
Stiinta Materialelor
Quiz
•
Other
•
4th Grade
•
Hard
Gabriel Popa
Used 21+ times
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48 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
1) Care sunt sistemele cristaline cel mai des intalnite la metale?
Cubic cu volum centrat
Cubic cu fete centrate
Hexagonal
Monoclinic
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1) Care este sistemul cristalin care imprima cea mai mare deformabilitate plastica unui material metalic?
Cubic cu volum centrat
Cubic cu fete centrate
Tetragonal
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1) Odata cu cresterea defectelor de retea cristalina dintr-un material metalic creste si:
a) Plasticitatea
b) Duritatea
c) Rezistenta la coroziune
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1) La incalzirea unui material metalic, numarul de defecte cristaline din structura:
a) Scade
b) Creste
c) Ramane constant
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
1) La ecruisarea unui material metalic are loc:
a) Texturarea materialului
b) Cresterea densitatii de defecte de retea cristalina
c) Scaderea duritatii materialului
d) Cresterea rezistentei mecanice
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
1) Intr-un material metalic, duritate mare au:
a) Solutiile solide
b) Compusii chimici
c) Carburile
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
1) Bifati doar afirmatiile corecte:
a) Solidul cristalin si solidul amorf se obtin printr-o racire ultra rapida a topiturii
a) Una din principala caracteristica a solidului amorfestel ipsa unui punct fix de topire.
a) Reţeaua cristalină reprezinta o dispunere ordonată a atomilor într-un corp solid cristalin
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