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EN-IEB.AEN / OE1 / 5

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About this collection

The ANR bank contains many sets with original names and codes, including navigation, safety and equipment topics. Select a module by name or use question search.

“ANR — EN-IEB.AEN / OE1 / 5” contains 51 questions across 1 collection.

Learning

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Exam

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Sample questions and answers

These examples come from the published collection. Choose Learning to study questions in sequence, or Exam to check your knowledge.

If a magnetic controller relay fails to drop out when the coil voltage is removed from the relay, the probable cause may be

One correct answer

  • excessive spring tension
  • overvoltage
  • excessive current
  • welded contacts✓ Correct answer
Humming or buzzing of electric contacts is a symptom of

One correct answer

  • low voltage on the operating coil✓ Correct answer
  • power failure to the operating coil
  • a control circuit ground
  • a control circuit overload
Which of the listed conditions describes the effect on intrinsic semiconductor operation as a result of a temperature increase?

One correct answer

  • Additional heat sinks will be required
  • Conductivity will increase✓ Correct answer
  • Conductivity will decrease
  • Resistivity will increase
The instant-start fluorescent tube:

One correct answer

  • has a single-pin connection at each end.
  • requires a very high starting voltage.
  • requires a bulkier and more expensive type of ballast.
  • all of these✓ Correct answer
A loud buzzing noise coming from the contacts in a magnetic controller can be caused by

One correct answer

  • excessive current
  • excessive magnet gap
  • bouncing of contacts
  • dirt on magnet faces✓ Correct answer

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