
grile smbc
Quiz
•
Chemistry
•
1st - 3rd Grade
•
Medium
Laur Stoica
Used 2+ times
FREE Resource
34 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Punctul invariant peritectic al unui sistem binar cu compus binar incongruent este caracterizat de:
procesul de resorbtie a unei faze in topitura cu formarea de compus binar incongruent, in cazul procesului de cristalizare
temperatura cea mai mica de topire caracteristica subsistemului care asculta de acesta
temperatura de descompunere a compusului incongruent si unul dintre componentii sistemului, in cazul procesului de topire
temperatura cea mai mare de topire caracteristica a subsistemului care asculta de acesta
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Procesul de densificare a unui corp ceramic se poate realiza prin:
Vitrificare, prin reactii ce au loc in prezenta fazei lichide, proces insotit de contractie, la care transferul de masa se realizeaza prin deplasare plastica si vascoasa sau prin difuzie de volum (procese de solubilizare/cristalizare)
Sinterizare, prin intermediul reactiilor in faza solida, cu sau fara aparitia contractiei, transferul de masa putandu-se realiza fie prin difuzie superficiala sau sublimare/condensare, fie prin fluaj si difuzie de volum
Aplicarea unui tratament termic, indiferent de temperatura si palier
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
In ceea ce priveste tesutul dur este/sunt adevarate:
Este alcatuit in principal din colagen, hidroxiapatita carbonatata, apa, substanta organica de umplutura
Continutul in faza apatitica, dimensiunea cristalitelor, orientarea acestora influenteaza comportamentul mecanic al acestuia
Comportamentul mecanic al osului depinde de caracteristicile microstructurale ale acestuia (de exemplu de porozitate)
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Defectul de retea poate fi definit ca fiind:
Abatere liniara de la dispunerea atomilor, moleculelor sau ionilor
Totalitatea impuritatilor din retea
Dezordine totala
Abatere de la regula geometrica de dispunere in spatiu a atomilor, moleculelor sau ionilor
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Solutii solide interstitiale de formeaza daca:
Exista defecte intr-o retea
Diametrul unei speciei atomice este mult inferior diametrului spatiilor libere din reteaua celuilalt component
Diametrul unei speciei atom
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
In sisteme solide, o interactiune este cu atat mai puternica, cu cat:
Nivelul energetic, este mai scazut
Distanta de echilibru intre spatiile dintre atomi, ioni sau molecule este mai mica
Ponderea caracterului ionic sau covalent este mai mare
7.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Tesuturile sunt clasificate in functie de raportul de colagen:faza minerala in:
Tesuturi dure la care acest raport e supraunitar
Tesuturi moi la care acest raport e supraunitar
Tesuturi moi la care acest raport e supraunitar/subunitar
Tesuturi dure la care acest raport e subunitar
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