Imparting Knowledge. Inculcating Values(Approved by AICTE, New Delhi; Affiliated to Anna University, Chennai & Accredited by NBA, New Delhi)Thalambur, Chennai 600 130DEPARTMENT OF TRAINING AND PLACEMENTCivil Technical test - 1

1. In a combined footing if shear stress exceeds 5 kg/cm2, the nominal stirrups provided are:a. 6 leggedb. 8 leggedc. 10 leggedd. 12 legged

2. The maximum area of tension reinforcement in beams shall not exceeda. 0.15%b. 1.5%c. 4%d. 1%

3. As per I.S. 456 - 1978, the pH value of water shall bea. Less than 6b. equal to 6c. not less than 6d. equal to 7

4. The minimum number of main steel bars provided in R.C.C.a. rectangular columns is 4b. circular columns is 6c. all the above.

5. Post tensioning systema. was widely used in earlier daysb. is not economical and hence not generally used c. is economical for large spans and is adopted now a daysd. none of these.

6. An R.C.C. column is treated as long if its slenderness ratio is greater thana. 30b. 35c. 40d. 50

7. The width of the flange of a T-beam should be less thana. 1/3 of the effective span of the T-beamb. distance between the centres of T-beamc. breadth of the rib plus twelve times the thickness of the slabd. least of the above.

8. A prestressed rectangular beam which carries two concentrated loadsWatL/3 from either end, is provided with a bent tendon with tensionPsuch that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum diphisa. b. c. d.

9. Pick up the correct statement from the following:a. A pile is a slender member which transfers the load through its lower end on a strong stratab. A pile is a slender member which transfers its load to the surrounding soilc. A pile is a slender member which transfers its load by friction

10. Cantilever retaining walls can safely be used for a height not more thana. 3 m b. 4 mc. 5 md. 6 m

11. IfWis the load on a circular slab of radiusR, the maximum circumferential moment at the centre of the slab, isa. b. c. d. zero12. If a bent tendon is required to balance a concentrated loadWat the centre of the spanL, the central dip h must be at leasta. b. c. d. 13. For M 150 mix concrete, according to I.S. specifications, local bond stress, isa. 5 kg/cm2b. 10 kg/cm2c. 15 kg/cm2d. 20 kg/cm214. If the average bending stress is 6 kg/cm2for M 150 grade concrete, the length of embedment of a bar of diameterdaccording to I.S. 456 specifications, isa. 28 db. 38 d c. 48 dd. 58 d

15. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater thana. 42 diameters from the centre of the columnb. 42 diameters from the inner edge of the columnc. 42 diameters from the outer edge of the columnd. 24 diameter from the centre of the column16. The diameter of longitudinal bars of a column should never be less thana. 6 mmb. 8mmc. 10 mmd. 12mm17. The design of a retaining wall assumes that the retained eartha. Is dryb. is free from moisturec. is not cohesivesd. consists of granular particlese. All the above

18. Dimensions of a beam need be changed if the shear stress is more thana. 10 kg/cm2b. 15 kg/cm2c. 20 kg/cm2d. 25 kg/cm2

19. The thickness of base slab of a retaining wall generally provided, isa. one half of the width of the stem at the bottomb. one-third of the width of the stem at the bottomc. one fourth of the width of the steam at the bottomd. width of the stem at the bottom

20. For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, isa. 1b. 2c. 3d. 4e. 5

21. Thickened part of a flat slab over its supporting column, is technically known asa. drop panelb. Capitalc. Column headd. None

22. An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal ata. 25b. 35c. 45d. 55

23. The effective span of a simply supported slab, isa. distance between the centres of the bearingsb. clear distance between the inner faces of the walls plus twice the thickness of the wallc. clear span plus effective depth of the slab

24. Pick up the incorrect statement from the following:a. In the stem of a retaining wall, reinforcement is provided near the earth sideb. In the toe slab of a retaining wall, rein forcement is provided at the bottom of the slabc. None of these

25. The minimum cube strength of concrete used for a prestressed member, isa. 50 kg/cm2b. 150 kg/cm2c. 250 kg/cm2d. 350 kg/cm2

26. The number of treads in a flight is equal toa. risers in the flightb. risers plus onec. risers minus one27. 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/cm2and 300 kg/cm2, the Safe load on the column, should not exceeda. 4120kgb. 41,200 kgc. 412,000kgd. none28. The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2and B.M. 24 mt,a. is safe in shearb. is unsafe in shearc. is over safe in shear29. In a beam the local bond stressSb, is equal toa. c. b.

30. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, isa. 5 kg/cm2b. 10 kg/cm2c. 15 kg/cm2d. 20 kg/cm2

31. A foundation rests ona. base of the foundationb. subgradec. Foundation soild. both (b)& (C)

32. For initial estimate for a beam design, the width is assumeda. 1/15th of spanb. 1/20th of spanc. 1/25th of spand. 1/30th of span

33. IfRandTare 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 widtha. R + Tb. T-Rc. R2+T2d. R-T

34. The advantage of a concrete pile over a timber pile, isa. no decay due to termitesb. no restriction on lengthc. higher bearing capacity d. all the above.

35. If the permissible compressive stress for a concrete in bending isCkg/m2, the modular ratio isa. 2800/Cb. 2300/2Cc. 2800/3Cd. 2800/C2

36. Ifdandnare the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, isa. db. nc. d.

37. To have pressure wholly compressive under the base of a retaining wall of widthb, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more thana. b/3b. b/4c. b/5 d. b/6

38. The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upona. breadth of the ribb. overall thickness of the rib c. span of the T-beamd. All the above

39. Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made bya. Rankine formulab. Marcus formulac. Rankine Grashoff formula

40. Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. ata. Supportsb. mid spanc. every sectiond. quarter span.

41. The transverse reinforcements provided at right angles to the main reinforcementa. distribute the loadb. resist the temperature stressesc. resist the shrinkage stressd. all the above. 42. The amount of reinformcement for main bars in a slab, is based upona. minimum bending momentc. maximum bending momentb. maximum shear force

43. If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, isa. 40b. 45c. 50d. 55

44. The percentage of minimum reinforcement of the gross sectional area in slabs, isa. 0.10%b. 0.12%c. 0.12%d. 0.18%

45. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, isa. 2.5b. 2.0c. less than 2d. less than 2.5

46. IfTandRare tread and rise respectively of a stair, thena. 2R + T = 60b. R + 2T = 60c. 2R + T = 30R + 2T= 30

47. Ifkis wobble correction factor,is coefficient of friction between the duct surface and the curve of tendon of radiusR, the tension ratio at a distancexfrom either end, isa. b. c. d.

48. In a prestressed beam carrying an external loadWwith a bent tendon is having angle of inclination and prestressed loadP. The net downward load at the centre isa. W - 2Pcos b. W - Pcos c. W - Psin d. W - 2Psin

49. The effective width of a column strip of a flat slab, isa. one-fourth the width of the panelb. half the width of the panelc. radius of the columnd. diameter of the column

50. High strength concrete is used in prestressed membera. to overcome high bearing stresses developed at the endsb. to overcome bursting stresses at the endsc. to overcome cracks due to shrinkaged. All the above