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strength of materials mechanical engineering MCQs

Practise focused strength of materials mechanical engineering questions with marked answers for exam preparation and subject revision.

strength of materials mechanical engineering Mcqs

1. Youngs modulus is defined as the ratio of ___________________?
0

A. longitudinal stress and lateral strain

B. longitudinal stress and longitudinal strain

C. shear stress to shear strain

D. lateral stress and lateral strain

E. volumetric stress and volumetric strain

2. Which is the false statement about true stress-strain method______________?
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A. It does not exist

B. It is more sensitive to changes in both metallurgical and mechanical conditions

C. It gives, a more accurate picture of the ductility

D. It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc.

E. It can be used for compression tests as well.

3. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?
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A. all the above are correct

B. be all parallel

C. meet in a point

D. none of the above

E. at least two of them must meet

4. Diamond riveted joint can be adopted in the case of following type of joint _____________________?
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A. double riveted lap joints

B. butt joint

C. none of the above

D. lap joint

E. all types of joints

5. The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is_______________?
0

A. one-fourth

B. four times

C. half

D. double

E. same

6. Which of the following has no unit __________________?
0

A. bulk modulus

B. surface tension

C. strain

D. elasticity

E. kinematic viscosity

7. The stress induced in a body due to suddenly applied load compared to when it is applied gradually is________________?
0

A. none of the above

B. two times

C. same

D. four times

E. half

8. The buckling load for a given material depends on___________________?
0

A. Poissons ratio and modulus of elasticity

B. slenderness ratio, area of cross-section and modulus of elasticity

C. slenderness ratio and area of cross-section

D. Poissons ratio and slenderness ratio

E. slenderness ratio and modulus of elasticity

9. If a material expands freely due to heating it will develop ____________________?
0

A. bending

B. no stress

C. thermal stresses

D. tensile stress

E. compressive stress

10. Deformation per unit length in the direction of force is known as_________________?
0

A. lateral strain

B. linear stress

C. unit strain

D. strain

E. linear strain

11. In a tensile test, near the elastic limit zone, the______________?
0

A. tensile strain increases in proportion to the stress

B. tensile strain decreases in proportion to the stress

C. tensile strain remains constant

D. tensile strain decreases more quickly

E. tensile strain increases more quickly

12. The maximum frictional force which comes into play when a body just begins to slide over another surface is called________________?
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A. dynamic friction

B. limiting friction

C. sliding friction

D. kinematic friction

E. rolling friction

13. In actual machines_____________________?
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A. mechanical advantage is equal to velocity ratio

B. mechanical advantage is unity

C. none of the above

D. mechanical advantage is less than velocity ratio

E. mechanical advantage is greater than velocity ratio

14. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called____________________?
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A. malleability

B. resilience

C. ductility

D. plasticity

E. elasticity

15. The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight________________?
0

A. of same magnitude as that of bar and applied at the lower end

B. half the weight of bar applied at lower end

C. one-fourth of weight of bar applied at lower end

D. none of the above

E. half of the square of weight of bar applied at lower end

16. The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to___________________?
0

A. modulus of rigidity

B. modulus of elasticity

C. Poissons ratio

D. Youngs modulus

E. bulk modulus

17. Rivets are made of following type of material_________________?
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A. hard

B. malleable

C. tough

D. resilient

E. ductile

18. The distance between the centres of the rivets in adjacent rows of zig-zag riveted joint is known as ____________________?
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A. back pitch

B. diagonal pitch

C. diametral pitch

D. pitch

E. lap

19. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is________________?
0

A. half

B. one fourth

C. same

D. double

E. four times

20. In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the_________________?
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A. smaller of the two

B. size of rivet

C. average of size of rivet and hole

D. size of the drilled or reamed hole

E. any one of the above

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