MCQOPTIONS
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MCQOPTIONS
This section includes 187 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. |
Alembert’s principle is used for |
| A. | Reducing the problem of kinetics to equivalent statics problem |
| B. | Determining stresses in the truss |
| C. | Stability of floating bodies |
| D. | Designing safe structures |
| Answer» B. Determining stresses in the truss | |
| 52. |
The effect of arching a beam, is |
| A. | To reduce the bending moment throughout |
| B. | To increase the bending moment throughout |
| C. | Nothing on the bending throughout |
| D. | All the above |
| Answer» B. To increase the bending moment throughout | |
| 53. |
Effect of a force on a body depends upon |
| A. | Magnitude |
| B. | Direction |
| C. | Position or line of action |
| D. | All of the above |
| Answer» E. | |
| 54. |
Strain energy of any member may be defined as work done on it |
| A. | To deform it |
| B. | To resist elongation |
| C. | To resist shortening |
| D. | All the above |
| Answer» E. | |
| 55. |
As compared to uniaxial tension or compression, the strain energy stored in bending is only |
| A. | 1/8 |
| B. | 1/4 |
| C. | 1/3 |
| D. | 1/2 |
| Answer» D. 1/2 | |
| 56. |
Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one |
| A. | Ellipse |
| B. | Hyperbola |
| C. | Parabola |
| D. | Circle |
| Answer» C. Parabola | |
| 57. |
The width b and depth d of a beam cut from a wooden cylindrical log of 100 cm diameter for maximum strength are |
| A. | b = 57.73 cm d = 81.65 cm |
| B. | b = 81.65 cm d = 57.73 cm |
| C. | b = 50.00 cm d = 50.00 cm |
| D. | b = 40.00 cm d = 80.00 cm |
| Answer» B. b = 81.65 cm d = 57.73 cm | |
| 58. |
Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction |
| A. | Along the plane |
| B. | Horizontally |
| C. | Vertically |
| D. | At an angle equal to the angle of friction to the inclined plane |
| Answer» E. | |
| 59. |
If a steel rod of 20 mm diameter and 5 metres long elongates by 2.275 mm when subjected to an axial pull of 3000 kg, the stress developed, is |
| A. | 9.5541 kg/cm2 |
| B. | 95.541 kg/cm2 |
| C. | 955.41 kg/cm2 |
| D. | 9554.1 kg/cm2 |
| Answer» D. 9554.1 kg/cm2 | |
| 60. |
A simply supported wooden beam 150 cm long and having a cross section 16 cm × 24 cm carries a concentrated load, at the centre. If the permissible stress ft = 75 kg/cm2 and fs= 10 kg/cm2 the safe load is |
| A. | 3025 kg |
| B. | 3050 kg |
| C. | 3075 kg |
| D. | 3100 kg |
| Answer» D. 3100 kg | |
| 61. |
Two non-collinear parallel equal forces acting in opposite direction |
| A. | Balance each other |
| B. | Constitute a moment |
| C. | Constitute a couple |
| D. | Constitute a moment of couple |
| Answer» D. Constitute a moment of couple | |
| 62. |
Failure of riveted joints is due to |
| A. | Tearing of the plates between the rivet hole and the edge of the plate |
| B. | Tearing of plates between rivets |
| C. | Shearing of rivets |
| D. | All the above |
| Answer» E. | |
| 63. |
In a simply supported beam L with a triangular load W varying from zero at one end to the maximum value at the other end, the maximum bending moment is |
| A. | WL/3 |
| B. | WL |
| C. | WL/4 |
| D. | WL3 |
| Answer» E. | |
| 64. |
A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal |
| A. | Density of metal can’t be determined |
| B. | Metal is twice as dense as water |
| C. | Metal will float in water |
| D. | Metal is twice as dense as unknown fluid |
| Answer» B. Metal is twice as dense as water | |
| 65. |
The principal stresses at a point are 100, 100 and -200 kgf/cm2, the octahedral shear stress at the point is: |
| A. | 100 kg/cm2 |
| B. | 200 kg/cm2 |
| C. | 300 kg/cm2 |
| D. | 400 kg/cm2 |
| Answer» B. 200 kg/cm2 | |
| 66. |
The ratio of the moment of inertia of a circular plate and that of a square plate for equal depth, is |
| A. | Less than one |
| B. | Equal to one |
| C. | More than one |
| D. | Equal |
| Answer» E. | |
| 67. |
Coulomb friction is the friction between |
| A. | Bodies having relative motion |
| B. | Two dry surfaces |
| C. | Two lubricated surfaces |
| D. | Solids and liquids |
| Answer» B. Two dry surfaces | |
| 68. |
