Question

__________ is a metamorphic rock with specific gravity about 2.89 and compressive strength varies from 75 to 207 Newton per mm square.

(a) Quartzite

(b) Murum

(c) Marble

(d) Slate

I had been asked this question in an online interview.

This interesting question is from Common Building Stones of India topic in division Stone and Brick Masonry of Construction & Building Materials

Answer 1

Correct option is (d) Slate

The explanation is: Slate is non-absorbent, mostly in black colour and splits along natural bedding planes. It is used in damp proof courses, roofing work, sills, etc. Mostly found in Uttar Pradesh, Madhya Pradesh, Bihar, Madras and Mysore.