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IEB.AEN-Operational

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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 / OE2, OE3 / 6 — IEB.AEN-Operational” contains 47 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.

An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a

One correct answer

  • magnetic amplifier
  • ship's service alternator✓ Correct answer
  • three-wire DC generator
  • saturable core reactor
A three-phase, induction-type motor experiences an open in one phase Which of the listed automatic protective devices will prevent the machine from being damaged?

One correct answer

  • Overspeed trip
  • Thermal overload relay✓ Correct answer
  • Three-pole safety switch
  • Magnetic blowout coil
The winch shown in the illustration operates in any of the positions with the master switch in the 'lower' direction, but will not 'hoist' in any of the master switch hoist positions Which of the listed faults could be the cause?Question illustration

One correct answer

  • Master switch contact 'MS3' may have defective springs.✓ Correct answer
  • Contactor '3M' coil could have an open winding.
  • Contact '2M' in the power circuit may be badly corroded.
  • Series relay 'FR' may be open.
Excessive humming of AC contactors may be caused by

One correct answer

  • burnt arc shields
  • shorted armature coils
  • a broken shading coil✓ Correct answer
  • high voltage
Electrical leads and insulation on a motor should be painted with

One correct answer

  • heat-resisting acrylic
  • heat-resisting aluminum
  • insulating varnish✓ Correct answer
  • insulating white lead

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