25 Chapters
TEST-BANK for
Electricity for the Trades
3rd Edition
Author(s): Petruzella
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Sample Questions
  • Thyristor semiconductors operate similar to rheostat to control current flow.
  • A PLC system has the ability to change the control scheme without having to physically change the wiring.
  • For the alternator connection shown, V equals:
  • The transistor is a two-terminal device.
  • A string of twelve holiday lamps is designed to be connected in series to a 120-V source. If one of ...
  • The main operating characteristic of a diode is that it allows current through it in both directions.
  • The triac is essentially equivalent to two SCRs connected in series.
  • The field-effect transistor (FET) is a current-controlled device.
  • For the electronic motor drive shown, the purpose of the controller is to alter the frequency of the ...
  • The bipolar junction transistor (BJT) is a current-controlled device.
  • Inverting the output of an OR gate will result in a NOR gate.
  • SCRs deliver a varying amount of power by means of phase angle control.
  • The main difference between the N and P type field effect transistors is that the polarities of ...
  • All inputs to an AND gate must be 1 to produce a 1 output.
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