🚧 Civil Engineering Solved MCQs with Answers

Practice 1228 approved 🚧 Civil Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

1228 solved MCQs

A closely coiled helical spring of radius R, contains n turns and is subjected to an axial load W. If the radius of the coil wire is r and modulus of rigidity of the coil material is C, the stress developed in the helical spring isAnswer: 2WR/nr³ If the shear force along a section of a beam is zero, the bending moment at the section isAnswer: maximum A simply supported beam of span L carries a concentrated load W at its mid-span. The maximum bending moment M isAnswer: WL/4 The ratio of the maximum deflections of a beam simply supported at its ends with an isolated central load and that of with a uniformly distributed load over its entire length, isAnswer: 24/15 The shape of the bending moment diagram over the length of a beam, carrying a uniformly distributed load is alwaysAnswer: parabolic The minimum number of rivets for the connection of a gusset plate, isAnswer: 2 A triangular section having base b, height h, is placed with its base horizontal. If the shear stress at a depth y from top is q, the maximum shear stress isAnswer: 3S/bh The slenderness ratio of a vertical column of a square cross-section of 2.5 cm sides and 300 cm length, isAnswer: 416 A rectangular beam 20 cm wide is subjected to a maximum shearing force of 10, 000 kg, the corresponding maximum shearing stress being 30 kg/cm2. The depth of the beam isAnswer: 25 cm The maximum twisting moment a shaft can resist, is the product of the permissible shear stress andAnswer: polar modulus For a simply supported beam with a central load, the bending moment isAnswer: maximum at the centre For a given material Young's modulus is 200 GN/m² and modulus of rigidity is 80 GN/m². The value of Poisson's ratio isAnswer: 0.25 The ratio of the moment of inertia of a circular plate and that of a square plate for equal depth, isAnswer: equal to 3π/16 If a shaft is rotating N revolutions per minute with an applied torque T kg-m, the horse power being transmitted by the shaft, isAnswer: 2nNT/4500 If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed byAnswer: 1/2 For a simply supported beam of length L, the bending moment M is described as M = a (x - x3/L2), 0 ≤ x < L; where a is a constant. The shear force will be zero atAnswer: x = L/√3 The deflection of any rectangular beam simply supported, isAnswer: inversely proportional to the cube of its depth If a rectangular beam measuring 10 x 18 x 400 cm carries a unformly distributed load such that the bending stress developed is 100 kg/cm². The intensity of the load per metre length, isAnswer: 270 kg Influence lines are drawn for structuresAnswer: of any type A shaft turning 150 r.p.m. is subjected to a torque of 150 kgm. Horse power transmitted by the shaft isAnswer: 10 π A simply supported beam carrying a uniformly distributed load over its whole span, is propped at the centre of the span so that the beam is held to the level of the end supports. The reaction of the prop will beAnswer: 5/8th the distributed load The range within which a load can be applied on a rectangular column, to avoid any tensile stress, isAnswer: one-third of the base In a beam, the neutral planeAnswer: does not change during deformation When loads are applied proportionately to a frame structure containing its members in one plane, the structure is calledAnswer: plane frame The shear stress at any section of a shaft is maximumAnswer: at the top of the surface The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, isAnswer: one-quarter of the radius A beam is said to be of uniform strength, ifAnswer: bending stress is same throughout the beam In a tension test, the yield stress is 300 kg/cm², in the octa hedral shear stress at the point is:Answer: 100 √2 kg/cm² The radius of gyration of a rectangular section is not proportional toAnswer: none of these A reinforced concrete beam is assumed to be made ofAnswer: heterogeneous material