## Theory of Structures A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is

(1 – g/f)/A
[W (2 + g/f)]/A
[W (2 + f/G)]/A
[W (1 + f/ G)]/ A

## Theory of Structures At any point of a beam, the section modulus may be obtained by dividing the moment of inertia of the section by

Depth of the section
Maximum tensile stress at the section
Maximum compressive stress at the section
Depth of the neutral axis

## Theory of Structures The general expression for the B.M. of a beam of length l is the beam carries M = (wl/2) x – (wx²/2)

A uniformly distributed load w/unit length
A load varying linearly from zero at one end to w at the other end
An isolated load at mid span
None of these

150 N/mm²
120 N/mm²
80 N/mm²
100 N/mm 2

## Theory of Structures Flat spiral springs

Consist of uniform thin strips
Are wound by applying a torque
All of these
Consist of uniform thin strips

## Theory of Structures Pick up the correct statement from the following:

In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
All of these
In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
In a loaded beam, the moment at which the first yield occurs is called yield moment