Strength of materials1.Strain energy is the

A.energy stored in a body when strained within elastic limits

B.energy stored in a body when strained upto the breaking of a specimen

C.maximum strain energy which can be stored in a body

D.proof resilience per unit volume of a material

2.A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the

A.axis of load

B.perpendicular to the axis of load

C.maximum moment of inertia

D.minimum moment of inertia

3. A heavy uniform rod of length 'L' and material density '' is hung vertically with its top end rigidly fixed. How is the total elongation of the bar under its own weight expressed?(a)2 L2 g(b) L2 g(c) L2 g(d) L2 g

EE2E2E

4. The deformation of a bar under its own weight as compared to that when subjected toa direct axial load equal to its own weight will be

(a) the same(b) one-fourth(c) half(d) double

5. A solid uniform metal bar of diameter D and length L is hanging vertically from its upper end. The elongation of the bar due to self weight is: ](a) Proportional to L and inversely proportional to D2

(b) Proportional to L2 and inversely proportional to D2 (c) Proportional of L but independent of D (d) Proportional of U but independent of D

6. If the value of Poisson's ratio is zero, then it means that

(a) the material is rigid.(b) the material is perfectly plastic.

(c) there is no longitudinal strain in the material (d) the longitudinal strain in the material is infinite. 7. Which of the following is true (= Poisson's ratio)(a) 0 <