Question

Crushing strength should be greater than ___________ for a good structural stone.

(a) 10 kg per cm^2

(b) 100 kg per cm^2

(c) 1000 kg per cm^2

(d) 10,000 kg per cm^2

Answer 1

Correct choice is (c) 1000 kg per cm^2

For explanation I would say: Crushing strength should be greater than 1000 kg per cm^2 for a good structural stone. Crushing strength of basalt is as large as 1500 to 1900 kg per cm^2 while that of limestone and sandstone is 550 and 650 kg per cm^2 respectively.