Theory Of Structures MCQ Questions & Answers

11

Shear strain energy theory for the failure of a material at elastic limit, is due to

A) Rankine B) Guest or Trecas C) St. Venant D) Von Mises

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Answer & Solution

Answer: Option D

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12

The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is

A) $$\frac{{\text{F}}}{{\text{A}}}$$ B) $$\frac{{\text{F}}}{{2{\text{A}}}}$$ C) $$\frac{{3{\text{F}}}}{{2{\text{A}}}}$$ D) $$\frac{{2{\text{F}}}}{{3{\text{A}}}}$$

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Answer & Solution

Answer: Option C

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13

A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the value of E = 0.2 × 10⁶ N/mm², the depth of the joist, is

A) 200 mm B) 250 mm C) 300 mm D) 400 mm

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Answer & Solution

Answer: Option D

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14

A short column (30 cm × 20 cm) carries a load P₁ at 4 cm on one side and another load P₂ at 8 cm on the other side along a principal section parallel to longer dimension. If the extreme intensity on either side is same, the ratio of P₁ to P₂ will be

A) $$\frac{2}{3}$$ B) $$\frac{3}{2}$$ C) $$\frac{8}{5}$$ D) $$\frac{5}{8}$$

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Answer & Solution

Answer: Option C

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15

A compound truss may be formed by connecting two simple rigid frames, by

A) Two bars B) Three bars C) Three parallel bars D) Three bars intersecting at a point

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Answer & Solution

Answer: Option B

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16

If a three hinged parabolic arch, (span $$l$$, rise h) is carrying a uniformly distributed load w/unit length over the entire span,

A) Horizontal thrust is $$\frac{{{\text{w}}{l^2}}}{{8{\text{h}}}}$$ B) S.F. will be zero throughout C) B.M. will be zero throughout D) All the above

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Answer & Solution

Answer: Option D

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17

Keeping breadth constant, depth of a cantilever of length $$l$$ of uniform strength loaded with uniformly distributed load w varies from zero at the free end and

A) $$\frac{{2{\text{w}}}}{{\sigma {\text{b}}}} \times l{\text{ at the fixed end}}$$ B) $$\sqrt {\frac{{3{\text{w}}}}{{\sigma {\text{b}}}} \times l} {\text{ at the fixed end}}$$ C) $$\sqrt {\frac{{2{\text{w}}}}{{\sigma {\text{b}}}} \times l} {\text{ at the fixed end}}$$ D) $$\frac{{3{\text{w}}}}{{\sigma {\text{b}}}} \times l{\text{ at the fixed end}}$$

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Answer & Solution

Answer: Option B

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18

A cantilever of length ‘L’ is subjected to a bending moment ‘M’ at its free end. If E$$I$$ is the flexural rigidity of the section, the deflection of the free end, is

A) $$\frac{{{\text{ML}}}}{{{\text{E}}I}}$$ B) $$\frac{{{\text{ML}}}}{{2{\text{E}}I}}$$ C) $$\frac{{{\text{M}}{{\text{L}}^2}}}{{2{\text{E}}I}}$$ D) $$\frac{{{\text{M}}{{\text{L}}^2}}}{{3{\text{E}}I}}$$

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Answer & Solution

Answer: Option D

Solution:

$$\left(\frac{2}{3}\right)^3$$

19

A cantilever of length 2 cm and depth 10 cm tapers in plan from a width 24 cm to zero at its free end. If the modulus of elasticity of the material is 0.2 × 10⁶ N/mm², the deflection of the free end, is

A) 2 mm B) 3 mm C) 4 mm D) 5 mm

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Answer & Solution

Answer: Option D

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20

In the truss, the force in the member AC is

A) 6.25 t compressive B) 8.75 t tensile C) t tensile D) t compressive

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Answer & Solution

Answer: Option D

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Theory Of Structures MCQ Questions & Answers | Civil Engineering