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MCQOPTIONS
This section includes 392 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of span 2l and rise h hinged at the crown, the horizontal reaction at the support, is |
| A. | a/h |
| B. | a/2h |
| C. | W/ha |
| D. | h/Wa |
| Answer» C. W/ha | |
| 252. |
A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber). |
| A. | D² + mbd²)/6D] |
| B. | D³ + mbd³)/6D] |
| C. | D² + mbd³)/4D] |
| D. | D² + mbd²)/4D] |
| Answer» C. D² + mbd³)/4D] | |
| 253. |
If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 × 105 N/mm²) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm 2, the angle of twist in radians, is |
| A. | 0.001 |
| B. | 0.002 |
| C. | 0.0025 |
| D. | 0.003 |
| Answer» D. 0.003 | |
| 254. |
The area of the core of a column of cross sectional area A, is |
| A. | 1/3) A |
| B. | 1/6) A |
| C. | 1/12) A |
| D. | 1/18) A |
| Answer» E. | |
| 255. |
A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is |
| A. | L/2AE |
| B. | L/AE |
| C. | ²L/AE |
| D. | ²L/2AE |
| Answer» E. | |
| 256. |
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. | /2 |
| B. | /3 |
| C. | /4 |
| D. | /5 |
| Answer» E. | |
| 257. |
In case of a simply supported rectangular beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is |
| A. | /2 |
| B. | /3 |
| C. | /4 |
| D. | /5 |
| Answer» C. /4 | |
| 258. |
The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch). |
| A. | 0/EIc |
| B. | 00/EIc |
| C. | 50/EIc |
| D. | 00/EIc |
| Answer» E. | |
| 259. |
For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D’. Distances AD, DD’ and AD’ when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is |
| A. | 0° |
| B. | 5° |
| C. | 0° |
| D. | 0° |
| Answer» E. | |
| 260. |
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. | a/27 |
| B. | a²/27 |
| C. | ²a |
| D. | a² |
| Answer» E. | |
| 261. |
A steel bar 5 m × 50 mm is loaded with 250,000 N. If the modulus of elasticity of the material is 0.2 MN/mm² and Poisson’s ratio is 0.25, the change in the volume of the bar is: |
| A. | .125 cm³ |
| B. | .125 cm³ |
| C. | .125 cm³ |
| D. | .125 cm² |
| Answer» D. .125 cm² | |
| 262. |
Inertia of a rectangular section of width and depth about an axis passing the moment of through C.G. and parallel to its width is |
| A. | D²/6 |
| B. | D³/6 |
| C. | D³/12 |
| D. | ²D/6 |
| Answer» D. ²D/6 | |
| 263. |
The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is |
| A. | L²/2EI |
| B. | L²/3EI |
| C. | L3/2EI |
| D. | L3/3EI |
| Answer» E. | |
| 264. |
A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to ? per unit run at the right end. The horizontal thrust is |
| A. | l²/4h |
| B. | l²/8h |
| C. | l²/12h |
| D. | l²/16h |
| Answer» E. | |
| 265. |
Pick up the incorrect statement from the following: The torsional resistance of a shaft is directly proportional to |
| A. | odulus of rigidity |
| B. | ngle of twist |
| C. | eciprocal of the length of the shaft |
| D. | oment of inertia of the shaft section |
| Answer» E. | |
| 266. |
The general expression for the B.M. of a beam of length l is the beam carries M = (wl/2) x – (wx²/2) |
| A. | uniformly distributed load w/unit length |
| B. | load varying linearly from zero at one end to w at the other end |
| C. | n isolated load at mid span |
| D. | one of these |
| Answer» B. load varying linearly from zero at one end to w at the other end | |
| 267. |
The maximum bending moment for a simply supported beam with a uniformly distributed load w/unit length, is |
| A. | I/2 |
| B. | I²/4 |
| C. | I²/8 |
| D. | I²/12 |
| Answer» D. I²/12 | |
