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Ro / ME + IEB / El.Bord / 11

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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 — ME.IEB-EL — Ro / ME + IEB / El.Bord / 11” contains 8 questions across 1 collection.

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Sample questions and answers

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Care sunt cauzele functionarii defectuoase in paralel a generatoarelor de c.c.cu excitatie derivatie ?

One correct answer

  • se observa o variatie a sarcinii intre cele doua generatoare, datorita fie a turatiilor diferite ale motoarelor primare de antrenare, fie a caracteristicilor externe ale generatoarelor (care nu sunt identice);✓ Correct answer
  • infasurarea rotorului unui generator este intrerupta sau are un contact imperfect;
  • circuitul de excitatie la un generator este intrerupt sau are un contact imperfect;
Care sunt cauzele pentru care la conectarea in retea a unui generator de c.c. tensiunea creste ?

One correct answer

  • amplificarea campului magnetic;
  • daca reteaua este pusa la masa, curentul de excitatie creste, provocand scaderea tensiunii;
  • conductorul face legatura intre reostatul de excitatie si infasurarea de excitatie derivatie este pus la masa;✓ Correct answer
Un generator de c.a. avand 227 KVA si factorul de putere 0.86 are o putere activa>

One correct answer

  • 200Kw
  • 195.22 Kw✓ Correct answer
  • 300,25 Kw
  • 227 Kw
Care sunt cauzele functionarii defectuoase in paralel a generatoarelor de c.c. ?

One correct answer

  • infasurarea rotorului unui generator este intrerupta sau are un contact imperfect;
  • circuitul de excitatie la un generator este intrerupt sau are un contact imperfect;
  • daca variatiile sarcinii nu sunt provocate de receptoarele consumatorilor, cauza este un defect al motorului principal;✓ Correct answer
Care sunt cauzele pentru care tensiunea la bornele generatorului de c.c. este normala iar sarcina scade ?

One correct answer

  • turatia motorului de antrenare este instabila;
  • la generatoarele cu excitatie mixta infasurarea serie este gresit conectata;✓ Correct answer
  • reostatul de excitatie este conectat gresit;

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