FAQ’s from IS Codes (IS456, IS875, IS1893, IS800…)

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1. As per IS 46 how many panel types are there for calculating moment coefficient in design of slabs

1. 7 Types table 26

2. 8 Types table 26

3. 9 Types Table 26

4. 10 Types table 26

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2. AS per IS 456 when is it not required to provide torsion reinforcement in slab

1. Annexure d – 1.9

2. Annexure d – 1.10

3. Annexure d – 1.11

4. Annexure d – 1.12

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3. As per IS 456 how do we provide tension reinforcement in slabs

1. Annexure a – 1.4 & 1.5

2. Annexure b – 1.4 & 1.5

3. Annexure c – 1.4 & 1.5

4. Annexure d – 1.4 & 1.5

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4. As per IS 456 what are the max bending moments in slabs in x and y directions

1. Annexure a – 1.1

2. Annexure b – 1.1

3. Annexure c – 1.1

4. Annexure d – 1.1

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5. In Which table of IS 456 is it expalined where do we find the value of max shear stress of concrete in beams with shear reinforcement

1. Table 5

2. Table 15

3. Table 20

4. Table 25

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6. In Which Clause of IS 456 is it expalined for assign the strength of structure what partial safety factors should we take for concrete and steel

1. 36.4.2.1

2. 36.5.2.1

3. 36.6.2.1

4. 36.7.2.1

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7. In Which table of IS 456 is it expalined what are the partial safety factors for loads for limit state of copalse and limit state of serviceability

1. Table 17

2. Table 18

3. Table 19

4. Table 20

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8. In Which Clause of IS 456 is it expalined what is limit state of claps and limit state of serviceability

1. 35.2

2. 36.2

3. 37.2

4. 38.2

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9. In Which Clause of IS 456 is it expalined what is the nominal reinforcement for footings greater than 1m depth

1. 33.5.1

2. 33.5.2

3. 34.5.2

4. 35.5.2

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10. In Which Clause of IS 456 is it expalined where do we calculate the highest bending moment for isolated footings

1. 34.2.2.2

2. 34.2.3.2

3. 34.2.4.2

4. 34.2.5.2

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11. In Which Clause of IS 456 is it expalined what is the min thickness at the edge of the footing

1. 34.1.1

2. 34.1.2

3. 35.1.2

4. 36.1.2

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12. In Which Clause of IS 456 is it expalined what are the min requirements for reinforcement of shear walls

1. 31.5

2. 31.7

3. 32.3

4. 32.5

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13. In Which Clause of IS 456 is it expalined what is the max effective height to thickness ratio in rcc walls

1. 32.2.3

2. 32.2.4

3. 32.2.5

4. 32.2.6

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14. In Which Clause of IS 456 is it expalined what is the critical section for shear in flat slabs

1. 30.4

2. 30.6

3. 31.4

4. 31.6

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15. In Which Clause of IS 456 is it expalined what is difference between drop and column head in flat slab

1. 30.2.2 & 3

2. 30.3.2 & 3

3. 31.2.2 & 3

4. 31.3.2 & 3

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16. As per IS 456 in which clause the length of the structure beyond which we provide expansion joint is explained

1. 25.2

2. 26.2

3. 27.2

4. 28.2

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17. In which clause of IS 456 expansion joints are explained

1. 25.1

2. 26.1

3. 27.1

4. 28.1

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18. Which clause do we use to understand the min reinforcment in slab to be provided as per IS 456

1. 23.5.2.1

2. 24.5.2.1

3. 25.5.2.1

4. 26.5.2.1

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19. Which clause of IS 456 do we use to understand the min shear reinforcment in beam

1. 26.5.1.6

2. 27.5.1.6

3. 28.5.1.6

4. 29.5.1.6

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20. Which clause of IS 456 is usded to understand side face reinforcment in beam

1. 26.4.1.3

2. 26.5.1.3

3. 26.4.2.3

4. 26.5.1.4

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21. In IS 456 in which Figure can we see the slab loads gets distributed on to beams?

1. Fig 7

2. Fig 24.5

3. Both a and b

4. None of the above

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22. For monolithic construction, where shall be the moments computed for the design of the members?

1. Face of the supports

2. Centre of the supports

3. 25cm from face of supports

4. 50cm from face of supports

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23. BM & SF Coefficients in Table 12 & 13 of IS456 are valid for frames with..