| 268. |
The strain energy due to volumetric strain |
| A. | s directly proportional to the volume |
| B. | s directly proportional to the square of exerted pressure |
| C. | s inversely proportional to Bulk modulus |
| D. | ll the above |
| Answer» E. | |
| 269. |
P = 4π² EI/L² is the equation of Euler's crippling load if |
| A. | oth the ends are fixed |
| B. | oth the ends are hinged |
| C. | ne end is fixed and other end is free |
| D. | ne end is fixed and other end is hinged |
| Answer» B. oth the ends are hinged | |
| 270. |
The horizontal thrust on the ends of a two hinged semicircular arch of radius ‘R’ carrying |
| A. | uniformly distributed load ? per unit run over its right half span, is ? ?R/? |
| B. | uniformly distributed load ? per unit run over its entire span is 4/3 ?R/? |
| C. | distributed load varying from zero at the left end to ? per unit horizontal run at the right end, is ? ?R/? |
| D. | ll the above |
| Answer» E. | |
| 271. |
The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is |
| A. | L3/3EL |
| B. | L3/8EL |
| C. | L3/24EL |
| D. | L3/48EL |
| Answer» E. | |
| 272. |
The assumption in the theory of bending of beams is: |
| A. | aterial is homogeneous |
| B. | aterial is isotropic |
| C. | oung’s modulus is same in tension as well as in compression |
| D. | ll the above |
| Answer» E. | |
| 273. |
A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm², the side of the rod, is |
| A. | cm |
| B. | .5 cm |
| C. | cm |
| D. | .5 cm |
| Answer» D. .5 cm | |
| 274. |
A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm², the tensile force developed at a temperature of 50°C, is |
| A. | 0 N/mm² |
| B. | 00 N/mm 2 |
| C. | 20 N/mm² |
| D. | 50 N/mm² |
| Answer» D. 50 N/mm² | |
| 275. |
The ratio of lateral strain to axial strain of a homogeneous material, is known |
| A. | ield ratio |
| B. | ooke’s ratio |
| C. | oisson’s ratio |
| D. | lastic ratio |
| Answer» D. lastic ratio | |
| 276. |
If a concrete column 200 × 200 mm in cross-section is reinforced with four steel bars of 1200 mm² total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm² and Es is 15 Ec |
| A. | 64 MN |
| B. | 74 MN |
| C. | 84 MN |
| D. | 94 MN |
| Answer» D. 94 MN | |
| 277. |
In the truss, the force in the member AC is |
| A. | .25 t compressive |
| B. | .75 t tensile |
| C. | tensile |
| D. | compressive |
| Answer» E. | |
| 278. |
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. | mm |
| B. | mm |
| C. | mm |
| D. | mm |
| Answer» E. | |
| 279. |
A cantilever of length ‘L’ is subjected to a bending moment ‘M’ at its free end. If EI is the flexural rigidity of the section, the deflection of the free end, is |
| A. | L/EI |
| B. | L/2EI |
| C. | L²/2EI |
| D. | L²/3EI |
| Answer» E. | |
| 280. |
constant, depth of a cantilever of length of uniform strength loaded with Keeping breadth uniformly distributed load varies from zero at the free end and |
| A. | w w l at the fixed end |
| B. | ) at the fixed end |
| C. | l) at the fixed end |
| D. | w l at the fixed end |
| Answer» C. l) at the fixed end | |
| 281. |
a uniform circular bar of diameter d and length , which extends by an The deflection of amount under a tensile pull , when it carries the same load at its mid-span, is |
| A. | l/2d |
| B. | ²l/3d² |
| C. | l²/3d² |
| D. | ²l²/3d² |
| Answer» D. ²l²/3d² | |
| 282. |
The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is |
| A. | /8 |
| B. | /4 |
| C. | /2 |
| D. | /3 |
| Answer» D. /3 | |
| 283. |
The ratio of the length and depth of a simply supported rectangular beam which experiences maximum bending stress equal to tensile stress, due to same load at its mid span, is |
