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EN-IEB.AEN / OE2, OE3 / 6

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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 — IEB.AEN-Operational — EN-IEB.AEN / OE2, OE3 / 6” contains 28 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 circuit breaker and a fuse have a basic similarity in that they both

One correct answer

  • can be reset to energize the circuit
  • should open the circuit when overloaded✓ Correct answer
  • will burn out when an over current flow develops
  • all of the above
A circuit is protected from overheating by a/an

One correct answer

  • pyrometer
  • thermal overload relay✓ Correct answer
  • magnetic contactor
  • overload transformer
The rated temperature rise of an electric motor is the

One correct answer

  • average temperature at any given latitude
  • normal temperature rise above the standard ambient temperature at rated load✓ Correct answer
  • average temperature rise due to resistance at 10% overload
  • permissible difference in the ambient temperature of the motor due to existing weather conditions
Under normal conditions, the speed of a two-speed squirrel cage induction motor is changed by varying the

One correct answer

  • frequency of the applied voltage
  • resistance in the rotor circuit
  • number of field poles✓ Correct answer
  • amplitude of the applied voltage
A circuit breaker differs from a fuse in that a circuit breaker

One correct answer

  • melts and must be replaced
  • is enclosed in a tube of insulating material with metal ferrules at each end
  • gives no visual indication of having opened the circuit
  • trips to break the circuit and may be reset✓ Correct answer

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