Question

During the construction of earthquake-resistant buildings, it should be kept in mind that those solid concrete blocks should be used which have crushing strength not lesser than _________

(a) 10 MPa

(b) 20 MPa

(c) 35 MPa

(d) 60 MPa

This question was addressed to me in an interview for internship.

The origin of the question is Earthquake Resistant topic in chapter Earthquake Resistant Buildings of Construction & Building Materials

Answer 1

Right answer is (c) 35 MPa

The best I can explain: During the construction of earthquake-resistant buildings, it should be kept in mind that those solid concrete blocks should be used which have crushing strength not lesser than 35 MPa. However, depending on the thickness of walls and the number of storeys, masonry units of higher strength may be required.