
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In dual-trace oscilloscopes the purpose of the "Mode" control is to:

  • Select a choice between DC or AC input on either channel.
  • Correct Answer
    Select either channel alone or a combination of both channels.
  • Select the proper time base of either channel.
  • Select the proper frequency compensation for both channels.
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