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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 / 2 — IEB.AEN-Operational” contains 83 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.

Maintenance of alkaline batteries should include

One correct answer

  • checking the electrolyte weekly using a hydrometer
  • replacing the electrolyte every 5 years
  • trickle charging✓ Correct answer
  • replacment when the volts per cell drops below 1.8 VDC
The voltage output of an AC generator is accurately controlled by

One correct answer

  • changing the sensitivity of the prime mover to large changes in voltage
  • varying the reluctance of the air gap
  • varying the DC exciter voltage✓ Correct answer
  • shorting out part of the armature windings
One factor that determines the frequency of an alternator is the

One correct answer

  • number of turns of wire in the armature coil
  • speed of the rotor✓ Correct answer
  • strength of the magnets used
  • output voltage
Caution must be exercised during the charging of lead-acid storage batteries as

One correct answer

  • the acid will become weaker
  • hydrogen gas is being continuously liberated✓ Correct answer
  • both plates are changing chemically to lead sulfate
  • lead peroxide in the negative plate is poisonous
Which of the following conditions indicates that a lead-acid battery is being charged too rapidly?

One correct answer

  • Sparks occurring at the positive terminal.
  • Unusually high electrolyte specific gravity.
  • Low plate potentials being developed.
  • Excessively high temperatures and gassing rates.✓ Correct answer

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