Most asked in Questions on Interview in Shapoorji Pallonji

1. Height of parapet wall should be 1m.

2.Thickness of dpc 2.5cm or 1 inch

3. Height of building = 3.15 m

4. Height of window = 2.1m

5. One bag of cement = 1.25 cubic feet=0.0347 m3

6. Weight of one Cement bag = 50kg.

7. Minimum thickness of slab= 125mm.

8. No.of cement bags in l m3 = 28.8 bags

9. Lintel thickness = 15cm 

10. Lintel is provided at 2.4m in case of brick wall.

11. Minimum diameter of bass used in slab = 8mm.

12. Minimum diameter of bass used in column = 12 mm.

13. Minimum diameter of bass in

Dowel bars=12 mm.

14. Max Φ bars in slab = 1/8 x thickness of slab

15. Maximum chair Spacing = 1m

16. Dimensional tolerance of cube = ±2mm.

17. Max water absorption of first class brick= 15% of its dry wt.

18. Initial setting time of cement = 30min.

19. Final Setting time = 10 hr = 600 minutes.

20. Opc full from = Ordinary portland Cement. DPR: Detailed project Report.

21.Unit weight

RCC = 25 kN/m3 = 25000 N/m?

PCC = 24 kN/m = 24,000 N/m3.

Steel = 7850 kg/m3.

22. 1 Gallon = 3.78 liter

23. Minimum no. of bars.

For Square Columns or rectangular= 4 bars.

For circular column = 6 bars.

24. Standard sand in India is obtained from Ennore. Tamil Nadu.

25. 1 yard = 3 feet

26. Weight of Steel = D²/162 kg/m

weight of Steel - D²/533 kg/ft

27. Slope of Stair case = 25-40°

28. Size of Concrete testing cube

= 150 x 150 x 150 mm.

29. Concrete cube is filled in 3 layers.

30. Slump cone is filled in 4 Layers.

31. Cement should be used within three

months of manufacturing.

32. minimum thickness of shear wall = 150mm.

Max. thickness of Shear wall = 400 mm.

33. universal testing machine used for compression test of Concrete & tensile test of Steel reinforcement.

34. Minimum Curing period.

1.7days Normal weather condition

2. l0 days. → Dry Hot weather condition

35. Minimum percentage of Steel in column =0.8% of Gross area.

Max percentage of steel in column= 6% of Gross area.

36. Nominal Cover

Footing = 50mm

Column = 40mm.

Slab = 20 mm

Beam = 25mm.

37. lapping is not allowed in bars

of Diameter 36 mm Welding is preffered .

38. No. of Stirrups = Clear span/c/c spacing+1

39. R.C.C is affected by water.

because of corrossion of Reinforcement bars

40. P.C.C is not affected by the water .

41. Max Free fall of Concrete = 1.5m.

42. LEAST COUNT:-

com PASS = 30' (30 minutes)

Dumpy level = 5mm

Auto level = 5mm.

Theodolite - 20" (20 seconds)

43. Air voids left in concrete is called as HONEY COMBING.

44. The transverse reinforcement

of column are called TIES

45. The transverse Reinforcement in beams are called (STRIPPUS)

46. Full from of TMT, TMX, SD, HYSD, CTD

TMT - Thermomechanically treated Bars.

TMX - Thermax powered Bass.

SD → Super ductile. Bars.

HYSD → High yield strength

Deformed bass.

CTD - Cold twisted deformed bars.

47. Angle of staircase = 25°- 40°

48. Riser = 150mm - 200mm.

Tread = 250mm - 300mm.

50. minimum Hook length = 9D

51. STANDARD Size of Brick = 19 x 9 x 9 mm.

52. MODULAR SIZE OF BRICK

= 20 x 10 x 10 mm.

53. No. of bricks in l m3 = 500 bricks.

54. No. of bricks in 230mm brick wall

in 1 cubic meter = 496 bricks (including wastage)

55. No. of bricks in 115mm thick wall for

1sq.m = 56 Bricks.

56. 8-12 kg of binding wire is used per

metric tonne of steel.1ooo kg = 8kg-12kg

57. Cement ingredients are

burnt at 1400°C temperature.

58. 1 BHK stand for 1 Bed boom, 1 HALL,1 KITCHEN

59. Short columns fail in Crushing.

60. long columns fail in Buckling.

