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

Discussion

A no-load run of a machine before dispatch is part of the routine tests because it

  • A.determines the efficiency of the machine at rated load
  • B.proves the insulation against the specified test voltage
  • C.measures the temperature rise the machine will reach
  • D.reveals mechanical faults and confirms the direction of rotation

Answer: D

Correct answer: reveals mechanical faults and confirms the direction of rotation

The no-load run is cheap and catches a great deal: bearing noise, rubbing, unbalance, a wrong connection, an incorrect direction of rotation. It proves nothing about the rated performance, which is why it sits alongside the electrical routine tests rather than replacing them.

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

Post your comment

Please log in or register to post a comment.