Free Model Paper and objective test on Strength of materials

An objective test containing 25 model questions on strength of materials

1. A material obey’s Hooke’s law up to

(a) Plastic limit

(b) Elastic limit

(c) Yield point

(d) Limit of proportionality

Answer. (b)

An objective test containing 25 model questions on strength of materials

1. A material obey’s Hooke’s law up to

(a) Plastic limit

(b) Elastic limit

(c) Yield point

(d) Limit of proportionality

Answer. (b)

2. The intensity of stress which causes unit strain

is called

(a) Unit stress

(b) Modulus of rigidity

(c) Bulk modulus

(d) Modulus of elasticity

Answer. (d)

is called

(a) Unit stress

(b) Modulus of rigidity

(c) Bulk modulus

(d) Modulus of elasticity

Answer. (d)

3. Whitin elastic limit stress is

(a) Inversely proportional to strain

(b) Directly proportional to strain

(c) Square root of strain

(d) Equal to strain

Answer. (b)

(a) Inversely proportional to strain

(b) Directly proportional to strain

(c) Square root of strain

(d) Equal to strain

Answer. (b)

4. The shape of cantilever for uniformly distributed

load will be

(a) Straight line

(b) Parabolic

(c) Parabolic

(d) Elliptical

Answer. (c)

load will be

(a) Straight line

(b) Parabolic

(c) Parabolic

(d) Elliptical

Answer. (c)

5. A bar when subjected to an axial pull P

(a) Decrease in length and width and increase in

thickness

(b) Decrease in length and increase in width and

thickness

(c) Increase in length and decrease in Width and

thickness

(d) Increase in length, width and thickness.

Answer. (c)

(a) Decrease in length and width and increase in

thickness

(b) Decrease in length and increase in width and

thickness

(c) Increase in length and decrease in Width and

thickness

(d) Increase in length, width and thickness.

Answer. (c)

6. Poissons’s ratio is the ratio of

(a) Stress and strain

(b) Modules of elasticity and strain

(c) Lateral strain and longitudinal strain

(d) None of these

Answer. (c)

(a) Stress and strain

(b) Modules of elasticity and strain

(c) Lateral strain and longitudinal strain

(d) None of these

Answer. (c)

7. A coil is cut into two halves, the stiffness of cut

coils will be

(a) Double

(b) Half

(c) Same

(d) None of these

Answer. (a)

coils will be

(a) Double

(b) Half

(c) Same

(d) None of these

Answer. (a)

8. If the radius of wire streched by a load is doubled,

then its Young’s modulus will

(a) Be doubled

(b) Be halved

(c) Become four times

(d) None of these

Answer. (d)

then its Young’s modulus will

(a) Be doubled

(b) Be halved

(c) Become four times

(d) None of these

Answer. (d)

9. Principal planes are planes having

(a) Maximum shear stress

(b) No shear stress

(c) Minimum shear stress

(d) None of the above

Answer. (a)

(a) Maximum shear stress

(b) No shear stress

(c) Minimum shear stress

(d) None of the above

Answer. (a)

10. Euler’s crippling load formula is valid for a columns having slenderless ratio (in terms

of effective length and minimum radius of gyration)

(a) Upto 12

(b) Upto 30

(c) Between 30 to 80

(d) Above 80 only

Answer. (d)

of effective length and minimum radius of gyration)

(a) Upto 12

(b) Upto 30

(c) Between 30 to 80

(d) Above 80 only

Answer. (d)

11. At the principal planes

(a) Normal stress is maximum or minimum and the

shear stress is zero

(b) Tensile and compressive stresses are zero

(c) Tensile stress is zero and the shear stress is

maximum.

(d) No stress acts

Answer. (a)

(a) Normal stress is maximum or minimum and the

shear stress is zero

(b) Tensile and compressive stresses are zero

(c) Tensile stress is zero and the shear stress is

maximum.

