Question

An aim of the foundation designer should be such that the frequency ratio f/fn is either less than _________

(a) 1.5

(b) 0.6

(c) 2.0

(d) 3.4

The question was posed to me in homework.

This is a very interesting question from Machine Foundations topic in portion Machine Foundations of Geotechnical Engineering II

Answer 1

Right choice is (b) 0.6

For explanation I would say: The aim of the designer should be such that the frequency ratio f/fn is either less than 0.6 or more than 1.5 by suitably proportioning it.