Aluminized valves are never ground; they have to be replaced because Aluminized valves are never ground they have to be replaced because mcq is given below:

Q. Aluminized valves are never ground, they have to be replaced because

(a) aluminium is a costly material
(b) aluminium surface is difficult to be ground
(c) grinding such valves will make them corrosion prone
(d) none of these.

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Ans:  (c) grinding such valves will make them corrosion prone 

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