61. Intermediate column scan fail both in Buckling & Crushing.

62. Lapping in tension. L=5OD to 60 D.

63. Lapping in compression L=24D

64. Strength of reinforcement shouldn't be less than 15% of its designated strength.

65. compressive strength of bricks.

First Class Bricks = 105kg /cm²

Second class Bricks = 70kg/cm²

3rd class Bricks = 35 kg/cm²

Fire Bricks = 125 kg /cm²

66. DE SHUTTERING TIME FOR DIFFERENT MEMBERS RCC MEMBER TIME

1. columns & Rcc walls 16- 24 hrs.

2. Soffit Formwork for slabs 3 days (Props are se fixed after Removal)

3. Beams Spaning 4.5m (props are refixed)

4. Beams Spaning more than 4.5m 14 days.

5. Arches Spaning 6 m. 

6. Arches Spaning more than 6m 21 days.

67. Hook angle of Stirrup should be 135°.

68. The longitudinal bars should be bent

at 90° & & bent length Shouldn't

be less than 18" or l.5 ft.

69. End hook for longitudinal bar is Should

be 90°.

70. Not more than 50% of bars should be lapped in a zone.

71. PH of water used in concrete should

not be less than 6.

72. Low heat cement is used in Dams

& Abutment. & Retaining walls.

Because healy Structures are prone

to thermal cracks.

73.CEMENT : SAND : AGGREGATE ratio

for different Grades of Conocrete

            C.  S.  A. 

  M7.5 1 : 4 : 8    M (7.5 N/mm)

  M10  1 : 3 : 6 

  M15  1 : 2 : 4

  M20 1 : 1.5 : 3

  M25 1 : 1 : 2

74. Segregation is seperation of cement

Sand & aggregates. Water cement ratio 0.4

1. This is caused due to improper water

Cement ratio.

2. It is also caused when concrete is

poured above 1.5m high. 188

75. Bleeding :when water comes out

of Freshly made concrete it is

Called as bleeding of concrete.

76. Retarder is an admixture added

to concrete which keeps concrete workable for longer time It increases Setting time of concrete. eg Sugar' is a retarder.Gypsum

78. Deflection means temporary displacement

79. Deformation is permanant displacement

80. The ratio of weight of water to the

weight of cement in concrete is called

as water cement ratio.

W/C ratio = weight of water/weight of cement.= 0.4

What is Slump :-

It can be defined as difference between height of the concrete before removing slump cone (mould) and height of the concrete after removing of slump cone as measured during concrete slump test.

1. Collapse slump : In this case, fresh concrete collapses completely. Mix is too wet or high workability mix , slump test isn’t appropriate for such mix.
2. Shear Slump: If one-half of the cone slides down in an inclined plane, it is called a shear slump. It is an indication of lack of cohesion of the mix. Again perform the experiment to avoid shear slump .
3. True Slump: Mix has high stiff consistency. In a true slump concrete just subsides shortly and more or less maintain the mould shape. This type of slump is most desirable.
4. Zero Slump: If concrete maintains the actual shape of the mould, it is called zero slump which represents stiff, consistent and almost no workability.
   
   Slump value for various type of construction: 

As per Indian Standard Code 456

The Slump Value depends upon the placing condition (Type of Structure) and the values are given below:

86. Tensile strength of concrete 0.7 √ Fck.

flexural strength. fck = 20 N/mm Mao

87. modulus of elasticity of Concrete

Ec= √5000 fck

88. Characteristic strength

Strength below which not more than 5% of test results are expected to fall. 100 cubes

92. In mixer machine Concrete Should

be mixed for 2 - 3 minutes,

93 . STORAGE OF CEMENT:

1. Cement should be stored in dey places.

2. 200 mm Away from floor. (in a platform)

3. 300mm Away from walls.

4. Not more than 10 bags stacked

5. Away from moisture & chemicals.

94. water absorption for bricks 1st class

should be < 20%

95. water absorption should be < 5%

for the building stones.

96. F.O.S for Steel = 1.15

97. F.O.S For Concrete = 1.5

98. Youngs modulus of Steel

Es = 2 x 10⁵ N/mm²

99. Types of steel

1. mild steel Fe 250 is characteristic Strength fy= 250 N/mm²

100. HYSD (High yield Strength deformed

bass)

1 . Fe 415.    fy=415 mm

2 . Fe 500.    fy=500 mm