Structural Analysis
Muller Breslau’s principle for obtaining influence lines is applicable to i) trusses ii) statically determinate beams and frames iii) statically indeterminate structures, the material of which is elastic and follows Hooke’s law iv) any statically indeterminate structure The correct answer is

only (i)
(i), (ii) and (iii)
(i), (ii) and (iv)
(i) and (ii)

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Structural Analysis
When a uniformly distributed load, shorter than the span of the girder, moves from left to right, then the conditions for maximum bending moment at a section is that

the tail of the load reaches the section
the load position should be such that the section divides it equally on both sides
the head of the load reaches the section
the load position should be such that the section divides the load in the same ratio as it divides the span

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