Soap kettle used in the production of laundry soap is made of____________________?
Correct answer: D. Steel with top section nickel clad or stainless steel
- A. Concrete
- B. Cast iron
- C. Nickel
- D. Steel with top section nickel clad or stainless steel
Explanation
A soap kettle handles hot, corrosive alkaline liquor, so its body is commonly steel with the upper or most exposed section nickel-clad or made from stainless steel. Cast iron and concrete do not provide the required combination of strength and corrosion resistance.
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