Plastic asphalt is A. Used as a water proofing layer over roof B. A mixture of cement and asphalt C. A natural asphalt D. A refinery product

Used as a water proofing layer over roof
A mixture of cement and asphalt
A natural asphalt
A refinery product

The correct answer is: D. A refinery product

Plastic asphalt is a refinery product that is made from crude oil. It is a black, sticky substance that is used in a variety of applications, including road construction, roofing, and waterproofing.

Option A is incorrect because plastic asphalt is not used as a water proofing layer over roof. This is typically done with a different material, such as roofing felt or membrane.

Option B is incorrect because plastic asphalt is not a mixture of cement and asphalt. Cement is a powder that is used to make concrete, while asphalt is a sticky substance that is used in road construction.

Option C

is incorrect because plastic asphalt is not a natural asphalt. Natural asphalt is a substance that is found in the earth, while plastic asphalt is a man-made product.