Materials and Construction
Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysterisis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%)?

Induction motors
Armature of small motors/generators
High frequency transformers
Generators and small motors

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Materials and Construction
Mild steel is

Very poor in strength & ductility
A low carbon steel (0.05 to 0.3% carbon)
A high carbon steel (0.5 to 1.5% carbon)
Highly resistant to corrosion (as much as stainless steel)

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