Question

In attrition test used to find the rate of wear of stones, wear should be equal to or less than ___________ for good building stone.

(a) 2%

(b) 3%

(c) 5%

(d) 6%

I had been asked this question during an interview for a job.

I want to ask this question from Stones topic in portion Air Conditioning, Thermal Insulation, Stones & Ferrous Metals of Construction & Building Materials

Answer 1

Right answer is (a) 2%

To explain I would say: In attrition test used to find the rate of wear of stones, wear should be equal to or less than 2 % for good building stone. If the wear is more than 3%, then the stone is not satisfactory.