#### Strenght of Materials

46

The maximum deflection of a fixed beam of length l carrying a central point load W is

A. (Wl^3)/(48El)
B. (Wl^3)/(96El)
C. (Wl^3)/(192El)
D. (Wl^3)/(384El)

47

The polar moment of inertia of a solid circular shaft of diameter (D) is

A. (pi D^3)/(16)
B. (pi D^3)/(32)
C. (pi D^4)/(32
D. (pi D^4)/(64)

48

The relation between Young's modulus (E), shear modulus (C) and bulk modulus (K) is given by

A. E = (3KC)/(3K + C)
B. E = (6KC)/(3K + C)
C. E = (9KC)/(3K + C)
D. E = (12KC)/(3K + C)

49

When a bar of length l and diameter d is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)

A. (Wl)/(2E)
B. (Wl^2)/(2E)
C. (Wl^3)/(2E)
D. (Wl^4)/(2E)

50

The pull required to crush the rivet per pitch length is

A. p.t.sigma_t
B. d.t.sigma_c
C. pi//4 xx d^2 xx sigma_t
D. pi//4 xx d^2 xx sigma_c