Exercise: Engineering Materials

Questions for: Engineering Materials

Haematite iron ore contains iron about
A:
30%
B:
45%
C:
55%
D:
70%
Answer: D
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The lower critical point for all steels is
A:
600°C
B:
700°C
C:
723°C
D:
913°C
Answer: C
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Cast iron is manufactured in
A:
blast furnace
B:
cupola
C:
open hearth furnace
D:
bessemer converter
Answer: B
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The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
A:
chromium
B:
nickel
C:
vanadium
D:
cobalt
Answer: D
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Silicon when added to copper improves
A:
machinability
B:
hardness
C:
hardness and strength
D:
strength and ductility
Answer: C
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