
Test Tema 12
Authored by Rocío Moro
Other
1st Grade
Used 9+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La cementita eutéctica aparece durante el enfriamiento de las aleaciones Fe-C a menor temperatura que la cementita eutectoide.
Verdadero
Falso
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
El contenido de carbono de un acero eutectoide es del:
0.02 %.
0.77%.
2.11 %.
4.30%
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Respecto a los tratamientos térmicos de los aceros al carbono:
El revenido es un tratamiento previo al temple.
En la etapa de calentamiento, nunca debe alcanzarse la región austenftica.
El temple se realiza sacando la pieza del horno y dejándola enfriar al aire.
El tratamiento de temple da lugar a una estructura muy dura y frágil.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En un acero, al aumentar su contenido en carbono, aumenta tanto su resistencia a tracción como su ductilidad
Verdadero
Falso
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Una de las siguientes fases del diagrama de los aceros presenta estructura CCC (cúbica centrada en las caras), ¿de cuál se trata?
Ferrita-(alfa).
Ferrita-(beta).
Austenita.
Cementita.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
La cementíta terciaria aparece en la estructura de los aceros hipereutectoides.
Verdadero
Falso
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En un acero al carbono, enfriado en las condiciones del diagrama Fe-Fe3C, la cementita primaria aparece cuando su composición es:
0 < %C < 0.02.
0.02 < %C < 0.77.
0.77 < %C < 4.3
%C > 4.3.
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