Theory of Structures Online Test – Multiple Choice Questions and Answers 1. Maximum strain theory for the failure of a material at the elastic limit, is known as Rankine’s theory St. Venant’s theory Guest’s or Trecas’ theory Haig’s theory 2. 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/mm2, the bending strain energy stored in the bar, is 411 N mm 511 N mm 611 N mm 711 N mm 3. In case of principal axes of a section sum of moment of inertia is zero difference of moment inertia is zero product of moment of inertia is zero none of these 4. A body is said to be in equilibrium if it rotates about its C.G it moves horizontally it moves vertically none of these 5. Maximum shear stress theory for the failure of a material at the elastic limit, is known Guest’s or Trecas’ theory St. Venant’s theory Haig’s theory Rankine’s theory 6. In a shaft, the shear stress is not directly proportional to modulus of rigidity radius of the shaft length of the shaft angle of twist 7. The ratio of tangential and normal components of a stress on an inclined plane through θ° to the direction of the force, is : sin θ cos θ cot θ tan θ 8. Gradually applied static loads do not change with time their point of application magnitude direction All 9. The load on a spring per unit deflection, is called stiffness proof load proof stress proof resilience 10. Slenderness ratio of a long column, is area of cross-section divided by least radius of gyration radius of gyration divided by area of cross-section area of cross-section divided by radius of gyration length of column divided by least radius of gyration Loading … Question 1 of 10
