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These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .

1. |
## An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, thebeam |

A. | Is safe in shear |

B. | Is safe with stirrups |

C. | Is safe with stirrups and inclined bars |

D. | Needsrevision of section |

Answer» D. Needsrevision of section |

2. |
## According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is |

A. | Half of the width of the slab |

B. | Two-third of the width of the slab |

C. | Three-fourth of the width of the slab |

D. | Four-fifth of the width of the slab |

Answer» C. Three-fourth of the width of the slab |

3. |
## The load stress of a section can be reduced by |

A. | Decreasing the lever arm |

B. | Increasing the total perimeter of bars |

C. | Replacing larger bars by greater number of smallbars |

D. | Replacing smaller bars by greater number of greater bars |

Answer» C. Replacing larger bars by greater number of smallbars |

4. |
## The diameter of the column head support a flat slab, is generally kept |

A. | 0.25 times the span length |

B. | 0.25 times the diameter of the column |

C. | 4.0 cm larger than the diameter of the column |

D. | 5.0 cm larger than the diameter of the column |

Answer» A. 0.25 times the span length |

5. |
## If is the uniformly distributed load on a circular slab of radius fixed at its ends, the maximum positive radial moment at its centre, is |

A. | 3WR²/16 |

B. | 2WR²/16 |

C. | WR²/16 |

D. | None of these |

Answer» C. WR²/16 |

6. |
## The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is |

A. | 35 |

B. | 25 |

C. | 30 |

D. | 20 |

Answer» C. 30 |

7. |
## If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is |

A. | Square |

B. | Rectangular |

C. | Trapezoidal |

D. | Triangular |

Answer» B. Rectangular |

8. |
## The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept |

A. | 0.7 |

B. | 0.8 |

C. | 0.9 |

D. | 0.6 |

Answer» C. 0.9 |

9. |
## Pick up the correct statement from the following: |

A. | Lateralreinforcementin R.C.C. columnsis provided to preventthe longitudinal reinforcement from buckling |

B. | Lateral reinforcement prevents the shearing of concrete on diagonal plane |

C. | Lateral reinforcement stops breaking away of concrete cover, due to buckling |

D. | All the above |

Answer» D. All the above |

10. |
## In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as |

A. | A key |

B. | A cut-off wall |

C. | A rib |

D. | All the above |

Answer» D. All the above |

11. |
## Lapped splices in tensile reinforcement are generally not used for bars of size larger than |

A. | 18 mmdiameter |

B. | 24 mmdiameter |

C. | 30 mmdiameter |

D. | 36 mmdiameter |

Answer» D. 36 mmdiameter |

12. |
## Minimum spacing between horizontal parallel reinforcement of the same size should not be less than |

A. | Onediameter |

B. | 2.5diameters |

C. | 3 diameters |

D. | 3.5 diameters |

Answer» A. Onediameter |

13. |
## A very comfortable type of stairs is |

A. | Straight |

B. | Dog legged |

C. | Geometrical |

D. | Open newel |

Answer» D. Open newel |

14. |
## Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension |

A. | Two times |

B. | Three times |

C. | Four times |

D. | Five times |

Answer» C. Four times |

15. |
## The width of the flange of a L-beam, should be less than |

A. | One-sixth of the effective span |

B. | Breadth of therib + four times thickness of the slab |

C. | Breadth of the rib + half clear distance betweenribs |

D. | Least of theabove |

Answer» D. Least of theabove |

16. |
## A pre-stressed concrete member is preferred because |

A. | Its dimensions are not decided from the diagonal tensile stress |

B. | Large size of long beams carrying large shear force need not be adopted |

C. | Removal of cracks in the members due toshrinkage |

D. | All the above |

Answer» D. All the above |

17. |
## If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a |

A. | Simply supported beam |

B. | Continuous beam |

C. | Cantilever beam |

D. | None of these |

Answer» C. Cantilever beam |

18. |
## A pile of length carrying a uniformlydistributed load per metre length is suspended at two points, the maximum, B.M. at the centre of the pile or at the points of suspension, is |

