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IEB.AEN-Manag

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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 / 6 — IEB.AEN-Manag” contains 53 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.

A four-pole induction motor, operating on three-phase 60 cycle current will operate at approximately

One correct answer

  • 850 RPM
  • 1,150 RPM
  • 1,750 RPM✓ Correct answer
  • 3,550 RPM
Which of the following represents the accepted method of cleaning dust and foreign particles from electrical equipment while limiting damage to electric components?

One correct answer

  • Carefully wiping off the components with a soft cotton rag.
  • Blowing a high velocity stream of compressed air rapidly across the components.
  • Using a vacuum cleaner to remove debris from the components.✓ Correct answer
  • Using carbon tetrachloride as a cleaning solvent to clean the components.
The torque produced by a motor when its shaft will not turn, even though rated voltage is applied to the stator, is known as

One correct answer

  • locked-rotor torque✓ Correct answer
  • pullout torque
  • breakdown torque
  • torque margin
The speed of a multi-speed, squirrel-cage, induction motor operating in a fixed frequency system can be changed by

One correct answer

  • reconnecting stator windings for different numbers of poles✓ Correct answer
  • changing the RPM of the rotor flux
  • changing the phase sequence of the applied voltage
  • reconnecting the stator so that no poles have the same polarity
During start-up of the circuit shown in the illustration EL-0081, it is noted that the ends of component "C" alternately glow and become dark without the tube illuminating The most probable cause for this is thatQuestion illustration

One correct answer

  • component "D" is loose and due to the ship's vibrations makes and breaks contact
  • the power system's voltage is fluctuating in and out of the range necessary for proper operation
  • component "A" is shorted and therefore unable to produce the high voltage required to start the lamp✓ Correct answer
  • component "B" contacts are opening and closing thus prohibiting sufficient current flow

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