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A commercially manufactured, vermin-proof _________ is the only type of cap designed to keep animals, insects and contaminants from entering your well.

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A commercially manufactured, vermin-proof _________ is the only type of cap designed to keep animals, insects and contaminants from entering your well.

(a) animal cap

(b) security cap

(c) danger cap

(d) well cap

I had been asked this question in an interview for job.

My enquiry is from Wells in portion Irrigation Works, Culverts, Bridges and Wells of Civil Engineering Drawing

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Correct choice is (d) well cap

The best I can explain: It comes equipped with rubber gaskets and screened vents to ensure vermin stay out and air can circulate through. Coverings for large diameter wells must be custom made because of their larger size. Ideally they should be made of steel, or fibreglass or plastic that is stamped for potable water use.

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