1. 3 spans or more

2. 4 Spans or more

3. 1 Span

4. Fixed Beam

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24. Which clause in IS456 explains about precautions to be taken for lateral sway for structures?

1. 20.1

2. 20.3

3. 20.5

4. 20.7

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25. What is the code concerned to live loads consideration on structures?

1. IS875-1

2. IS875-2

3. IS875-3

4. IS875-5

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26. What are the clauses for inspection and testing of structures

1. 17

2. 18

3. 16

4. All of the above

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27. Clause for stripping time of formworks for various structural elements in IS456?

1. 11.1

2. 11.3.1

3. 11.2.1

4. 11.1.1

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28. What is the minimum time of mixing of concrete?

1. 2min

2. 3min

3. 4min

4. 1min

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29. What is the minimum grade of concrete to be used in RCC for structures along the sea cost as per IS 456

1. M20

2. M25

3. M30

4. M35

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30. What is the clause concerned to curing of concrete as per IS 456?

1. 13.2

2. 13.3

3. 13.4

4. 13.5

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31. What is the table concerned to water cement ratios for different grades of concrete with 20mm aggregate?

1. Table 4

2. Table 5

3. Table 6

4. Table 7

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32. What is the clause concerned to discussion on the nominal cover to reinforcment in IS456?

1. 25.4

2. 26.4

3. 27.4

4. 28.4

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33. What is the formula for modules fo elasticity of concrete as per IS456?

1. E = 4500 SQRT FCK

2. E = 5000 SQRT FCK

3. E = 5500 SQRT FCK

4. E = 4000 SQRT FCK

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34. What is the table that specifies the possible grades of concrete as per IS 456?

1. Table 1

2. Table 2

3. Table 3

4. Table 4

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35. What is the clause concerned to usage of sea water for concrete mixing as per IS 456?

1. Clause 5.4.3

2. Clause 5.3.3

3. Clause 5.2.3

4. Clause 5.1.3

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36. Which type of water is to be used for mixing concrete as per IS 456?

1. Bore water

2. Sea Water

3. Potable Water

4. Clean Mineral water

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37. What are the two popular Grades of Cement?

1. 53 and 34 Grade

2. 34 and 43 Grade

3. 43 and 53 grade

4. 53 and 63 Grade

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38. The diameter of main bars in R.C.C. columns, shall not be less than

1. 6 mm

2. 8 mm

3. 10 mm

4. 12 mm

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39. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds

1. 10

2. 12

3. 20

4. 25

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40. The diameter of ties in column should be

1. More than or equal to one fourth of diameter of main bar

2. More than or equal to 5mm

3. More than 5 mm but less than one-fourth of diameter of main bar

4. More than one-fourth of diameter of main bar and not less than 5 mm

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41. Which IS code gives details regarding acid-resistant bricks?

1. IS 4832

2. IS 4860

3. IS 5766

4. IS 5318

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42. Which IS code is used to refer details regarding measurement of building and civil engineering works?

1. IS 1200

2. IS 2502

3. IS 1786

4. IS 800

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43. Which is the most basic IS code for a Civil engineering designs?

1. IS 567

2. IS 456

3. IS 455

4. IS 383

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44. A continuous beam is deemed as a deep beam when the ratio of effective span to overall depth (l/d) is less than?

1. 1.5

2. 2

3. 2.5

4. 3

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45. Maximum distance between expansion joints in structures as per IS:456-1978 is?

1. 20 m

2. 30 m

3. 45 m

4. 60 m

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46. Minimum pitch of transverse reinforcement in a column is?

1. The least lateral dimension of the member

2. Sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

3. Forty-eight times the diameter of transeverse reinforcement

4. Least of the above three values

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47. The percentage of reinforcement in slabs, when HYSD bars are used should not be less than?

1. 0.15

2. 0.12

3. 0.3

4. 1

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48. The ratio of the diameter of reinforcing bars and the slab thickness is?

1. 1/4

2. 1/5

3. 1/6

4. 1/8

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49. The minimum cover in a slab should neither be less than the diameter of bar nor less than

1. 10 mm

2. 15 mm

3. 25 mm

4. 13 mm

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50. According to IS:456-1978, minimum slenderness ratio for a short column is?

1. Less than 12

2. Less than 18

3. Between 18 and 24

4. More than 24

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