# MOS/Imp questions on Solid mechanics for civil or mechanical engineering aspirants-Part 04

1) The point of contraflexture occurs in

A. cantilever beams only

B. continuous beams only

C. over hanging beams only

D. all types of beams

E. both (a) and (b).

2) A member which is subjected to reversible tensile or compressive stress may fail at a stress lower than the ultimate stress of the material. This property of metal, is called

A. plasticity of the metal

B. elasticity of the metal

C. fatigue of the metal

D. work ability of the metal.

3) The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as

A. yield stress

B. longitudinal stress

C. hoop stress

D. circumferential stress

E. ultimate stress.

4) In a simply supported beam (l + 2a) with equal overhangs (a) and carrying a uniformly distributed load over its entire length, B.M. at the middle point of the beam will be zero if

A. l = 2a

B. l = 4a

C. l < 2a

D. l > a

E. l > 3a.

5) Rankine-Golden formula accounts for direct as well as buckling stress and is applicable to

A. very long columns

B. long columns

C. short columns

D. intermediate columns

E. all the above.

6) During a tensile test on a ductile material

A. nominal stress at fracture is higher than the ultimate stress

B. true stress at fracture is higher than the ultimate stress

C. true stress at fracture is the same as the ultimate stress

D. none of these.

7) At either end of a plane frame, maximum number of possible bending moments, are

A. one

B. two

C. three

D. four

E. zero.

8) In a three hinged arch, the bending moment will be zero

A. at right hinge only

B. at left hinge only

C. at both right and left hinges

D. at all the three hinges.

9) The ratio of the tensile stress developed in the wall of a boiler in the circumferential direction to the tensile stress in the axial direction, is

A. 4

B. 3

C. 2

D. 1

10) In a shaft shear stress intensity at a point is not

A. directly proportional to the distance from the axis

B. inversely proportional to the distance from the axis

C. inversely proportional to the polar moment of inertia

D. directly proportional to the applied torque.

11) Along the neutral axis of a simply supported beam

A. fibers do not undergo strain

B. fibers undergo minimum strain

C. fibers undergo maximum strain

D. none of these.

12) A joint of a frame is subjected to three tensile force P, Q and R equally inclined to each other. If P is 10 tonnes, the other forces will be

A. Q = 10 tonnes and R = zero

B. R + 10 tonnes and Q = zero

C. Q + R = 10 tonnes

D. Q - R = zero

E. Q and R each is equal to 10 tonnes.

13) Pick up the correct statement from the following :

A. The distance of the eccentric axial load from the C.G. beyond which tension develops, is known as Kern distance

B. In visco-elastic material, stress-strain relation is dependent on time

C. An ins-tropic material has different properties is different directions

D. An orthopedic material has different properties in three mutually perpendicular directions

E. All the above.

14) Along the principal plan subjected to maximum principal stress

A. maximum shear stress acts

B. minimum shear stress acts

C. no shear stress acts

D. none of these.

15) A diagram which shows the variations of the axial load for all sections of the span of a beam, is called

A. bending moment diagram

B. shear force diagram

C. thrust diagram

D. stress diagram

E. none of these.

16) A member which does not regain its original shape after removed of load producing deformation is said

A. plastic

B. elastic

C. rigid

D. none of these.