Machine-translated by Google. Questions are authored in English.
Top

Discussion

The single most useful instrument in an electrical energy audit is

  • A.the power analyser
  • B.the multimeter
  • C.the insulation tester
  • D.the tachometer

Answer: A

Correct answer: the power analyser

A power analyser measures voltage, current, real and reactive power, power factor and harmonics simultaneously, and logs them over time - which is what an audit needs, since loads vary and a single reading proves nothing. A multimeter gives one quantity at one instant, and the insulation tester and tachometer answer quite different questions.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.