A. | WL/8 |

B. | WL²/24 |

C. | WL²/47 |

D. | WL²/16 |

Answer» C. WL²/47 |

19. |
## If is the net upward pressure on a square footing of side for a square column of side , the maximum bending moment is given by |

A. | B.M = pb (c - a)/4 |

B. | B.M = pb (b -a)²/4 |

C. | B.M = pb (b -a)²/8 |

D. | B.M = pb (b +a)/8 |

Answer» C. B.M = pb (b -a)²/8 |

20. |
## To ensure uniform pressure distribution, the thickness of the foundation, is |

A. | Kept uniform throughout |

B. | Increased gradually towards the edge |

C. | Decreased gradually towards the edge |

D. | Kept zero at theedge |

Answer» C. Decreased gradually towards the edge |

21. |
## longitudinal bars and lateral stirrups, is |

A. | Stress in concrete × area of concrete |

B. | Stress in steel × area ofsteel |

C. | Stress in concrete × area of concrete + Stress in steel × area of steel |

D. | None of these |

Answer» C. Stress in concrete × area of concrete + Stress in steel × area of steel |

22. |
## If p1 and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress to the principal plane carrying the principal stress p1, is: |

A. | [(p - p p p sin 2 |

B. | [(p - p p p cos 2 |

C. | [(p p p - p cos 2 |

D. | [(p p p - p /2] sin 2 |

Answer» C. [(p p p - p cos 2 |

23. |
## The maximum permissible size of aggregates to be used in casting the ribs of a slab, is |

A. | 5 mm |

B. | 7.5 mm |

C. | 10 mm |

D. | 15 mm |

Answer» C. 10 mm |

24. |
## Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam |

A. | Are curtailed if not required to resist the bendingmoment |

B. | Are bent up at suitable places to serve as shearreinforcement |

C. | Are bent down at suitable places to serve asshear reinforcement |

D. | Are maintained at bottom to provide at least local bond stress |

Answer» C. Are bent down at suitable places to serve asshear reinforcement |

25. |
## Steel bars are generally connected together to get greater length than the standard length by providing |

A. | Straight bar splice |

B. | Hooked splice |

C. | Dowel splice |

D. | All the above |

Answer» D. All the above |

26. |
## The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of |

A. | 10 mm |

B. | 15 mm |

C. | 20 mm |

D. | 25 mm |

Answer» D. 25 mm |

27. |
## Top bars are extended to the projecting parts of the combined footing of two columns Ldistance apart for a distance of |

A. | 0.1 L from the outer edge of column |

B. | 0.1 L from the centre edge of column |

C. | Half the distance of projection |

D. | One-fourth the distance of projection |

Answer» B. 0.1 L from the centre edge of column |

28. |
## For M 150 grade concrete (1:2:4) the moment of resistance factor is |

A. | 0.87 |

B. | 8.50 |

C. | 7.50 |

D. | 5.80 |

Answer» B. 8.50 |

29. |
## is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is. The minimum stress on the beam subjected to a maximum bending moment is |

A. | f = (P/A) -(Z/M) |

B. | f = (A/P) -(M/Z) |

C. | f = (P/A) - (M/Z) |

D. | f = (P/A) - (M/6Z) |

Answer» C. f = (P/A) - (M/Z) |

30. |
## If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is: |

A. | (1 - C)mf - eE |

B. | (C - 1)mf + eE |

C. | (C - 1)mf - eE |

D. | (1 - C)mf + eE |

Answer» B. (C - 1)mf + eE |

31. |
## In a pre-stressed member it is advisable to use |

A. | Low strength concrete only |

B. | High strength concrete only |

C. | Low strength concrete but high tensile steel |

D. | High strength concrete and high tensile steel |

Answer» D. High strength concrete and high tensile steel |

32. |
## An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus |

A. | Triangular load of the wall |

B. | UDL of wall |

C. | UDL of wall + load from the roof |

D. | Triangular load + load from the roof |

Answer» C. UDL of wall + load from the roof |

33. |
## The minimum clear cover for R.C.C. columns shall be |

A. | Greater of 40 mm or diameter |

B. | Smaller of 40 mm or diameter |

C. | Greater of 25 mm or diameter |

D. | Smaller of 25 mm or diameter |

Answer» C. Greater of 25 mm or diameter |

34. |
## The minimum thickness of a flat slab is taken |

A. | L/32 for end panels without drops |

B. | L/36 for end panels without drops |

C. | L/36 for interior panels without drop |

D. | All the above |

Answer» D. All the above |

35. |
## The design of heel slab of a retaining wall is based on the maximum bending moment due to: |

