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.
| 1. |
For the close coil helical spring of the maximum deflection is |
| A. | WD3n/d 4N |
| B. | 2WD3n/d 4N |
| C. | 4W²D3n/d 4N |
| D. | 8WD3n/d 4N |
| Answer» E. | |
| 2. |
At yield point of a test piece, the material |
| A. | Obeys Hookes law |
| B. | Behaves in an elastic manner |
| C. | Regains its original shape on removal of the load |
| D. | Undergoes plastic deformation |
| Answer» E. | |
| 3. |
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. | |
| 4. |
The ratio of moments of inertia of a triangular section about its base and about a centroidal axis parallel to its base, is |
| A. | 1.0 |
| B. | 1.5 |
| C. | 2.0 |
| D. | 3.0 |
| Answer» E. | |
| 5. |
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 | |
| 6. |
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 | |
| 7. |
The stiffness of the close coil helical spring is |
| A. | d 4N/8D 3n |
| B. | d 4N/4D 3n |
| C. | 4D 3N/d 4n |
| D. | 8D 3N/d 4n |
| Answer» B. d 4N/4D 3n | |
| 8. |
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 | |
| 9. |
In plastic analysis, the shape factor for a circular section, is |
| A. | 1.5 |
| B. | 1.6 |
| C. | 1.7 |
| D. | 1.75 |
| Answer» D. 1.75 | |
| 10. |
Flat spiral springs |
| A. | Consist of uniform thin strips |
| B. | Are supported at outer end |
| C. | Are wound by applying a torque |
| D. | All the above |
| Answer» E. | |
| 11. |
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 | |
| 12. |
Stress may be expressed in Newtons |
| A. | Per millimetre square (N/mm2 ) |
| B. | Per centimetre square (N/cm2 ) |
| C. | Per metre square (N/m2 ) |
| D. | None of these |
| Answer» B. Per centimetre square (N/cm2 ) | |
| 13. |
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. | |
| 14. |
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 | |
| 15. |
Total strain energy theory for the failure of a material at elastic limit, is known |
| A. | Guests or Trecas theory |
| B. | St. Venants theory |
| C. | Rankines theory |
| D. | Haigs theory |
| Answer» E. | |
| 16. |
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 | |
| 17. |
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 | |
| 18. |
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. | 1.125 cm3 |
| B. | 2.125 cm3 |
| C. | 3.125 cm3 |
| D. | 4.125 cm2 |
| Answer» D. 4.125 cm2 | |
| 19. |
A three hinged arch is generally hinged at its supports and |
| A. | At one quarter span |
| B. | At the crown |
| C. | Anywhere in the rib |
| D. | None of these |
| Answer» D. None of these | |
| 20. |
In plastic analysis, the shape factor for a triangular section, is |
| A. | 1.5 |
| B. | 1.34 |
| C. | 2.34 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 21. |
A truss containing j joints and m members, will be a simple truss if |
| A. | m = 2j - 3 |
| B. | j = 2m - 3 |
| C. | m = 3j - 2 |
| D. | j = 3m - 2 |
| Answer» B. j = 2m - 3 | |
| 22. |
The locus of reaction of a two hinged semi-circular arch, is |
| A. | Straight line |
| B. | Parabola |
| C. | Circle |
| D. | Hyperbola |
| Answer» B. Parabola | |
| 23. |
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. | 2 mm |
| B. | 3 mm |
| C. | 4 mm |
| D. | 5 mm |
| Answer» E. | |
| 24. |
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. | M/T |
| B. | T/M |
| C. | 2M/T |
| D. | 2T/M |
| Answer» D. 2T/M | |
| 25. |
A square column carries a load P at the centroid of one of the quarters of the square. If a is the side of the main square, the combined bending stress will be |
| A. | p/a² |
| B. | 2p/a² |
| C. | 3p/a² |
| D. | 4p/a² |
| Answer» D. 4p/a² | |
| 26. |
The ratio of the maximum deflections of a simply supported beam with a central load W and of a cantilever of same length and with a load W at its free end, is |
