Theory of Structures Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ Theory of Structures ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate Theory of Structures comprehensively.

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1.
The force in BC of the truss shown in the given figure, is___________________?

3.0 t compression

3.0 t tension

T tension

T compression

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3.
A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?

2/3

3/2

5/8

8/5

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4.
In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is_________________?

L/2

L/3

L/4

L/5

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5.
If Ix and Iy are the moments of inertia of a section about X and Y axes, the polar moment of inertia of the section, is_________________?

(IX + IY)/2

(IX – IY)/2

IX + IY

(I /I )

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6.
If E, N, K and 1/m are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good_______________?

E = 3K (1 – 2/m)

E = 2N (1 + 1/m)

(3/2)K (1 – 2/m) = N (1 + 1/m)

All the above

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7.
Gradually applied static loads do not change with time their_______________?

Magnitude

Direction

Point of application

All the above

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8.
A body is said to be in equilibrium if___________________?

It moves horizontally

It moves vertically

It rotates about its C.G.

None of these

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9.
The forces acting normally on the cross section of a bar shown in the given figure introduce_____________?

Compressive stress

Tensile stress

Shear stress

None of these

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10.
The load on a spring per unit deflection, is called______________?

Stiffness

Proof resilience

Proof stress

Proof load

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11.
A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is______________?

4WD²n/d4N

4W²Dn/d4N

4W²D3n/d4N

4W²D3n²/d4N

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12.
The moment of inertia of a triangular section (height h, base b) about its base, is_______________?

Bh²/12

B²h/12

Bh3/12

B3h/12

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13.
The assumption in the theory of bending of beams is_________________?

Material is homogeneous

Material is isotropic

Young’s modulus is same in tension as well as in compression

All the above

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14.
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______________?

/6

/2

/3

/4

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15.
A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is________________?

4.0 mm

4.5 mm

5.0 mm

5.5 mm

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