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10_IFAG

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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 — 10_IFAG” contains 249 questions across 5 collections.

Learning

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Sample questions and answers

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Reglarea temperaturii aburului supraincalzit se face intr-un schimbator de caldura racit cu apa de alimentare….

One correct answer

  • racirea aburului este un proces izocor;
  • racirea aburului este un proces izobar;✓ Correct answer
  • racirea aburului este un proces izobar-izoterm;
  • racirea aburului este un proces izentalp.
Calculati randamentul unei caldari cu supraincalzitor intermediar izobar pentru care se cunosc urmatoarele date: presiunea de vaporizare p1=60 bar, presiunea intermediara p2=0,25 p1, temperaturile de supraincalzire t si= 400 grade C, temperatura apei de alimentare taa=tsat-100 grade C, debitul nominal de abur D=20 to/h, randamentul vaporizatorului de 55%, puterea calorifica inferioara a combustibilului Qi=40MJ/kg.Destinderea in prima treapta a turbinei se considera adiabata...

One correct answer

  • 0,81;✓ Correct answer
  • 0,75;
  • 70%;
  • 95%.
Determinati randamentele si parametrii initiali ale unei turbine. Date cunoscute: temperatura aburului evacuat T=323[K]; titlul aburului dupa destindere politropica X pol=0,95; viteza aburului la iesirea din ajutaj(politropica) W pol=1000[m/s]; diferenta de titlu 0,1; apa de alimentare se preincalzeste pana la valoarea taa=tsat-100 grade C.

One correct answer

  • rand.int=0,8;
  • rand.int=0,68;✓ Correct answer
  • rand.int=0,9;
  • rand.int=0,75;
In timpul incalzirii se verifica..

One correct answer

  • sa nu existe scapari de abur sau apa , zgomote, pocnituri, sueraturi;✓ Correct answer
  • vidul din condensator;
  • puterea si turatia turbinei cu abur pentru antrenarea generatorului de curent electric;
  • amperajul electro-pompei de extractie condens.
Determinati diferenta de consum orar de combustibil pentru o caldarina care produce 2 to/h abur saturat cu p=1,1MPa, este alimentata cu combustibil cu Qi1=40MJ/Kg, randamentul de transfer 70 %, temperatura apei de alimentare t aa = 60 grade C, cand se alimenteaza cu un tip de combustibil cu Qi2= 10 200 Kcal/Kg...

One correct answer

  • dif ch = -12 Kg/h;
  • dif ch =+5Kg/h;
  • dif ch = - 5Kg/h;
  • dif ch =22,3 Kg/h;✓ Correct answer

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