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EL-RO / Elth + Aut / EB / 3

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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 — EL-RO / Elth + Aut / EB / 3” contains 146 questions across 1 collection.

Learning

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Sample questions and answers

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In schema alaturata - franarea dinamica in functie de timp pentru un motor de c.a. - ce se intampla dupa apasarea butonului O?Question illustration

One correct answer

  • se intrerupe circuitul contactorului de linie L si acesta se declanseaza;✓ Correct answer
  • motorul intra in regim de generator;
  • durata regimului de franare dinamica este determinata de temporizarea la inchidere a contactorului F 9-11;
In schema de mai jos - schema de actionare a ventilatorului din instalatia de ventilatie generala a navei si de aer conditionat - cum se realizeaza functionarea pe automat a instalatiei in raport cu necesitatea reglarii temperaturii aerului?Question illustration

One correct answer

  • bobina contactorului L actioneaza contactele sale L1 si L2 si motorul porneste;
  • punerea comutatorului pachet KP in pozitia "automat";✓ Correct answer
  • este alimentata electrovalvula L care elibereaza aer cald sau rece din instalatiile anexei respective;
Care sunt principalele avantaje ale actionarii electrice cu electromotor unic in comparatie cu alte sisteme de actionare a mecanismelor si instalatiilor navale?

One correct answer

  • simplificari de ordin constructiv si de exploatare in comparatie cu actionarea cu masina cu abur;✓ Correct answer
  • acest sistem prezinta cele mai mari pierderi de energie in transmisiile mecanice in comparatie cu celelalte sisteme de actionare electrica;
  • scade randamentul instalatiei in comparatie cu toate sistemele de actionare electrica sau mecanica;
Care sunt avantajele actionarii electrice individuale?

One correct answer

  • viteza mecanismului executor poate fi reglata dupa necesitati, lin sau treptat;✓ Correct answer
  • se complica la maxim transmisiile mecanice micsorand prin aceasta pierderile de energie;
  • viteza mecanismului executor nu poate fi reglata dupa necesitati, lin sau treptat;
In schema alaturata - schema electrica de comanda cu relee si contactoare a actionarii cabestanului de ancora cu motor asincron, in scurtcircuit, cu doua viteze - ce se intampla la trecerea manetei controlerului de comanda de pe pozitia "1 fila" pe pozitia "2 fila"?Question illustration

One correct answer

  • se inchide contactul K1 pentru a asigura o temporizare reglabila intre cele doua trepte de viteza;
  • motorul isi va spori viteza mentinandu-si sensul de rotatie pentru filarea ancorei;✓ Correct answer
  • se deschide contactul K5 alimentandu-se astfel contactorului Vm;

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