A trolley wire weighs 1.2 kg per meter length. The ends of the wire are attached to two poles 20 meters apart. If the horizontal tension is 1500 kg find the dip in the middle of the span |
| A. | 2.5 cm |
| B. | 3.0 cm |
| C. | 4.0 cm |
| D. | 5.0 cm |
| Answer» D. 5.0 cm | |
| 69. |
Along the neutral axis of a simply supported beam |
| A. | Fibres do not undergo strain |
| B. | Fibres undergo minimum strain |
| C. | Fibres undergo maximum strain |
| D. | None of these |
| Answer» B. Fibres undergo minimum strain | |
| 70. |
The ratio of strengths of solid to hollow shafts, both having outside diameter D and hollow having inside diameter D/2, in torsion, is |
| A. | 1/4 |
| B. | 1/2 |
| C. | 1/16 |
| D. | 15/15 |
| Answer» E. | |
| 71. |
According to principle of moments |
| A. | If a system of coplanar forces is in equilibrium, then their algebraic sum is zero |
| B. | If a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero |
| C. | The algebraic sum of the moments of any two forces about any point is equal to moment of their resultant about the same point |
| D. | Positive and negative couples can be balanced |
| Answer» C. The algebraic sum of the moments of any two forces about any point is equal to moment of their resultant about the same point | |
| 72. |
The stress in the wall of a cylinder in a direction normal to its longitudinal axis, due to a force acting along the circumference, is known as |
| A. | Yield stress |
| B. | Longitudinal stress |
| C. | Hoop stress |
| D. | Circumferential stress |
| Answer» D. Circumferential stress | |
| 73. |
A simply supported beam (l + 2a) with equal overhangs (a) carries a uniformly distributed load over the whole length, the B.M. changes sign if |
| A. | l > 2a |
| B. | l < 2a |
| C. | l = 2a |
| D. | l = 4a |
| Answer» B. l < 2a | |
| 74. |
A force acting on a body may |
| A. | Introduce internal stresses |
| B. | Balance the other forces acting on it |
| C. | Retard its motion |
| D. | All of the above |
| Answer» E. | |
| 75. |
Struts are load carrying members of a frame structure which are subjected to |
| A. | Axial tension loads |
| B. | Axial compressive loads |
| C. | Torsional loads |
| D. | Transverse loads |
| Answer» C. Torsional loads | |
| 76. |
The C.G. of a plane lamina will not be at its geometrical centre in the case of a |
| A. | Right angled triangle |
| B. | Equilateral triangle |
| C. | Square |
| D. | Circle |
| Answer» B. Equilateral triangle | |
| 77. |
A cantilever carries is uniformly distributed load W over its whole length and a force W acts at its free end upward. The net deflection of the free end will be |
| A. | Zero |
| B. | (5/24) (WL3/EI) upward |
| C. | (5/24) (WL3/EI) downward |
| D. | None of these |
| Answer» C. (5/24) (WL3/EI) downward | |
| 78. |
A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to |
| A. | 25 |
| B. | 50 |
| C. | 100 |
| D. | 250 |
| Answer» C. 100 | |
| 79. |
The maximum deflection of |
| A. | A simply supported beam carrying a uniformly increasing load from either end and having the apex at the mid span is WL3/60EI |
| B. | A fixed ended beam carrying a distributed load over the span is WL3/384EI |
| C. | A fixed ended beam carrying a concentrated load at the mid span is WL3/192EI |
| D. | All the above |
| Answer» E. | |
| 80. |
The phenomenon of slow extension of materials having constant load, i.e. increasing with the time is called |
| A. | Creeping |
| B. | Yielding |
| C. | Breaking |
| D. | None of these |
| Answer» B. Yielding | |
| 81. |
On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be |
| A. | Downwards at its upper end |
| B. | Upwards at its upper end |
| C. | Perpendicular to the wall at its upper end |
| D. | Zero at its upper end |
| Answer» E. | |
| 82. |
Ties are load carrying members of a frame, which are subjected to |
| A. | Transverse loads |
| B. | Axial tension loads |
| C. | Axial compressive loads |
| D. | Torsional loads |
| Answer» C. Axial compressive loads | |
| 83. |
The radius of gyration of a rectangular section is not proportional to |
| A. | Square root of the moment of inertia |
| B. | Square root of the inverse of the area |
| C. | Square root of the moment of inertia divided by area of the section |
