MCQOPTIONS
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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.
| 1. |
A steel bar 5 m x 50 mm is loaded with 250, 000 N. If the modulus of elasticity of the material is 0.2 MN/mm and Poisson's ratio is 0.25, the change in the volume of the bar is : |
| A. | 1.125 cm |
| B. | 2.125 cm |
| C. | 3.125 cm |
| D. | 4.125 cm |
| Answer» D. 4.125 cm | |
| 2. |
For permissible shear stress , the torque transmitted by a thin tube of mean diameter and wall thickness , is |
| A. | π |
| Answer» B. | |
| 3. |
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 x 10 N/mm, the deflection of the free end, is |
| A. | 2 mm |
| B. | 3 mm |
| C. | 4 mm |
| D. | 5 mm |
| E. | 6 mm |
| Answer» E. 6 mm | |
| 4. |
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/mm. If the slope at the ends is 0.005 radian and the value of = 0.2 x 10 N/mm, the depth of the joist, is |
| A. | 200 mm |
| B. | 250 mm |
| C. | 300 mm |
| D. | 350 mm |
| E. | 400 mm |
| Answer» F. | |
| 5. |
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» D. one end is fixed and other end is hinged. | |
| 6. |
If a three hinged parabolic arch, (span , rise ) is carrying a uniformly distributed load /unit length over the entire span, |
| A. | horizontal thrust is |
| B. | /8 |
| C. | S.F. will be zero throughout |
| D. | B.M. will be zero throughout |
| E. | all the above. |
| Answer» E. all the above. | |
| 7. |
The equivalent length of a column of length , having both the ends hinged, is |
| A. | 2 |
| Answer» C. | |
| 8. |
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 α = 0.000012/C°, = 0.2 MN/mm, the tensile force developed at a temperature of 50°C, is |
| A. | 80 N/mm |
| B. | 100 N/mm |
| C. | 120 N/mm |
| D. | 150 N/mm |
| Answer» D. 150 N/mm | |
| 9. |
Keeping breadth constant, depth of a cantilever of length of uniform strength loaded with uniformly distributed load varies from zero at the free end and |
| A. | at the fixed end |
| B. | at the fixed end |
| Answer» C. | |
| 10. |
The eccentricity () of a hollow circular column, external diameter 25 cm, internal diameter 15 cm for an eccentric load 100 for non-development of tension, is |
| A. | 2.75 cm |
| B. | 3.00 cm |
| C. | 3.50 cm |
| D. | 4.25 cm |
| E. | 5.0 cm |
| Answer» E. 5.0 cm | |
| 11. |
If and are the moments of inertia of a section about and axes, the polar moment of inertia of the section, is |
| A. | + |
| Answer» D. | |
| 12. |
For determining the force in the member of the truss shown in the given figure by method of sections, the section is made to pass through , and and the moments are taken about |
| A. | joint |
| B. | joint |
| C. | joint |
| D. | joint |
| Answer» D. joint | |
| 13. |
is the equation of Euler's crippling load if |
| A. | both at 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 | |
| 14. |
The forces acting on the bar as shown in the given figure introduce |
| A. | compressive stress |
| B. | tensile stress |
| C. | shear stress |
| D. | none of these. |
| Answer» D. none of these. | |
| 15. |
The horizontal thrust on the ends of a two hinged semicircular arch of radius carrying |
| A. | a uniformly distributed load ω per unit run over its right half span, is |
| B. | a uniformly distributed load ω per unit run over its entire span is |
| C. | a distributed load varying from zero at the left end to ω per unit horizontal run at the right end, is |
| D. | all the above. |
| Answer» E. | |
| 16. |
The equivalent length is of a column of length having both the ends fixed, is |
| A. | 2 |
| Answer» D. | |
| 17. |
A masonry dam (density = 20, 000 N/m) 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/m |
| B. | 750 N/m |
| C. | 7500 N/m |
| D. | 75000 N/m |
| Answer» D. 75000 N/m | |
| 18. |
For calculating the allowable stress of long columns is the empirical formula, known as |
| A. | Straight line formula |
| B. | Parabolic formula |
| C. | Perry's formula |
| D. | Rankine's formula. |
| Answer» C. Perry's formula | |
| 19. |
In case of a simply supported I-section beam of span and loaded with a central load , the length of elasto-plastic zone of the plastic hinge, is |
| A. | none of these. |
| Answer» E. | |
| 20. |
The degree of indeterminacy of the frame in the given figure, is |
| A. | zero |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 21. |
The equivalent length of a column of length having one end fixed and the other end free, is |
| A. | 2 |
| Answer» B. | |
| 22. |
To determine the force in of the truss shown in the given figure a section is passed through , and , and the moments are taken about |
| A. | joint |
| B. | joint |
| C. | joint |
| D. | joint. |
| Answer» D. joint. | |
| 23. |
In the cable shown in the given figure, the minimum tension occurs at |
| A. | between |
| B. | and |
| C. | between |
| D. | and |
| Answer» D. and | |
| 24. |
A shaft rotating under a torque , transmits a power |
| A. | Newton metres/sec |
| B. | Newton metres/min |
| C. | Newton metres/min |
| D. | Newton metres/sec |
| Answer» B. Newton metres/min | |
| 25. |
The equivalent length of a column of length , having one end fixed and other end hinged, is |
| A. | 2 |
| Answer» E. | |
| 26. |
For calculating the permissible stress is the emprical formula, known as |