| A. | /2 |
| B. | /3 |
| C. | /4 |
| D. | /3 |
| Answer» C. /4 | |
| 284. |
A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is |
| A. | /d |
| B. | /2d |
| C. | L/2d)² |
| D. | L/3d)² |
| Answer» D. L/3d)² | |
| 285. |
section modulus of a square section of side B and that of a circular section of the ratio of the diameter D, is |
| A. | /15 |
| B. | /16 |
| C. | /8 |
| D. | 16 |
| Answer» C. /8 | |
| 286. |
A short column (30 cm × 20 cm) carries a load P 1 at 4 cm on one side and another load P2at 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. | /3 |
| B. | /2 |
| C. | /5 |
| D. | /8 |
| Answer» D. /8 | |
| 287. |
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. | 00 mm |
| B. | 50 mm |
| C. | 00 mm |
| D. | 00 mm |
| Answer» E. | |
| 288. |
The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is |
| A. | /A |
| B. | /2A |
| C. | F/2A |
| D. | F/3A |
| Answer» D. F/3A | |
| 289. |
For calculating the allowable stress of long columns σ0 = σy/n [1 - a (1/r)²]is the empirical formula, known as |
| A. | traight line formula |
| B. | arabolic formula |
| C. | erry |
| D. | ankine |
| Answer» C. erry | |
| 290. |
A compound bar consists of two bars of equal length. Steel bar cross -section is 3500 mm²and that of brass bar is 3000 mm². These are subjected to a compressive load 100,000 N. If Eb = 0.2 MN/mm² and Eb = 0.1 MN/mm², the stresses developed are: |
| A. | = 10 N/mm² s = 20 N/mm 2 |
| B. | = 8 N/mm² s = 16 N/mm² |
| C. | = 6 N/mm² s = 12 N/mm² |
| D. | = 5 N/mm² s = 10 N/mm² |
| Answer» B. = 8 N/mm² s = 16 N/mm² | |
| 291. |
A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised |
| A. | teel experiences tensile force |
| B. | rass experiences compressive force |
| C. | omposite beam gets subjected to a couple |
| D. | ll the above |
| Answer» E. | |
| 292. |
For beams of uniform strength, if depth is constant, |
| A. | idth b M |
| B. | idth b M |
| C. | idth b 3 M |
| D. | idth b 1/M |
| Answer» B. idth b M | |
| 293. |
A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm² is: |
| A. | .0 mm |
| B. | .5 mm |
| C. | .0 mm |
| D. | .5 mm |
| Answer» D. .5 mm | |
| 294. |
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 |
| A. | 11 N mm |
| B. | 11 N mm |
| C. | 11 N mm |
| D. | 11 N mm |
| Answer» D. 11 N mm | |
| 295. |
H V are the algebraic sums of the forces resolved horizontally and vertically respectively, M is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon |
| A. | = 0 |
| B. | = 0 |
| C. | = 0 |
| D. | ll the above |
| Answer» E. | |
| 296. |
A masonry dam (density = 20,000 N/m³) 6 m high, one metre wide at the top and 4 m wide at the base, has vertical water face. The minimum stress at the base of the dam when the reservoir is full, will be |
| A. | 5 N/m² |
| B. | 50 N/m² |
| C. | 500 N/m² |
| D. | 5000 N/m² |
| Answer» D. 5000 N/m² | |
| 297. |
A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is |
| A. | /T |
| B. | /M |
| C. | M/ T |
| D. | T/M |
| Answer» D. T/M | |
| 298. |
Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then |
| A. | /I = R/E = F/Y |
| B. | /M = R/E = F/Y |
| C. | /I = E/R = F/Y |
| D. | /I = E/R = Y/F |
| Answer» D. /I = E/R = Y/F | |
| 299. |
A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is |
| A. | circle |
| B. | ellipse. |
| Answer» B. ellipse. | |
| 300. |
The maximum B.M. due to an isolated load in a three hinged parabolic arch, (span l, rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance |
| A. | 0.0025 |
| B. | 0.003 |
| C. | 0.005 |
| Answer» D. | |