Which among the following type is named when the silicon content is 12% in an aluminum alloy?(a) Eutectic(b) Hyper-eutectic(c) Hypo-eutectic(d) PearliteI got this question in exam.My query is from Engine Components in division Basic Engine Components of Automotive Engine Design

Which among the following type is named when the silicon content is 12

1.	Which among the following type is named when the silicon content is 12% in an aluminum alloy?(a) Eutectic(b) Hyper-eutectic(c) Hypo-eutectic(d) PearliteI got this question in exam.My query is from Engine Components in division Basic Engine Components of Automotive Engine Design
Answer» CORRECT OPTION is (a) Eutectic To elaborate: Aluminum alloy containing silicon when increased leads to a DECREASE in its coefficient of expansion. Presently TWO alloy with silicon content 12%(eutectic) and 22% (hyper-eutectic) are being used, which have less coefficient of expansion to that of aluminum.

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Which among the following type is named when the silicon content is 12% in an aluminum alloy?(a) Eutectic(b) Hyper-eutectic(c) Hypo-eutectic(d) PearliteI got this question in exam.My query is from Engine Components in division Basic Engine Components of Automotive Engine Design

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