| A. | Straight line formula |
| B. | Parabolic formula |
| C. | Perry's formula |
| D. | Rankine's formula. |
| Answer» E. | |
| 27. |
The maximum height of a masonry dam of a triangular section whose base width is and specific gravity , is |
| A. | |
| Answer» B. | |
| 28. |
A close coil helical spring when subjected to a moment 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 | |
| 29. |
The forces acting normally on the cross section of a bar shown in the given figure introduce |
| A. | compressive stress |
| B. | tensile stress |
| C. | shear stress |
| D. | none of these. |
| Answer» B. tensile stress | |
| 30. |
If a concrete column 200 x 200 mm in cross-section is reinforced with four steel bars of 1200 mm total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm and is 15 |
| A. | 264 MN |
| B. | 274 MN |
| C. | 284 MN |
| D. | 294 MN |
| E. | None of these. |
| Answer» D. 294 MN | |
| 31. |
A shaft subjected to a bending moment and a torque , experiences |
| A. | maximum bending stress = |
| B. | maximum shear stress = |
| C. | both (a) and (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 32. |
By applying the static equations Σ = 0, Σ = 0 and Σ = 0, to a determinate structure, we may determine |
| A. | supporting reactions only |
| B. | shear forces only |
| C. | bending moments only |
| D. | internal forces only |
| E. | all the above. |
| Answer» F. | |
| 33. |
If a solid shaft (diameter 20 cm, length 400 cm, = 0.8 x 10 N/mm) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm, the angle of twist in radians, is |
| A. | 0.001 |
| B. | 0.002 |
| C. | 0.0025 |
| D. | 0.003 |
| E. | 0.005 |
| Answer» D. 0.003 | |
| 34. |
For calculating the allowable stress of long columns. The empirical formula , is known as |
| A. | Straight line formula |
| B. | Parabolic formula |
| C. | Perry's formula |
| D. | Rankine's formula. |
| Answer» B. Parabolic formula | |
| 35. |
There are two hinged semicircular arches and of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load at their crowns. The horizontal thrust at their supports will be in the ratio of |
| A. | 1 : 1 1/2 : 2 |
| B. | 2 : 1 1/2 : 1 |
| C. | 1 : 1 : 2 |
| D. | none of these. |
| Answer» D. none of these. | |
| 36. |
A spring of mean radius 40 mm contains 8 action coils of steel ( = 80000 N/mm), 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 | |
| 37. |
If , , and 1/ are modulus of elasticity, modulus of rigidity. Bulk modulus and Poisson ratio of the material, the following relationship holds good |
| A. | all the above. |
| Answer» E. | |
| 38. |
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 = 2 x 10 kg/cm, 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 | |
| 39. |
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/mm is : |
| A. | 4.0 mm |
| B. | 4.5 mm |
| C. | 5.0 mm |
| D. | 5.5 mm |
| E. | 6.0 mm |
| Answer» D. 5.5 mm | |
| 40. |
Keeping the depth constant, the width of a cantilever of length of uniform strength loaded with a uniformly distributed load varies from zero at the free end and |
| A. | at the fixed end |
| B. | at the fixed end |
| C. | at the fixed end |
| D. | at the fixed end |
| Answer» D. at the fixed end | |
| 41. |
For determining the support reactions at and of a three hinged arch, points and are joined and produced to intersect the load line at and a line parallel to the load line through at '. Distances , ' and ' when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at and is |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 90° |
| Answer» E. | |
| 42. |
A concentrated load is supported by the free end of a quadrantal ring whose end is fixed. The ratio of the vertical to horizontal deflections of the end , is |
| A. | π |
| Answer» C. | |
| 43. |
A material which obeys Hook's law, is subjected to direct stress σ. At its elastic limit, the following statement is true, |
| A. | Strain is equal to |
| B. | Maximum shear stress = |
| C. | Strain energy = |
| D. | Shear strain energy = |
| E. | All the above. |
| Answer» F. | |
| 44. |
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 | |
| 45. |
y/n) (1 – a l/r), is For calculating the allowable stress of long columns. The empirical formula 0 known as_________________? |
| A. | Straight line formula |
| B. | Parabolic formula |
| C. | Perry’s formula |
| D. | Rankine’s formula |
| Answer» B. Parabolic formula | |
| 46. |
Total strain energy theory for the failure of a material at elastic limit, is known_________________? |
| A. | Guest’s or Trecas’ theory |
| B. | St. Venant’s theory |
| C. | Rankine’s theory |
| D. | Haig’s theory |
| Answer» E. | |
| 47. |
To determine the force in BD of the truss shown in the given figure a section is passed through BD, CD and CE, and the moments are taken about________________? |
| A. | A joint |
| B. | B joint |
| C. | C joint |
| D. | D joint |
| Answer» D. D joint | |
| 48. |
There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of_______________? |
| A. | 1 : 1½ : 2 |
| B. | 2 : 1½ : 1 |
| C. | 1 : 1 : 2 |
| D. | None of these |
| Answer» D. None of these | |
| 49. |
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 | |
| 50. |
The vertical reaction for the arch is________________? |
| A. | wa/2l |
| B. | wl/a |
| C. | wa/l |
| D. | wa²/2l |
| Answer» B. wl/a | |