(d) No stress acts

Answer. (a)

12. A cylindrical section having no joint is known as

(a) Jointless section

(b) Homogeneous section

(c) Perfect section

(d) Seamless section

Answer. (d)

(a) Jointless section

(b) Homogeneous section

(c) Perfect section

(d) Seamless section

Answer. (d)

13. Slope and deflection at a point in a loaded cantilever beam carrying several loads can be

found out by the

(a) Principle of least work

(b) Moment area method

(c) Double integration method

(d) Macualay’s method

Answer. (d)

found out by the

(a) Principle of least work

(b) Moment area method

(c) Double integration method

(d) Macualay’s method

Answer. (d)

14. A composite bar made of steel and copper is heated up. The stresses developed in steel and

copper will be

(a) Compressive and tensile

(b) Compressive and bending

(c) Bending and tensile

(d) Tensile and compressive

Answer. (d)

copper will be

(a) Compressive and tensile

(b) Compressive and bending

(c) Bending and tensile

(d) Tensile and compressive

Answer. (d)

15 . The factor of safety considered in Euler’s formula for crippling load is

(a) 1

(b) 3

(c) 5

(d) 6

Answer. (a)

(a) 1

(b) 3

(c) 5

(d) 6

Answer. (a)

16. In I-section, the bending moment is resisted

mainly by

(a) Flanges only

(b) Web only

(c) Both by flanges and web

(d) None of the above

Answer. (b)

mainly by

(a) Flanges only

(b) Web only

(c) Both by flanges and web

(d) None of the above

Answer. (b)

17. The rate of change of shear force at any section

is equal to

(a) Bending moment

(b) Loading

(c) Deflection

(d) Intensity of loading

Answer. (d)

is equal to

(a) Bending moment

(b) Loading

(c) Deflection

(d) Intensity of loading

Answer. (d)

18. If the depth of a rectangular beam is halved

the deflection for a beam carrying a mid point

load shall be

(a) Halved

(b) Doubled

(c) Four times

(d) Eight times

Answer. (d)

the deflection for a beam carrying a mid point

load shall be

(a) Halved

(b) Doubled

(c) Four times

(d) Eight times

Answer. (d)

19. Beams of uniform strength are better as

comapred to beams of uniform cross section as

they are Economical

(a) For short spans

(b) For large spans

(c) For heavy weight beams

(d) For light weight beams

Answer. (b)

comapred to beams of uniform cross section as

they are Economical

(a) For short spans

(b) For large spans

(c) For heavy weight beams

(d) For light weight beams

Answer. (b)

20. A point of contraflexure occurs in a

(a) Simply supported beam

(b) Fixed beam

(c) Cantilever

(d) None of the above

Answer. (b)

(a) Simply supported beam

(b) Fixed beam

(c) Cantilever

(d) None of the above

Answer. (b)

21. Shear force diagram for a cantilever beam

carrying a uniformly distributed load over its

length is a

(a) Triangle

(b) Rectangle

(c) Hyperbola

(d) Parabola

Answer. (a)

carrying a uniformly distributed load over its

length is a

(a) Triangle

(b) Rectangle

(c) Hyperbola

(d) Parabola

Answer. (a)

22. Shear stress in a rectangular beam exhibits a

(a) Parabolic variation

(b) Linear variation

(c) Cubic variation

(d) None of the above

Answer. (a)

(a) Parabolic variation

(b) Linear variation

(c) Cubic variation

(d) None of the above

Answer. (a)

23. In T-section

(a) Both flange and web resists in the ratio of the

their areas of cross-section

(b) Only flanges resists shear

(c) Most of the shear is resisted by web only

(d) None of these

Answer. (c)

(a) Both flange and web resists in the ratio of the

their areas of cross-section

(b) Only flanges resists shear

(c) Most of the shear is resisted by web only

(d) None of these

Answer. (c)

24. Mohr’s circle can be used to determine following

stress on inclined surface

(a) Principal stress

(b) Normal stress

(c) Tangential stress

(d) Maximum shear stress

(e) All of the above

Answer. (c)

stress on inclined surface

(a) Principal stress

(b) Normal stress

(c) Tangential stress

(d) Maximum shear stress

(e) All of the above

Answer. (c)

25. A riveted joint in which the spacing of the rivets

is staggered in such a way that every rivet is in

the middle of the two rivets of the opposite row,

is known as

(a) Zig-zag riveted joint

(b) Diamond riveted joint

(c) Butt riveted joint

(d) Chain riveted joint

Answer. (a)

is staggered in such a way that every rivet is in

the middle of the two rivets of the opposite row,

is known as

(a) Zig-zag riveted joint

(b) Diamond riveted joint

(c) Butt riveted joint

(d) Chain riveted joint

Answer. (a)

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