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MCQOPTIONS
This section includes 430 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. |
If is weight of a retaining wall and is the horizontal earth pressure, the factor of safety against sliding, is |
| A. | 1.0 |
| B. | 1.25 |
| C. | 1.5 |
| D. | 2.0 |
| E. | 2.5 |
| Answer» D. 2.0 | |
| 2. |
If permissible working stresses in steel and concrete are respectively 1400 kg/cm and 80 kg/cm and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is |
| A. | 37 cm |
| B. | 38 cm |
| C. | 39 cm |
| D. | 40 cm |
| Answer» E. | |
| 3. |
If kg/m is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is cm, the depth of foundation is given by |
| A. | = 0.00775 |
| B. | = 0.0775 |
| C. | = 0.07775 |
| D. | = 0.775 |
| Answer» B. = 0.0775 | |
| 4. |
If the length of a combined footing for two columns metres apart is and the projection on the left side of the exterior column is , then the projection on the right side of the exterior column, in order to have a uniformly distributed load, is (where is the distance of centre of gravity of column loads). |
| A. | - |
| B. | ) |
| Answer» E. | |
| 5. |
A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm steel. If the modular ratio () is 15, the depth of the neutral axis, is |
| A. | 20 cm |
| B. | 25 cm |
| C. | 30 cm |
| D. | 35 cm |
| E. | 40 cm |
| Answer» D. 35 cm | |
| 6. |
The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm and 250 kg/cm respectively. If = 15, the depth of its neutral axis is |
| A. | 20 cm |
| B. | 25 cm |
| C. | 30 cm |
| D. | 35 cm |
| E. | 40 cm |
| Answer» D. 35 cm | |
| 7. |
If the ratio of long and short spans of a two way slab with corners held down is , the actual reduction of B.M. is given by |
| A. | none of these. |
| Answer» E. | |
| 8. |
In the zone of R.C.C. beam where shear stress is less than 5 kg/cm, 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» D. one and half lever arm of the section. | |
| 9. |
[ + ( - 1)] known as equivalent concrete area of R.C.C. is given by |
| A. | modular ratio method |
| B. | load factor method |
| C. | ultimate load method |
| D. | none of these. |
| Answer» B. load factor method | |
| 10. |
If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm and 1400 kg/cm respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is |
| A. | 0.496% |
| B. | 0.596% |
| C. | 0.696% |
| D. | 0.796% |
| E. | none of these. |
| Answer» D. 0.796% | |
| 11. |
If the maximum shear stress at the end of a simply supported R.C.C. beam of 6 m effective span is 10 kg/cm, the share stirrups are provided for a distance from either end where is |
| A. | 50 cm |
| B. | 100 cm |
| C. | 150 cm |
| D. | 200 cm |
| Answer» D. 200 cm | |
| 12. |
If the bearing capacity of soil is 10 tonnes/cm and the projection of plain concrete footing from walls, is cm, the depth of footing is |
| A. | = 0.0775 |
| B. | = 0.775 |
| C. | = 0.775 |
| D. | = 0.775 a |
| Answer» C. = 0.775 | |
| 13. |
If is a constant depending upon the ratio of the width of the slab to its effective span , is the distance of the concentrated load from the nearer support, is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab is |
| A. | All the above. |
| Answer» C. | |
| 14. |
To ensure that the hogging bending moment at two points of suspension of a pile of length equals the sagging moment at its centre, the distances of the points of suspension from either end, is |
| A. | 0.107 |
| B. | 0.207 |
| C. | 0.307 |
| D. | 0.407 |
| Answer» C. 0.307 | |
| 15. |
If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm, the length of the beam having nominal reinforcement, is |
| A. | 4 cm |
| B. | 6 m |
| C. | 8 m |
| D. | 10 m |
| Answer» D. 10 m | |
| 16. |
A simply supported beam , 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm, the area of steel required, is |
| A. | 14 cm |
| B. | 15 cm |
| C. | 16 cm |
| D. | 17 cm |
| E. | 18 cm |
| Answer» D. 17 cm | |
| 17. |
Based on punching shear consideration, the overall depth of a combined footing under a column , is |
| A. | None of these. |
| Answer» C. | |
| 18. |
The maximum shear stress () in a rectangular beam is |
| A. | 1.25 times the average |
| B. | 1.50 times the average |
| C. | 1.75 times the average |
| D. | 2.0 times the average |
| E. | 2.5 times the average. |
| Answer» C. 1.75 times the average | |
| 19. |
Total pressure on the vertical face of a retaining wall of height acts parallel to free surface and from the base at a distance of |
| A. | /4 |
| B. | /3 |
| C. | /2 |
| D. | 2 |
| E. | /3 |
| Answer» C. /2 | |
| 20. |
In a combined footing if shear stress does not exceed 5 kg/cm, the nominal stirrups provided are |
| A. | 6 legged |
| B. | 8 legged |
| C. | 10 legged |
| D. | 12 legged |
| E. | none of these. |
| Answer» C. 10 legged | |
| 21. |
A singly reinforced beam has breadth , effective depth , depth of neutral axis and critical neutral axis . If and are permissible compressive and tensile stresses, the moment to resistance of the beam, is |
| A. | all the above |
| Answer» E. | |
| 22. |
If diameter of a reinforcement bar is , the anchorge value of the hook is |
| A. | 4 |
| B. | 8 |
| C. | 12 |
| D. | 16 |
| E. | none of these. |
| Answer» E. none of these. | |
| 23. |
If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is |
| A. | 0.3 H |
| B. | 0.4 H |
| C. | 0.5 H |
| D. | 0.6 H |
| E. | 0.7 H |
| Answer» F. | |
| 24. |
