Mechanical Engineering - Engineering Materials

26.
Tungsten when added to steel __________ the critical temperature.
does not effect
lowers
raises
Answer: Option
Explanation:
No answer description is available. Let's discuss.

27.
Silicon when added to copper improves
machinability
hardness
hardness and strength
strength and ductility
Answer: Option
Explanation:
No answer description is available. Let's discuss.

28.
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
chromium
nickel
vanadium
cobalt
Answer: Option
Explanation:
No answer description is available. Let's discuss.

29.
Cast iron is manufactured in
blast furnace
cupola
open hearth furnace
bessemer converter
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
The lower critical point for all steels is
600°C
700°C
723°C
913°C
Answer: Option
Explanation:
No answer description is available. Let's discuss.