DPC _________ effective used in concretes that are in contact

dpc-effective-used-in-concretes-that-are-in-contact

DPC _________ effective used in concretes that are in contact with water under pressure.

A. Does

B. Doesn’t

C. Doesn’t effect

D. Depends on the temperature

I had been asked this question in my homework.

Asked question is from Damp Proofing Admixtures topic in division Admixtures and Construction Chemicals of Concrete Technology

Right answer is B. Doesn’t

Explanation: Many so-called damp proofers are not effective, especially when used in concretes that are in contact with water under pressure.