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement ( total settlement minus rebound) per tonne of test load should not exceed |
| A. | 10 mm |
| B. | 15 mm |
| C. | 20 mm |
| D. | 25 mm |
| E. | 30 mm |
| Answer» E. 30 mm | |
| 25. |
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. | zero |
| B. | none of these. |
| Answer» D. | |
| 26. |
Long and short spans of a two way slab are and and load on the slab acting on strips parallel to and be and respectively. According to Rankine Grashoff theory |
| A. | none of these. |
| Answer» E. | |
| 27. |
If the tendon is placed at an eccentricity below the centroidal axis of the lon-gitudial axis of a rectangular beam (sectional modulus and stressed load in tendon) the stress at the extreme top edge |
| A. | is increased by |
| B. | is increased by |
| C. | is decreased by |
| D. | remains unchanged. |
| Answer» D. remains unchanged. | |
| 28. |
The minimum thickness of a flat slab is taken |
| A. | 13 cm |
| B. | L/32 for end panels without drops |
| C. | L/36 for end panels without drops |
| D. | L/36 for interior panels without drop |
| E. | all the above. |
| Answer» F. | |
| 29. |
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/cm, the beam |
| A. | is safe in shear |
| B. | is safe with stirrups |
| C. | is safe with stirrups and inclined bars |
| D. | needs revision of section |
| Answer» E. | |
| 30. |
If the neutral axis of a T-beam is below the slab, the relationship between the flange width , depth of neutral axis , thickness of the slab , effective depth of the beam , gross area of tensile steel and the modular ratio may be stated as |
| A. | ( |
| B. | = |
| Answer» D. | |
| 31. |
In a combined footing if shear stress exceeds 5 kg/cm, the nominal stirrups provided are: |
| A. | 6 legged |
| B. | 8 legged |
| C. | 10 legged |
| D. | 12 legged |
| E. | none of these. |
| Answer» E. none of these. | |
| 32. |
If and are tread and rise respectively of a stair, then |
| A. | 2R + T = 60 |
| B. | R + 2T = 60 |
| C. | 2R + T = 30 |
| D. | R + 2T= 30 |
| E. | 3R + 27 = 30 |
| Answer» B. R + 2T = 60 | |
| 33. |
In a prestressed beam carrying an external load with a bent tendon is having angle of inclination θ and prestressed load . The net downward load at the centre is |
| A. | cos θ |
| B. | cos θ |
| C. | sin θ |
| D. | sin θ |
| E. | sin θ |
| Answer» E. sin θ | |
| 34. |
If is the load on a circular slab of radius , the maximum circumferential moment at the centre of the slab, is |
| A. | zero |
| B. | none of these. |
| Answer» D. | |
| 35. |
If the average bending stress is 6 kg/cm for M 150 grade concrete, the length of embedment of a bar of diameter according to I.S. 456 specifications, is |
| A. | 28 |
| B. | 38 |
| C. | 48 |
| D. | 58 |
| E. | 95 |
| Answer» E. 95 | |
| 36. |
A short column 20 cm x 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm and 300 kg/cm, the Safe load on the column, should not exceed |
| A. | 4120 kg |
| B. | 41, 200 kg |
| C. | 412, 000 kg |
| D. | none of these. |
| Answer» C. 412, 000 kg | |
| 37. |
The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm, safe shear stress 5 kg/cm and B.M. 24 mt, |
| A. | is safe in shear |
| B. | is unsafe in shear |
| C. | is over safe in shear |
| D. | needs redesigning. |
| Answer» C. is over safe in shear | |
| 38. |
In a beam the local bond stress , is equal to |
| A. | None of these. |
| Answer» B. | |
| 39. |
If and 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. | |
| D. | R-T |
| Answer» D. R-T | |
| 40. |
If the permissible compressive stress for a concrete in bending is kg/m, the modular ratio is |
| A. | 2800/ |
| B. | 2300/2 |
| C. | 2800/3 |
| D. | 2800/ |
| Answer» D. 2800/ | |
| 41. |
If and are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is |
| A. | d |
| B. | n |
| Answer» E. | |
| 42. |
If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond stress, the bond length is given by |
| A. | ft.d/4fb |
| B. | ( /4). (ft.d/fb) |
| C. | ft.d /fb |
| D. | ( /4). (ft.d3/fb) |
| Answer» B. ( /4). (ft.d/fb) | |
| 43. |
If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is |
| A. | WR /16 |
| B. | 2WR /16 |
| C. | 3WR /16 |
| D. | Zero |
| Answer» D. Zero | |
| 44. |
According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is |
| A. | 5 kg/cm2 |
| B. | 10 kg/cm2 |
| C. | 15 kg/cm2 |
| D. | 20 kg/cm2 |
| Answer» B. 10 kg/cm2 | |
| 45. |
If is the overall height of a retaining wall retaining a surcharge, the width of the base slab usually provided, is |
| A. | 0.3 H |
| B. | 0.4 H |
| C. | 0.5 H |
| D. | 0.7 H |
| Answer» E. | |
| 46. |
For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» C. 3 | |
| 47. |
The zone in which transverse bending is likely to occur may be obtained by drawing a line from the |
| A. | 30 |
| B. | 45 |
| C. | 60 |
| D. | None of these |
| Answer» C. 60 | |
| 48. |
If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept |
| A. | 4.5 m |
| B. | 4.0 m |
| C. | 3.5 m |
| D. | 3.0 m |
| Answer» B. 4.0 m | |
| 49. |
The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is |
| A. | 25 |
| B. | 30 |
| C. | 35 |
| D. | 40 |
| Answer» D. 40 | |
| 50. |
If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be. |
| A. | Straight below centroidal axis |
| B. | Parabolic with convexity downward |
| C. | Parabolic with convexity upward |
| D. | Straight above centroidal axis |
| Answer» C. Parabolic with convexity upward | |