UPSC Civil Service Exam Questions

Q1: Which one of the following is correct in respect of the influence line for the bending moment at one-fourths of the span from left support of a prismatic beam simply supported at ends ?

A It is composed of straight lines only

B It is composed of curved lines only

C It is composed of straight and curved line

D It is parabolic

ANS:A - It is composed of straight lines only

Why can't be a parabolic and hyperbolic also?



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