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### Civil Engineering :: Theory of Structures

1. The assumption in the theory of bending of beams, is :

2.  A. material is homogeneous B. material is isotropic C. Young's modulus is same in tension as well as in compression D. each layer is independent to expand or to contract E. all the above.

3. The shape factor of standard rolled beam section varies from

4.  A. 1.10 to 1.20 B. 1.20 to 1.30 C. 1.30 to 1.40 D. 1.40 to 1.50

5. Shear strain energy theory for the failure of a material at elastic limit, is due to

6.  A. Rankine B. Guest or Trecas C. St. Venant D. Haig E. Von Mises.

7. The point of contraflexure is the point where

8. A.
 B.M. changes sign
B.

B.M. is maximum

C.

B.M. is minimum

D.

S.F. is zero.

9. The normal component of a force inclined through Î¸° is obtained by multiplying the force by

10. A.

sin θ

B.

cos θ

C.
 tan θ
D.
 sin θ cos θ
E.
 sin2θ

11. A material which obeys Hook's law, is subjected to direct stress ÃÆ’0. At its elastic limit, the following statement is true,

12.  A.           Strain is equal to$$\frac { \sigma0 } { E }$$ B. Maximum shear stress = $$\frac { \sigma0 } { 2 }$$ C. Strain energy =$$\frac { \sigma0 ^2} { 2 E}$$X volume D. Shear strain energy =$$\frac { \sigma0 } { 6N }$$ x volume

13.

 In the truss shown in the given figure, the force in member BC is
14. A.

100 t compressive

B.
 100 t tensile
C.

zero

D.

indeterminate

15. A concentrated load P is supported by the free end of a quadrantal ring AB whose end B is fixed. The ratio of the vertical to horizontal deflections of the end A, is

16.  A. π B. $$\frac { n } { 2 }$$ C. $$\frac { n } { 3}$$ D. $$\frac { n } { 4}$$

17. Stress may be defined as

18.  A. force per unit length B. force per unit volume C. force per unit area D. none of these.

19. Total strain energy theory for the failure of a material at elastic limit, is known

20.  A. Guest's or Trecas' theory B. St. Venant's theory C. Rankine's theory D. Haig's theory E. Von Mises's theory.