Theory Of Structures — Part 2 MCQs with Explanations

Rankine's theory is the correct answer to “Maximum principal stress theory for the failure of a material at elastic point, is known”. This question is standard in competitive examination syllabi for Theory Of Structures.

Both the ends are fixed is the correct answer to “$${\text{P}} = \frac{{4{\pi ^2}{\text{E}}I}}{{{{\text{L}}^2}}}$$ is the equation of Euler's crippling load if”. This question is standard in competitive examination syllabi for Theory Of Structures.

1.10 to 1.20 is the correct answer to “The shape factor of standard rolled beam section varies from”. This question is standard in competitive examination syllabi for Theory Of Structures.

1.7 is the correct answer to “In plastic analysis, the shape factor for a circular section, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{2}{7}$$ is the correct answer to “The ratio of the deflections of the free end of a cantilever due to an isolated load at $${\frac{1}{3}^{{\text{rd}}}}$$ and $${\frac{2}{3}^{{\text{rd}}}}$$ of the span, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

2 cm is the correct answer to “A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If E steel = 2 × 10 6 kg/cm 2 , the side of the rod, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

All the above is the correct answer to “The assumption in the theory of bending of beams is:”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{{\text{W}}{{\text{L}}^3}}}{{48{\text{E}}I}}$$ is the correct answer to “The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being E$$I$$, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

All the above is the correct answer to “The horizontal thrust on the ends of a two hinged semicircular arch of radius ‘R’ carrying”. This question is standard in competitive examination syllabi for Theory Of Structures.

0.707 is the correct answer to “For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

All the above is the correct answer to “If ΣH and ΣV are the algebraic sums of the forces resolved horizontally and vertically respectively and ΣM is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon”. This question is standard in competitive examination syllabi for Theory Of Structures.

4 is the correct answer to “The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$1:1:2$$ is the correct answer to “There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of”. This question is standard in competitive examination syllabi for Theory Of Structures.

All the above is the correct answer to “Gradually applied static loads do not change with time their”. This question is standard in competitive examination syllabi for Theory Of Structures.

The outer most fibre of the section is the correct answer to “The yield moment of a cross section is defined as the moment that will just produce the yield stress in”. This question is standard in competitive examination syllabi for Theory Of Structures.

Composite beams is the correct answer to “Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as”. This question is standard in competitive examination syllabi for Theory Of Structures.

Undergoes plastic deformation is the correct answer to “At yield point of a test piece, the material”. This question is standard in competitive examination syllabi for Theory Of Structures.

Stiffness is the correct answer to “The load on a spring per unit deflection, is called”. This question is standard in competitive examination syllabi for Theory Of Structures.

611 N mm is the correct answer to “A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm 2 , the bending strain energy stored in the bar, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

5.0 mm is the correct answer to “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/mm 2 is:”. This question is standard in competitive examination syllabi for Theory Of Structures.

Width $${\text{b}} \propto {\text{M}}$$ is the correct answer to “For beams of uniform strength, if depth is constant,”. This question is standard in competitive examination syllabi for Theory Of Structures.

All the above is the correct answer to “A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised”. This question is standard in competitive examination syllabi for Theory Of Structures.

$${\sigma _{\text{b}}}$$ = 10 N/mm2, $${\sigma _{\text{s}}}$$ = 20 N/mm2 is the correct answer to “A compound bar consists of two bars of equal length. Steel bar cross-section is 3500 mm 2 and that of brass bar is 3000 mm 2 . These are subjected to a compressive load 1,00,000 N. If E b = 0.2 MN/mm 2 and E b = 0.1 MN/mm 2 , the stresses developed are:”. This question is standard in competitive examination syllabi for Theory Of Structures.

It regains its original shape on removal of the load is the correct answer to “A material is said to be perfectly elastic if”. This question is standard in competitive examination syllabi for Theory Of Structures.

All the above is the correct answer to “Pick up the correct statement from the following:”. This question is standard in competitive examination syllabi for Theory Of Structures.

Parabolic formula is the correct answer to “For calculating the allowable stress of long columns $${\sigma _0} = \frac{{{\sigma _y}}}{n}\left[ {1 - a{{\left( {\frac{1}{r}} \right)}^2}} \right]$$ is the empirical formula, known as”. This question is standard in competitive examination syllabi for Theory Of Structures.

1.5 is the correct answer to “The ratio of maximum and average shear stresses on a rectangular section, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

1.5 is the correct answer to “In plastic analysis, the shape factor for rectangular section, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

2.34 is the correct answer to “In plastic analysis, the shape factor for a triangular section, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

0.207 is the correct answer to “A simply supported beam which carries a uniformly distributed load has two equal overhangs. To have maximum B.M. produced in the beam least possible, the ratio of the length of the overhang to the total length of the beam, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{3\pi }}{{16}}$$ is the correct answer to “The ratio of the section modulus of a square section of side B and that of a circular section of diameter D, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

$${\left( {\frac{{\text{L}}}{{2{\text{d}}}}} \right)^2}$$ is the correct answer to “A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{\text{L}}}{2}$$ is the correct answer to “The equivalent length is of a column of length L, having both the ends fixed, is”. This question is standard in competitive examination syllabi for Theory Of Structures.

16 m is the correct answer to “A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be,”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{{{\text{d}}^4}{\text{N}}}}{{8{{\text{D}}^3}{\text{n}}}}$$ is the correct answer to “The stiffness of the close coil helical spring is”. This question is standard in competitive examination syllabi for Theory Of Structures.

St. Venant's theory is the correct answer to “Maximum strain theory for the failure of a material at the elastic limit, is known as”. This question is standard in competitive examination syllabi for Theory Of Structures.

None of these is the correct answer to “A body is said to be in equilibrium if”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{4{{\text{W}}^2}{{\text{D}}^3}{\text{n}}}}{{{{\text{d}}^4}{\text{N}}}}$$ is the correct answer to “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”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{\omega {l^2}}}{{16{\text{h}}}}$$ is the correct answer to “A two hinged parabolic arch of span $$l$$ and rise h carries a load varying from zero at the left end to $$\omega $$ per unit run at the right end. The horizontal thrust is”. This question is standard in competitive examination syllabi for Theory Of Structures.

$$\frac{{{\text{W}}{{\text{L}}^3}}}{{3{\text{E}}I}}$$ is the correct answer to “The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity E$$I$$, is”. This question is standard in competitive examination syllabi for Theory Of Structures.