| A. | 1/8 |
| B. | 1/10 |
| C. | 1/12 |
| D. | 1/16 |
| Answer» E. | |
| 27. |
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. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 90° |
| Answer» E. | |
| 28. |
For calculating the allowable stress of long columns. The empirical formula 0 y/n) (1 - a l/r), is known as |
| A. | Straight line formula |
| B. | Parabolic formula |
| C. | Perrys formula |
| D. | Rankines formula |
| Answer» B. Parabolic formula | |
| 29. |
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. | 411 N mm |
| B. | 511 N mm |
| C. | 611 N mm |
| D. | 711 N mm |
| Answer» D. 711 N mm | |
| 30. |
The point of contraflexure is the point where |
| A. | B.M. changes sign |
| B. | B.M. is maximum |
| C. | B.M. is minimum |
| D. | S.F. is zero |
| Answer» B. B.M. is maximum | |
| 31. |
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. | WL3 /3EL |
| B. | WL3 /8EL |
| C. | WL3 /24EL |
| D. | WL3 /48EL |
| Answer» E. | |
| 32. |
In a shaft, the shear stress is not directly proportional to |
| A. | Radius of the shaft |
| B. | Angle of twist |
| C. | Length of the shaft |
| D. | Modulus of rigidity |
| Answer» D. Modulus of rigidity | |
| 33. |
The general expression for the B.M. of a beam of length l is the beam carries M = (wl/2) x - (wx²/2) |
| A. | A uniformly distributed load w/unit length |
| B. | A load varying linearly from zero at one end to w at the other end |
| C. | An isolated load at mid span |
| D. | None of these |
| Answer» B. A load varying linearly from zero at one end to w at the other end | |
| 34. |
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. | |
| 35. |
Shear strain energy theory for the failure of a material at elastic limit, is due to |
| A. | Rankine |
| B. | Guest or Trecas |
| C. | St. Venant |
| D. | Von Mises |
| Answer» E. | |
| 36. |
If M, I, R, E, F, and Y are the bending moment, moment of inertia, radius of curvature, modulus of 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 | |
| 37. |
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/mm2 |
| C. | 120 N/mm2 |
| D. | 150 N/mm2 |
| Answer» D. 150 N/mm2 | |
| 38. |
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. | |
| 39. |
If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs the ratio of inner diameter to outer diameter, is 17/64 (fs/N) |
| A. | 1/2 |
| B. | 1/3 |
| C. | 1/4 |
| D. | 1/5 |
| Answer» D. 1/5 | |
| 40. |
A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be, |
| A. | 10 m |
| B. | 12 m |
| C. | 14 m |
| D. | 16 m |
| Answer» E. | |
| 41. |
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 | |
| 42. |
The shape factor of standard rolled beam section varies from |
| A. | 1.10 to 1.20 |
| B. | 1.20 to 1.30 |
| C. | 1.30 to 1.40 |
| D. | 1.40 to 1.50 |
| Answer» B. 1.20 to 1.30 | |
| 43. |
The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is |
| A. | Circle |
| B. | Parabola |
| C. | Ellipse |
| D. | Straight line |
| Answer» D. Straight line | |
| 44. |
In case of principal axes of a section |
| A. | Sum of moment of inertia is zero |
| B. | Difference of moment inertia is zero |
| C. | Product of moment of inertia is zero |
| D. | None of these |
| Answer» D. None of these | |
| 45. |
Co-efficient of wind resistance of a circular surface, is |
| A. | 1/2 |
| B. | 1/3 |
| C. | 2/3 |
| D. | 3/2 |
| Answer» D. 3/2 | |
| 46. |
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. | [W (1 + f/G)]/A |
| B. | (1 - g/f)/A |
| C. | [W (2 + f/G)]/A |
| D. | [W (2 + g/f)]/A |
| Answer» B. (1 - g/f)/A | |
| 47. |
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. | |
| 48. |
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. | |
| 49. |
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 | |
| 50. |
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. | |