Question

Bulk density of the silica fume varies from ____________

(a) 130-600 kg/m^3

(b) 650 kg/mm^3

(c) 75-150 kg/mm^3

(d) 750 kg/mm^3

I have been asked this question in an interview for internship.

My doubt is from Silica Fume topic in division Admixtures and Construction Chemicals of Concrete Technology

Answer 1

Correct answer is (a) 130-600 kg/m^3

To elaborate: The bulk density of silica fume depends on the degree of densification in the silo and varies from 130 (undensified) to 600 kg/m^3.