A. | Its own weight |

B. | Weight of the soil above it |

C. | Load of the surcharge, if any |

D. | All the above |

Answer» D. All the above |

36. |
## An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is |

A. | Safe in shear |

B. | Is safe with stirrups |

C. | Is safe with stirrups and inclinedmembers |

D. | Needsrevision ofthe section |

Answer» A. Safe in shear |

37. |
## The neutral axis of a T-beam exists |

A. | Within the flange |

B. | At the bottom edge of the slab |

C. | Below the slab |

D. | All the above |

Answer» D. All the above |

38. |
## A pre-cast pile generally used, is |

A. | Circular |

B. | Square |

C. | Octagonal |

D. | Square with corners chamfered |

Answer» D. Square with corners chamfered |

39. |
## The spacing of transverse reinforcement of column is decided by the following consideration. |

A. | The least lateral dimension of the column |

B. | Sixteen timesthe diameter of the smallest longitudinal reinforcing rods in the column |

C. | Forty-eight times the diameter of transverse reinforcement |

D. | All the above |

Answer» D. All the above |

40. |
## The self-weight of the footing, is |

A. | Not considered for calculating the upward pressure onfooting |

B. | Also considered for calculating the upward pressure onfooting |

C. | Not considered for calculating the area of the footing |

D. | Both (b) and(c) |

Answer» A. Not considered for calculating the upward pressure onfooting |

41. |
## Pick up the incorrect statement from the following: |

A. | In the stem of a retaining wall, reinforcement is provided near the earth side |

B. | In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab |

C. | In the heel slab of a retaining wall, reinforcement is provided at the top of the slab |

D. | None of these |

Answer» D. None of these |

42. |
## If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is |

A. | D = 0.0775 a |

B. | D = 0.775 a |

C. | D = 0.775 a |

D. | D = 0.775 a2 |

Answer» B. D = 0.775 a |

43. |
## After pre-stressing process is completed, a loss of stress is due to |

A. | Shrinkage of concrete |

B. | Elastic shortening of concrete |

C. | Creep of concrete |

D. | All the above |

Answer» D. All the above |

44. |
## In a simply supported slab, alternate bars are curtailed at |

A. | 1/4th of thespan |

B. | 1/5th of thespan |

C. | 1/6th of thespan |

D. | 1/7th of thespan |

Answer» D. 1/7th of thespan |

45. |
## If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width |

A. | R + T |

B. | T - R |

C. | 2 +T2) |

D. | R - T |

Answer» C. 2 +T2) |

46. |
## If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is |

A. | [( - )/2] h |

B. | [( + )/4] h |

C. | [( + )/2] h |

D. | ( - h |

Answer» C. [( + )/2] h |

47. |
## In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2 , nominal reinforcement is provided at a pitch of |

A. | One-half lever arm of the section |

B. | One-third lever arm of the section |

C. | Lever arm of the section |

D. | One and half lever arm of the section |

Answer» C. Lever arm of the section |

48. |
## The transverse reinforcements provided at right angles to the main reinforcement |

A. | Distribute the load |

B. | Resist the temperature stresses |

C. | Resist the shrinkage stress |

D. | All the above |

Answer» D. All the above |

49. |
## Long and short spans of a two way slab are ly and lx and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. According to Rankine Grashoff theory |

A. | (wx/wy) = (ly/lx) |

B. | (wx/wy) = (ly/lx)² |

C. | (wx/wy) = (ly/lx)4 |

D. | None of these |

Answer» C. (wx/wy) = (ly/lx)4 |

50. |
## The pitch of the main bars in a simply supported slab, should not exceed its effective depth by |

A. | Three times |

B. | Four times |

C. | Five times |

D. | Six times |

Answer» D. Six times |

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