| D. | None of these |
| Answer» E. | |
| 84. |
A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be three times the maximum tensile stress, centre of gravity of the section from flange side is |
| A. | h/4 |
| B. | h/3 |
| C. | h/2 |
| D. | 2/3 h |
| Answer» B. h/3 | |
| 85. |
Influence lines are drawn for structures |
| A. | Of any type |
| B. | Statically determinate |
| C. | Pin-jointed truss |
| D. | None of these |
| Answer» B. Statically determinate | |
| 86. |
Which of the following is not a scalar quantity? |
| A. | Time |
| B. | Mass |
| C. | Volume |
| D. | Acceleration |
| Answer» E. | |
| 87. |
The stress necessary to initiate yielding, is considerably |
| A. | More than that necessary to continue it |
| B. | Less than that necessary to continue it |
| C. | More than that necessary to stop it |
| D. | Less than that necessary to stop it |
| Answer» B. Less than that necessary to continue it | |
| 88. |
The slenderness ratio of a vertical column of a square cross-section of 2.5 cm sides and 300 cm length, is |
| A. | 200 |
| B. | 240 |
| C. | 360 |
| D. | 416 |
| Answer» E. | |
| 89. |
Forces are called coplanar when all of them acting on body lie in |
| A. | One point |
| B. | One plane |
| C. | Different planes |
| D. | Perpendicular planes |
| Answer» C. Different planes | |
| 90. |
The property by which a body returns to its original shape after removal of the force, is called |
| A. | Plasticity |
| B. | Elasticity |
| C. | Ductility |
| D. | Malleability |
| Answer» C. Ductility | |
| 91. |
In the lever of third order, load W, effort P and fulcrum F are oriented as follows |
| A. | W between P and F |
| B. | F between W and P |
| C. | P between W and F |
| D. | W, P and F all on one side |
| Answer» B. F between W and P | |
| 92. |
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 deflection of the |
| A. | WR3n/Cr4 |
| B. | 2WR3n/Cr4 |
| C. | 3WR3n/Cr4 |
| D. | 4WR3n/Cr4 |
| Answer» E. | |
| 93. |
The property of a material by which it can be beaten or rolled into thin plates, is called |
| A. | Malleability |
| B. | Ductility |
| C. | Plasticity |
| D. | Elasticity |
| Answer» B. Ductility | |
| 94. |
Dynamic friction as compared to static friction is |
| A. | Same |
| B. | More |
| C. | Less |
| D. | May be less of more depending on nature of surfaces and velocity |
| Answer» D. May be less of more depending on nature of surfaces and velocity | |
| 95. |
Pick up the correct assumption of the theory of simple bending |
| A. | The value of the Young’s modulus is the same in tension as well as in compression |
| B. | Transverse section of a beam remains plane before and after bending |
| C. | The material of the beam is homogeneous and isotropic |
| D. | All the above |
| Answer» E. | |
| 96. |
In rectangular columns (cross-section b × h), the core is a |
| A. | Rectangle of lengths b/2 and h/2 |
| B. | Square of length b/2 |
| C. | Rhombus of length h/2 |
| D. | Rhombus of diagonals b/3 and h/3 |
| Answer» E. | |
| 97. |
A cantilever beam rectangular in cross-section is subjected to an isolated load at its free end. If the width of the beam is doubled, the deflection of the free end will be changed in the ratio of |
| A. | 8 |
| B. | 1/8 |
| C. | 1/2 |
| D. | 3 |
| Answer» D. 3 | |
| 98. |
The resultant of the following three couples 20 kg force, 0.5 m arm, +ve sense 30 kg force, 1 m arm, -ve sense 40 kg force, 0.25 m arm, +ve sense having arm of 0.5 m will be |
| A. | 20 kg, -ve sense |
| B. | 20 kg, +ve sense |
| C. | 10 kg, +ve sense |
| D. | 10 kg, -ve sense |
| Answer» B. 20 kg, +ve sense | |
| 99. |
A diagram which shows the variations of the axial load for all sections of the span of a beam, is called |
| A. | Bending moment diagram |
| B. | Shear force diagram |
| C. | Thrust diagram |
| D. | Stress diagram |
| Answer» D. Stress diagram | |
| 100. |
Center of gravity of a solid cone lies on the axis at the height |
| A. | One-fourth of the total height above base |
| B. | One-third of the total height above base |
| C. | One-half of the total height above base |
| D. | Three-eighth of the total height above the base |
| Answer» B. One-third of the total height above base | |