
Test
Authored by Razvan Robotin
Professional Development
9th Grade

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10 questions
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1.
FILL IN THE BLANK QUESTION
30 sec • 5 pts
Oțelurile sunt aliaje ale fierului cu carbonul, având un procentaj de carbon de până la .....................................
2.
FILL IN THE BLANK QUESTION
1 min • 5 pts
Aliajul cuprului cu zincul se numește.........................................
3.
FILL IN THE BLANK QUESTION
1 min • 5 pts
Aliajele cuprului cu staniul sau plumbul se numește......................................
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Simbolul OL37 semnifică:
Oțel carbon de calitate cu 0,37% carbon
Fontă cenușie
Oțel carbon cu rezistența mecanică la rupere de 37 daN/mm²
Oțel obișnuit
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Fonta de primă fuziune se obține prin topirea minereurilor de fier și amestecare acestora cu cocs în:
convetizoare
cuptoare electrice
cuptoare Siemens-Martin
furnal
6.
DRAW QUESTION
5 mins • 20 pts
Reprezentați pe desenul de mai jos ciclul unui tratament termic
7.
MULTIPLE CHOICE QUESTION
30 sec • 10 pts
La tratamentul termic de recoacere de lungă durată, răcirea se face:
în aer liber liniștit
în cuptor, odată cu cenușa caldă
în curenți de aer
în apă sau ulei
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