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Which of the below preservative, with their examples correctly match?(a) Type 1 – DDT(b) Type 2 – Coal(c) Type 3 – Boric acid(d) Type 4 – Benzene |
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Answer» The correct answer is (c) Type 3 – Boric acid The explanation: There are only 3 types of preservative as per IS 401. Type 1 is oil type and coal, tar are examples of it. Type 2 is an organic solvent type with benzene, DDT as examples. Type 3 is water borne type and boric acid, zinc chloride are examples of it. |
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