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

Discussion

Which test checks a glow plug quickly?

  • A.Measuring the current drawn by the whole set, which reveals whether any one of the plugs has failed in service
  • B.Measuring its resistance, which should be very low
  • C.Measuring the voltage at the plug, which indicates whether the element within it has failed open circuit
  • D.A visual inspection

Answer: B

A sound plug reads well under two ohms and an open circuit one reads infinity. Current measurement of the set is genuinely a fast way to count working plugs, which makes the last option a real and useful technique. The order in which the effects act is what decides the outcome, so it is worth establishing first. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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

Post your comment

Please log in or register to post a comment.