Theory of Structures Mock test – 1 || Civil Engineering Mock tests Welcome to your Theory of Structures Mock test - 1 Take an exciting test in Theory of structures You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1) A body is said to be in equilibrium if (A) It moves horizontally (B) It moves vertically (C) It rotates about its C.G. (D) None of these2) A close coil helical spring when subjected to a moment M having its axis along the axis of the helix (A) It is subjected to pure bending (B) Its mean diameter will decrease (C) Its number of coils will increase (D) All the above3) 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 (A) L/2 (B) L/3 (C) L/4 (D) L/54) Pick up the correct statement from the following: (A) The structural member subjected to compression and whose dimensions are small ascompared to its length, is called a stmt (B) The vertical compression members are generally known as columns or stanchions (C) Deflection in lateral direction of a long column, is generally known as buckling (D) All the above5) A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised (A) Steel experiences tensile force (B) Brass experiences compressive force (C) Composite beam gets subjected to a couple (D) All the above6) The forces acting on the bar as shown in the given figure introduce (A) Compressive stress (B) Tensile stress (C) Shear stress (D) None of these7) The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is (A) 1/4 (B) 1/2 (C) 1 (D) 28) Slenderness ratio of a long column, is (A) Area of cross-section divided by radius of gyration (B) Area of cross-section divided by least radius of gyration (C) Radius of gyration divided by area of cross-section (D) Length of column divided by least radius of gyration9) The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is (A) ½ (B) 1 (C) 1½ (D) 210) 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 (A) 2/3 (B) 3/2 (C) 5/8 (D) 8/511) A cantilever of length is subjected to a bending moment at its free end. If EI is the flexural rigidity of the section, the deflection of the free end, is (A) ML/EI (B) ML/2EI (C) ML²/2EI (D) ML²/3EI12) Maximum shear stress theory for the failure of a material at the elastic limit, is known (A) Guest's or Trecas' theory (B) St. Venant's theory (C) Rankine's theory (D) Haig's theory13) Maximum principal stress theory for the failure of a material at elastic point, is known (A) Guest's or Trecas' theory (B) St. Venant's theory (C) Rankine's theory (D) Von Mises' theory14) 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 (A) 4WD²n/d4N (B) 4W²Dn/d4N (C) 4W²D3n/d4N (D) 4W²D3n²/d4N15) The load on a spring per unit deflection, is called (A) Stiffness (B) Proof resilience (C) Proof stress (D) Proof load16) Gradually applied static loads do not change with time their (A) Magnitude (B) Direction (C) Point of application (D) All the above17) Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to (A) Modulus of rigidity (B) Angle of twist (C) Reciprocal of the length of the shaft (D) Moment of inertia of the shaft section18) 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 (A) E = 3K (1 - 2/m) (B) E = 2N (1 + 1/m) (C) (3/2)K (1 - 2/m) = N (1 + 1/m) (D) All the above19) 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 (A) (IX + IY)/2 (B) (IX - IY)/2 (C) IX + IY (D) (IX/IY)20) The forces acting normally on the cross section of a bar shown in the given figure introduce (A) Compressive stress (B) Tensile stress (C) Shear stress (D) None of these21) The yield moment of a cross section is defined as the moment that will just produce the yield stress in (A) The outer most fibre of the section (B) The inner most fibre of the section (C) The neutral fibre of the section (D) The fibre everywhere22) PEI/L² is the equation of Euler's crippling load if (A) Both the ends are fixed (B) Both the ends are hinged (C) One end is fixed and other end is free (D) One end is fixed and other end is hinged23) A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be (A) wa/27 (B) wa²/27 (C) w²a (D) wa²24) Maximum strain theory for the failure of a material at the elastic limit, is known as (A) Guest's or Trecas' theory (B) St. Venant's theory (C) Rankine's theory (D) Haig's theory25) 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 wl2/8h (B) S.F. will be zero throughout (C) B.M. will be zero throughout (D) All the above