
Materiais Cerâmicos
Authored by JOYCE SOARES
Construction
University
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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
As argilas possuem alta ____ quando úmidas, antes de serem queimadas.
plasticidade
elasticidade
resistência
fragilidade
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A matéria-prima principal empregada na fabricação de produtos cerâmicos são ____ e ____, sendo as primeiras responsáveis pela plasticidade e os segundos por reduzir a plasticidade.
os minerais e os plásticos
as argilas e os desengordurantes
as argilas e os carbonatos
as argilas e os cimentos
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
As cerâmicas refratárias são queimadas em temperaturas acima de 1500°C.
Verdadeiro
Falso
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A secagem no processo de fabricação de cerâmicas ocorre após a modelagem e após a queima.
Verdadeiro
Falso
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Quais são as ligações químicas presentes nos materiais cerâmicos?
Iônica, covalente e metálica
Iônica e metálica
Metálica e covalente
Iônica e covalente
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
O processo de vitrificação nas cerâmicas ocorre em temperaturas superiores a:
900°C
1000°C
1200°C
1500°C
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
A cerâmica que possui menor quantidade de vidro formado, como as porcelanas, tende a ter maior resistência mecânica e dureza.
Verdadeiro
Falso
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