Imp questions on Solid mechanics for civil or mechanical engineering aspirants Part 06-2020

 1) Columns of given length, cross-section and material have different values of buckling loads for different end conditions. The strongest column is one whose

A. one end is fixed and other end is hinged

B. both ends are hinged or pin jointed

C. one end is fixed and the other end entirely free

D. both the ends are fixed

E. none of the these.

Answer: D

2) As the elastic limit reaches, tensile strain

A. increases more rapidly

B. decreases more rapidly

C. increases in proportion to the stress

D. decreases in proportion to the stress.

Answer: A

3) Babulu: Every material obeys the Hooke's law within its

A. elastic limit

B. plastic point

C. limit of proportionality

D. none of these.

Answer: C

4) Beams of uniform strength are preferred to those of uniform section because these are economical for

A. large spans

B. heavy weights

C. light weights

D. short spans.

Answer: A

5) The moment diagram for a cantilever whose free end is subjected to a bending moment, will be a

A. triangle

B. rectangle

C. parabola

D. cubic parabola.

Answer: B

6) Reactions at the supports of a structure can be determined by equating the algebraic sum of

A. horizontal forces to zero

B. vertical forces to zero

C. moment about any point to zero

D. all the above.

Answer: D

7) Shear force for a cantilever carrying a uniformly distributed load over its length, is

A. triangle

B. rectangle

C. parabola

D. cubic parabola.

Answer: A

8) If the width of a simply supported beam carrying an isolated load at its center is doubled, the deflection of the beam at the centre is changed by

A. 2 times

B. 4 times

C. 8 times

D. 1/2 times

E. 3 times.


9) For a stable frame structure, number of members required, is

A. three times the number of joints minus three

B. twice the number of joints minus three

C. twice the number of joints minus two

D. twice the number of joints minus one

E. none of these.

Answer: B

10) Babulu: When a rectangular beam is loaded transversely, the maximum compressive stress develops on

A. bottom fibre

B. top fibre

C. neutral axis

D. every cross-section.

Answer B

11) In a continuous bending moment curve the point where it changes sign, is called

A. point of inflexion

B. point of contraflexture

C. point of virtual hinge

D. all the above.

Answer: D

12) A beam of length L supported on two intermediate rollers carries a uniformly distributed load on its entire length. If sagging B.M. and hogging B.M. of the beam are equal, the length of each overhang, is

A. 0.107 L

B. 0.207 L

C. 0.307 L

D. 0.407 L

E. 0.5 L.


13) A long vertical member, subjected to an axial compressive load, is called

A. a column

B. a strut

C. a tie

D. a stanchion

E. all the above.

Answer: A

14) The property by which a body returns to its original shape after removal of the force, is called

A. plasticity

B. elasticity

C. ductility

D. malleability.

Answer: B

15) If the stress produced by a prismatic bar is equal to the working stress, the area of the cross-section of the prismatic bar, becomes

A. zero

B. infinite

C. maximum

D. minimum.

Answer: B

16) The section modulus of a rectangular section is proportional to

A. area of the section

B. square of the area of the section

C. product of the area and depth

D. product of the area and width

E. half moment of inertia of the section.

Answer: A

17) The property of a material by which it can be drawn to a smaller section, due to tension, is called

A. plasticity

B. ductility

C. elasticity

D. malleability.

Answer:  B

18) The distance between the centers of adjacent rivets in the same row, is called

A. pitch

B. lap

C. gauge

D. staggered pitch.

Answer: A

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