MCQOPTIONS
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MCQOPTIONS
This section includes 97 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. |
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 × F |
| Answer» E. | |
| 52. |
A material is said to be perfectly elastic if |
| A. | It regains its original shape on removal of the load |
| B. | It regains its original shape partially on removal of the load |
| C. | It does not regain its original shape at all |
| D. | None of these |
| Answer» B. It regains its original shape partially on removal of the load | |
| 53. |
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. | 75 N/m2 |
| B. | 750 N/m2 |
| C. | 7500 N/m2 |
| D. | 75000 N/m2 |
| Answer» D. 75000 N/m2 | |
| 54. |
In plastic analysis, the shape factor for rectangular section, is |
| A. | 1.4 |
| B. | 1.5 |
| C. | 1.6 |
| D. | 1.7 |
| Answer» C. 1.6 | |
| 55. |
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. | 264 MN |
| B. | 274 MN |
| C. | 284 MN |
| D. | 294 MN |
| Answer» D. 294 MN | |
| 56. |
The ratio of maximum and average shear stresses on a rectangular section, is |
| A. | 1 |
| B. | 1.25 |
| C. | 1.5 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 57. |
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. | |
| 58. |
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 | |
| 59. |
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. | Wa/h |
| B. | Wa/2h |
| C. | 2W/ha |
| D. | 2h/Wa |
| Answer» C. 2W/ha | |
| 60. |
The maximum bending moment for a simply supported beam with a uniformly distributed load w/unit length, is |
| A. | WI/2 |
| B. | WI²/4 |
| C. | WI²/8 |
| D. | WI²/12 |
| Answer» D. WI²/12 | |
| 61. |
The greatest load which a spring can carry without getting permanently distorted, is called |
| A. | Stiffness |
| B. | Proof resilience |
| C. | Proof stress |
| D. | Proof load |
| Answer» E. | |
| 62. |
m1 and m2 are the members of two individual simple trusses of a compound truss. The compound truss will be rigid and determinate if |
| A. | m = m1 + m2 |
| B. | m = m1 + m2 + 1 |
| C. | m = m1 + m2 + 2 |
| D. | m = m1 + m2 + 3 |
| Answer» E. | |
| 63. |
For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is |
| A. | 0.303 |
| B. | 0.404 |
| C. | 0.505 |
| D. | 0.707 |
| Answer» E. | |
| 64. |
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. | |
| 65. |
A short column (30 cm × 20 cm) carries a load P1 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. | 2/3 |
| B. | 3/2 |
| C. | 8/5 |
| D. | 5/8 |
| Answer» D. 5/8 | |
| 66. |
The ratio of lateral strain to axial strain of a homogeneous material, is known |
| A. | Yield ratio |
| B. | Hookes ratio |
| C. | Poissons ratio |
| D. | Plastic ratio |
| Answer» D. Plastic ratio | |
| 67. |
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 | |
| 68. |
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. | L/d |
| B. | L/2d |
| C. | (L/2d)² |
| D. | (L/3d)² |
| Answer» D. (L/3d)² | |
| 69. |
The strain energy due to volumetric strain |
| A. | Is directly proportional to the volume |
| B. | Is directly proportional to the square of exerted pressure |
| C. | Is inversely proportional to Bulk modulus |
| D. | All the above |
| Answer» E. | |
| 70. |
The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called |
| A. | Stiffness |
| B. | Proof resilience |
| C. | Proof stress |
| D. | Proof load |
| Answer» C. Proof stress | |
| 71. |
A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2 ), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is |
| A. | 25 N |
| B. | 30 N |
| C. | 35 N |
| D. | 40 N |
| Answer» D. 40 N | |
| 72. |
A compound truss may be formed by connecting two simple rigid frames, by |
| A. | Two bars |
| B. | Three bars |
| C. | Three parallel bars |
| D. | Three bars intersecting at a point |
| Answer» C. Three parallel bars | |
| 73. |
The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is |
| A. | wl3 /3EI |
| B. | wl4 /3EI |
| C. | wl4 /8EI |
| D. | wl4 /12EI |
| Answer» D. wl4 /12EI | |
| 74. |
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 | |
| 75. |
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. | |
| 76. |
The assumption in the theory of bending of beams is: |
| A. | Material is homogeneous |
| B. | Material is isotropic |
| C. | Youngs modulus is same in tension as well as in compression |
| D. | All the above |
| Answer» E. | |
| 77. |
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. | b 3h/12 |
| Answer» D. b 3h/12 | |
| 78. |
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/d 4N |
| B. | 4W²Dn/d 4N |
| C. | 4W²D3n/d 4N |
| D. | 4W²D3n²/d 4N |
| Answer» D. 4W²D3n²/d 4N | |
| 79. |
The load on a spring per unit deflection, is called |
| A. | Stiffness |
| B. | Proof resilience |
| C. | Proof stress |
| D. | Proof load |
| Answer» B. Proof resilience | |
| 80. |
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. | 2 |
| Answer» E. | |
| 81. |
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 section |
| Answer» E. | |
| 82. |
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 these |
| Answer» E. | |
| 83. |
Gradually applied static loads do not change with time their |
| A. | Magnitude |
| B. | Direction |
| C. | Point of application |
| D. | All the above |
| Answer» E. | |
| 84. |
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. | |
| 85. |
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) |
| Answer» D. (IX/IY) | |
| 86. |
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 | |
| 87. |
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/5 |
| Answer» E. | |
| 88. |
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. | |
| 89. |
The forces in the members of simple trusses, may be analysed by |
| A. | Graphical method |
| B. | Method of joints |
| C. | Method of sections |
| D. | All the above |
| Answer» E. | |
| 90. |
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 |
| Answer» E. | |
| 91. |
Maximum shear stress theory for the failure of a material at the elastic limit, is known |
| A. | Guests or Trecas theory |
| B. | St. Venants theory |
| C. | Rankines theory |
| D. | Haigs theory |
| Answer» B. St. Venants theory | |
| 92. |
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. | |
| 93. |
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 above |
| Answer» B. Its mean diameter will decrease | |
| 94. |
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. | |
| 95. |
Maximum strain theory for the failure of a material at the elastic limit, is known as |
| A. | Guests or Trecas theory |
| B. | St. Venants theory |
| C. | Rankines theory |
| D. | Haigs theory |
| Answer» C. Rankines theory | |
| 96. |
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 above |
| Answer» E. | |
| 97. |
Maximum principal stress theory for the failure of a material at elastic point, is known |
| A. | Guests or Trecas theory |
| B. | St. Venants theory |
| C. | Rankines theory |
| D. | Von Mises theory |
| Answer» D. Von Mises theory | |