Question

Limestone can be used as facing stones at situations where __________

(a) Air is polluted with industrial gases

(b) Along sea coasts where sea water-rich winds can attack them

(c) Less chemical exposure and mild weather

(d) The place has very harsh weather

The question was posed to me in exam.

The above asked question is from Rocks as Materials for Construction in division Engineering Properties of Rocks of Engineering Geology

Answer 1

The correct answer is (c) Less chemical exposure and mild weather

Easy explanation: Use of limestone as facing stones, even if quite strong, should be avoided in situations where- the air is polluted with industrial gases, such as in industrial towns; along sea coasts where sea-water-rich winds can attack them directly.