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Theory of Structures

Free 168+ Theory of Structures MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Practise below with answers and explanations.

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Theory of Structures — MCQs for Pakistan government job tests

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Theory of Structures

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1.Which of the following statements about loaded beams is accurate?

2.For a simply supported rectangular beam with a span of length L subjected to a concentrated load W at the center, what is the length of the elasto-plastic region forming the plastic hinge?

3.Which of the following statements about flat spiral springs is true?

4.What is the expression for the vertical reaction force of the arch?

5.In which unit is stress commonly measured in Newtons?

6.What is the horizontal displacement of a parabolic curved beam with a 10 m span and 3 m rise, subjected to a uniformly distributed load of 1 t per horizontal meter? (Here, Ic denotes the moment of inertia at the crown, which changes according to the arch's slope.)

7.Which theory describes the failure of a material at its elastic limit based on the total strain energy?

8.A steel rod with a square cross-section and length of 1 meter is subjected to a tensile force of 8 tonnes. The rod elongates by 1 mm. Given that the Young's modulus of steel (E) is 2 × 10^6 kg/cm², what is the length of one side of the rod's cross-section?

9.A steel rod measuring 5 meters in length and 50 mm in diameter is subjected to an axial load of 250,000 N. Given that the modulus of elasticity is 0.2 MN/mm² and Poisson's ratio is 0.25, what is the resulting change in the volume of the rod?

10.What is the shape factor value for a triangular cross-section in plastic analysis?

11.Which of the following statements holds true at the elastic limit of a material?

12.A cantilever beam with a length of 2 cm and a depth of 10 cm tapers in width from 24 cm at the fixed end to zero at the free end. Given that the modulus of elasticity of the material is 0.2 × 10^6 N/mm², what is the deflection at the free end?

13.A shaft experiences both a bending moment (M) and a torque (T) at the same time. What is the ratio of the maximum bending stress to the maximum shear stress in the shaft?

14.Under which condition is a material likely to fail?

15.A square column is subjected to a load P applied at the centroid of one quarter of the square cross-section. If the side length of the column is a, what is the resulting combined bending stress?

16.What is the ratio of the maximum deflection of a simply supported beam subjected to a central load W to that of a cantilever beam of the same length carrying a load W at its free end?

17.In a three-hinged arch, to find the support reactions at points A and B, points B and C are connected and extended to meet the load line at point D. Additionally, a line parallel to the load line is drawn through point A, intersecting at D'. Given the distances AD = 4 cm, DD' = 3 cm, and AD' = 5 cm, what is the angle between the reaction forces at supports A and B?

18.Which empirical formula, expressed as y/n) (1 – a l/r), is used to determine the permissible stress in long columns?

19.For a cantilever beam of length l and constant depth d designed for uniform strength, subjected to a uniformly distributed load w that starts at zero at the free end and increases along the length, what is the load intensity at the fixed support?

20.What does the point of contraflexure signify in a beam?

How to prepare with Theory of Structures MCQs

  • Work through questions topic by topic, then revisit any you answered incorrectly.
  • Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
  • Pair subject practice with past papers to see how Theory of Structures appears in real exam conditions.

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