MCQOPTIONS
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MCQOPTIONS
This section includes 104 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
__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. | WL²/2EI |
| B. | WL²/3EI |
| C. | WL3/2EI |
| D. | WL3/3EI |
| Answer» E. | |
| 52. |
__If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following:__ |
| A. | Q = S + F |
| B. | Q = S – F |
| C. | Q = F – S |
| D. | Q = S √ó F |
| Answer» E. | |
| 53. |
__Stress may be defined as__ |
| A. | Force per unit length |
| B. | Force per unit volume |
| C. | Force per unit area |
| D. | None of these |
| Answer» D. None of these | |
| 54. |
__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. | L/2 |
| B. | L/3 |
| C. | L/4 |
| D. | L/5 |
| Answer» C. L/4 | |
| 55. |
__At any point of a beam, the section modulus may be obtained by dividing the moment of inertia of the section by__ |
| A. | Depth of the section |
| B. | Depth of the neutral axis |
| C. | Maximum tensile stress at the section |
| D. | Maximum compressive stress at the section |
| Answer» C. Maximum tensile stress at the section | |
| 56. |
__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. | BD² + mbd²)/6D] |
| B. | BD³ + mbd³)/6D] |
| C. | BD² + mbd³)/4D] |
| D. | BD² + mbd²)/4D] |
| Answer» C. BD¬¨‚⧠+ mbd¬¨‚â•)/4D] | |
| 57. |
__The locus of the moment of inertia about inclined axes to the principal axis, is__ |
| A. | Straight line |
| B. | Parabola |
| C. | Circle |
| D. | Ellipse |
| Answer» E. | |
| 58. |
_A shaft rotating N.R.M. under a torque T, transmits a power$? |
| A. | /30 Newton metres/sec |
| B. | /30 Newton metres/min |
| C. | /60 Newton metres/min |
| D. | /60 Newton metres/sec |
| Answer» B. /30 Newton metres/min | |
| 59. |
_Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then$? |
| A. | M/I = R/E = F/Y |
| B. | I/M = R/E = F/Y |
| C. | M/I = E/R = E/Y |
| D. | M/I = E/R = Y/F |
| Answer» D. M/I = E/R = Y/F | |
| 60. |
_The assumption in the theory of bending of beams is:$? |
| A. | Material is homogeneous |
| B. | Material is isotropic |
| C. | Young’s modulus is same in tension as well as in compression |
| D. | All the above |
| Answer» E. | |
| 61. |
_A simply supported rolled steel joist 8 m long carries a uniformly distributed load over it span so that the maximum bending stress is 75 N/mm². If the slope at the ends is 0.005 radian and the value of E = 0.2 × 106 N/mm², the depth of the joist, is$? |
| A. | 200 mm |
| B. | 250 mm |
| C. | 300 mm |
| D. | 400 mm |
| Answer» E. | |
| 62. |
_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$? |
| A. | ML/EI |
| B. | ML/2EI |
| C. | ML²/2EI |
| D. | ML²/3EI |
| Answer» E. | |
| 63. |
_The ratio of the length and diameter of a simply supported uniform circular beam which experiences maximum bending stress equal to tensile stress due to same load at its mid span, is$? |
| A. | 1/8 |
| B. | 1/4 |
| C. | 1/2 |
| D. | 1/3 |
| Answer» D. 1/3 | |
| 64. |
_Maximum shear stress theory for the failure of a material at the elastic limit, is known$? |
| A. | Guest's or Trecas' theory |
| B. | St. Venant's theory |
| C. | Rankine's theory |
| D. | Haig's theory |
| Answer» B. St. Venant's theory | |
| 65. |
_P = 4π² EI/L² is the equation of Euler's crippling load if$? |
| 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 hinged |
| Answer» B. Both the ends are hinged | |
| 66. |
_The ratio of the area of cross-section of a circular section to the area of its core, is$? |
| A. | 4 |
| B. | 8 |
| C. | 12 |
| D. | 16 |
| Answer» E. | |
| 67. |
_A steel rod of sectional area 250 sq. mm connects two parallel walls 5 m apart. The nuts at the ends were tightened when the rod was heated to 100°C. If steel = 0.000012/C°, Esteel = 0.2 MN/mm², the tensile force developed at a temperature of 50°C, is$? |
| A. | 80 N/mm² |
| B. | 100 N/mm 2 |
| C. | 120 N/mm² |
| D. | 150 N/mm² |
| Answer» D. 150 N/mm¬¨‚⧠| |
| 68. |
_section modulus of a square section of side B and that of a circular section of the ratio of the diameter D, is$? |
| A. | 2 /15 |
| B. | 3 /16 |
| C. | 3 /8 |
| D. | /16 |
| Answer» C. 3 /8 | |
| 69. |
_For beams of uniform strength, if depth is constant,$? |
| A. | Width b M |
| B. | Width b M |
| C. | Width b 3 M |
| D. | Width b 1/M |
| Answer» B. Width b M | |
| 70. |
_For calculating the allowable stress of long columns σ0 = σy/n [1 - a (1/r)²]is the empirical formula, known as$? |
| A. | Straight line formula |
| B. | Parabolic formula |
| C. | Perry |
| D. | Rankine |
| Answer» C. Perry | |
| 71. |
_The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is$? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 72. |
_Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as$? |
| A. | Compound beams |
| B. | Indeterminate beams |
| C. | Determinate beams |
| D. | Composite beams |
| Answer» E. | |
| 73. |
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. | ωl²/4h |
| B. | ωl²/8h |
| C. | ωl²/12h |
| D. | ωl²/16h |
| Answer» E. | |
| 74. |
The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is? |
| A. | ¬Ω |
| B. | 1 |
| C. | 1¬Ω |
| D. | 2 |
| Answer» E. | |
| 75. |
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. | 50/EIc |
| B. | 100/EIc |
| C. | 150/EIc |
| D. | 200/EIc |
| Answer» E. | |
| 76. |
The eccentricity (e) of a hollow circular column, external diameter 25 cm, internal diameter 15 cm for an eccentric load 100 t for non-development of tension, is? |
| A. | 2.75 cm |
| B. | 3.00 cm |
| C. | 3.50 cm |
| D. | 4.25 cm |
| Answer» E. | |
| 77. |
The ratio of shear stress and shear strain of an elastic material, is? |
| A. | Modulus of Rigidity |
| B. | Shear Modulus |
| C. | Modulus of Elasticity |
| D. | Both A. and B. |
| Answer» E. | |
| 78. |
The equivalent length of a column of length L having one end fixed and the other end free, is? |
| A. | 2L |
| B. | L |
| C. | L/2 |
| D. | L |
| Answer» B. L | |
| 79. |
The stiffness of the close coil helical spring is? |
| A. | d4N/8D3n |
| B. | d4N/4D3n |
| C. | 4D3N/d4n |
| D. | 8D3N/d4n |
| Answer» B. d4N/4D3n | |
| 80. |
Principal planes are subjected to? |
| A. | Normal stresses only |
| B. | Tangential stresses only |
| C. | Normal stresses as well as tangential stresses |
| D. | None of these |
| Answer» B. Tangential stresses only | |
| 81. |
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. | 1 cm |
| B. | 1.5 cm |
| C. | 2 cm |
| D. | 2.5 cm |
| Answer» D. 2.5 cm | |
| 82. |
The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is? |
| A. | F/A |
| B. | F/2A |
| C. | 3F/2A |
| D. | 2F/3A |
| Answer» D. 2F/3A | |
| 83. |
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. | 2w w l at the fixed end |
| B. | l) at the fixed end |
| C. | w l) at the fixed end |
| D. | 3w l at the fixed end |
| Answer» C. w l) at the fixed end | |
| 84. |
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. | 1/2 |
| B. | 2/3 |
| C. | 1/4 |
| D. | 1/3 |
| Answer» C. 1/4 | |
| 85. |
The moment of inertia of a triangular section (height h, base b) about its base, is? |
| A. | bh²/12 |
| B. | b²h/12 |
| C. | bh³/12 |
| D. | b³h/12 |
| Answer» D. b¬¨‚â•h/12 | |
| 86. |
The ratio of maximum shear stress to average shear stress of a circular beam, is? |
| A. | 2/3 |
| B. | 3/2 |
| C. | 3/4 |
| D. | 4/3 |
| Answer» E. | |
| 87. |
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 gyration |
| Answer» E. | |
| 88. |
The ratio of lateral strain to axial strain of a homogeneous material, is known? |
| A. | Yield ratio |
| B. | Hooke’s ratio |
| C. | Poisson’s ratio |
| D. | Plastic ratio |
| Answer» D. Plastic ratio | |
| 89. |
A simply supported beam which carries a uniformly distributed load has two equal overhangs. To have maximum B.M. produced in the beam least possible, the ratio of the length of the overhang to the total length of the beam, is? |
| A. | 0.207 |
| B. | 0.307 |
| C. | 0.407 |
| D. | 0.508 |
| Answer» B. 0.307 | |
| 90. |
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. | 4.0 mm |
| B. | 4.5 mm |
| C. | 5.0 mm |
| D. | 5.5 mm |
| Answer» D. 5.5 mm | |
| 91. |
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. | H = 0 |
| B. | V = 0 |
| C. | M = 0 |
| D. | All the above |
| Answer» E. | |
| 92. |
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 everywhere |
| Answer» B. The inner most fibre of the section | |
| 93. |
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/d4N |
| Answer» D. 4W¬¨‚â§D3n¬¨‚â§/d4N | |
| 94. |
The vertical reaction for the arch is |
| A. | wa/2l |
| B. | wl/a |
| C. | wa/l |
| D. | wa²/2l |
| Answer» B. wl/a | |
| 95. |
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. | 2 |
| Answer» E. | |
| 96. |
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 above |
| Answer» E. | |
| 97. |
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 | |
| 98. |
parabolic arch of span and rise , is given by The equation of a |
| A. | y = h/l² × (1 – x ) |
| B. | y = 2h/l² × (1 – x) |
| C. | y = 3h/l² × (1 – x) |
| D. | y = 4h/l² × (1 – x) |
| Answer» E. | |
| 99. |
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. | 8/5 |
| Answer» E. | |
| 100. |
The ratio of the deflections of the free end of a cantilever due to an isolated load at 1/3rd and 2/3rd of the span, is |
| A. | 1/7 |
| B. | 2/7 |
| C. | 3/7 |
| D. | 2/5 |
| Answer» C. 3/7 | |