#### Strenght of Materials

1

The resultant stress on an inclined plane which is inclined at an angle theta to the normal cross-section of a body which is subjected to a direct tensile stress (sigma) in one plane, is

A. sigma sin theta
B. sigma cos theta
C. sigma sin 2theta
D. sigma cos 2 theta

2
If the depth is kept constant for a beam of uniform strength, then its width will vary in proportional to (where M = Bending moment)
A. M
B. sqrt(M)
C. M^2
D. M^3

3

The unit of stress in S.I. units is

A. N//mm^2
B. KN//mm^2
C. N//m^2
D. any one of these

4
The strain energy stored in a body due to shear stress, is (where tau= Shear stress, C = Shear modulus, and V = Volume of the body)

A. (tau)/(2C) xx V
B. (2C)/(tau V)
C. (tau^2)/(2C) xx V
D. (2C)/(tau^2 V)

5
In leaf springs, the maximum bending stress developed in the plates is (where W = Load acting on the spring, l = Span of the spring, n = Number of plates, b = Width of plates, and t = Thickness of plates)
A. (Wl)/(nbt^2)
B. (3Wl)/(2nbt^2)
C. (2Wl)/(nbt^2)
D. (3Wl)/(nbt^2)