Q.

Which grade of stainless steel is known as acid proof steel?

A. aisi 304
B. aisi 316
C. sis 2333
D. sis 2359
Answer» B. aisi 316
Explanation: for hygienic reasons, all product-wetted parts of dairy equipment are made of stainless steel. two main grades are used, aisi 304 and aisi 316. the latter grade is often called acid proof steel.
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