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EN-MIEA / SMM, OM1 / 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 — 12_MIAE — EN-MIEA / SMM, OM1 / 5” contains 21 questions across 1 collection.

Learning

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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
The electrical energy necessary to power a sound-powered telephone's small vibrating bell is obtained from

One correct answer

  • the emergency batteries for the general alarm
  • each station's hand-cranked generator✓ Correct answer
  • the emergency switchboard
  • normal 115 volt DC supplies
The purpose of a magnetic relay is to

One correct answer

  • open a circuit only in the event of overload
  • remotely open and close contacts✓ Correct answer
  • provide overcurrent protection during starting
  • relay voltages at increased power
The diagrams shown in the illustration represent a/an

One correct answer

Question illustration
  • engine order telegraph circuit
  • rudder angle indicator arrangement
  • engine speed tachometer with repeaters
  • sound powered telephone system✓ Correct answer
A contactor differs from a relay in that:

One correct answer

  • it operates on a different principle.
  • its contacts can interrupt large motor currents.✓ Correct answer
  • gravity and spring tension open contacts.
  • all of these

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