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 how do we take care of negative moments at a discontinues edge of a slab panel

1. Annexure d – 1.6

2. Annexure d – 1.7

3. Annexure d – 1.8

4. Annexure d – 1.9

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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. In Which Clause of IS 456 is it expalined how do we calculate spacing of shear reinforcement for vertical stirrups

1. 40.2

2. 40.4

3. 40.6

4. 40.8

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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 what is the formula for nominal shear stress in beams of uniform depth

1. 39.1

2. 40.1

3. 41.1

4. 42.1

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7. In Which Clause of IS 456 is it expalined what are the assumptions for design using limit state of collapse for compression

1. 37.1

2. 38.1

3. 39.1

4. 40.1

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8. In Which Clause of IS 456 is it expalined what are the assumptions for design using limit state of collapse for flexure

1. 36.1

2. 37.1

3. 38.1

4. 29.1

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9. In Which Clause of IS 456 is it expalined how do we design slab spacing in two directions

1. 36.1.2

2. 37.1.2

3. 38.1.2

4. 39.1.2

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10. In Which Clause of IS 456 is it expalined what is redistribution of moments in continues beams and frames

1. 35.1.1

2. 37.1.1

3. 39.1.1

4. 41.1.1

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11. 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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12. In Which Clause of IS 456 is it expalined what is characteristic strength of concrete

1. 36.1

2. 36.4

3. 37.1

4. 37.4

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13. 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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14. In Which Clause of IS 456 is it expalined what is the min thickness of rcc wall

1. 31.1

2. 32.1

3. 33.1

4. 34.1

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15. As per IS 456 in which clause it is explained how to provide positive reinforcement in deep beam

1. 29.3.1

2. 29.3.2

3. 29.3.3

4. 29.3.4

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16. What is the min longitudinal reinforcment in caes of pedistals in IS 456

1. 0.10% of pedistal CS Area

2. 0.15% of pedistal CS Area

3. 0.20% of pedistal CS Area

4. 0.12% of pedistal CS Area

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17. What is the min dia of longitudinal bar for columns as per IS 456

1. 10 mm

2. 11 mm

3. 12 mm

4. 13 mm

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18. What is the max longitudinal reinforcment for columns in IS 456

1. 26.5.3.1

2. 26.5.3.2

3. 26.5.3.3

4. 26.5.3.4

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19. As per IS 456 Which Clause do we use to find the max area of tension reinforcemnt in beams

1. 26.5.1.1.A

2. 26.5.1.1.B

3. 26.5.1.1.C

4. Both a and c

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20. Which clause of IS 456 do we use to understand the max distance between the bars in tension

1. 24.3.3

2. 25.3.3

3. 26.3.3

4. 27.3.3

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21. As per IS 456 which clause do we use to understand the min spacing between the individual bars

1. 26.3.2.A

2. 26.3.2.B

3. 26.3.2.C

4. All of the above

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22. 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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23. What are the limiting values of the span/depth ratio to be satisfied for horizontal deflection of beam/slab for spans over 10m, as per IS 456 which clause do we use?

1. 23.2.1.B

2. 24.2.1.B

3. 25.2.1.B

4. 26.2.1.B

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24. In which clause (Figure number) the minimum dimensions of RCC members are discussed in IS456?

1. Fig 1

2. Fig 2

3. Fig 3

4. Fig 4

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25. In which clause “Design Load” is defined in IS456

1. 19.7

2. 19.8

3. 19.9

4. 19.1

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26. What should be the curing period to achieve 90% strength?

1. 7 days

2. 28 days

3. 18 days

4. 12 days

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27. 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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28. 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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29. What is the cluase that talks on the Durabilty of Concrete in IS 456?

1. 6

2. 7

3. 8

4. 9

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30. What is the relation between tensile strength and compressive strength of concrete in IS 456

1. Tensile Strength Fcr = 0.75 SQRT FCK

2. Tensile Strength Fcr = 0.77 SQRT FCK

3. Tensile Strength Fcr = 0.9 SQRT FCK

4. Tensile Strength Fcr = 0.7 SQRT FCK

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31. What is the table in IS 456 concerned to usage of Grades of concrete for plain and reinforced Concrete?

1. Table 5 (IS 456)

2. Table 2 (IS 456)

3. Table 4 (IS 456)

4. Table 1 (IS 456)

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32. What should be the PH value of water used for mixing concrete as per IS 456?

1. Should not be less than 6

2. Should not be less than 4

3. Should not be less than 3.5

4. Should not be more than 7

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33. What is the size of the aggregate mostly used for concreting?

1. 25 mm

2. 15 mm

3. 40 mm

4. 20 mm

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34. 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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35. The diameter of longitudinal bars of a column should never be less than..

1. 6 mm

2. 8 mm

3. 10 mm

4. 12 mm

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36. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is

1. 2.5

2. 2

3. Less than 2

4. Less than 2.5

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37. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is

1. 10 mm

2. 12 mm

3. 14 mm

4. 16 mm

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38. According to whitney’s theory, the maximum depth of concrete stress block in a balanced RCC beam section of depth “d” is..

1. 0.43 d

2. 0.537 d

3. 0.68 d

4. 0.85 d

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39. P = Pi*2 E I /L*2 is the buclking load for column with..!

1. Both the ends are fixed

2. Both the ends are hinged

3. One end is fixed and other end is free

4. One end is fixed and other end is hinged

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40. What is slenderness ratio of a long column?

1. Area of cross-section divided by radius of gyration

2. Area of cross-section divided by least radius of gyration

3. Radius of gyration divided by Area of cross-section

4. Length of column divided by least radius of gyration

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41. How many parts (books) does IS code 875 contain?

1. 5

2. 6

3. 7

4. 8

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42. The slab is designed as one way if the ratio of long span to short span is?

1. less than 1

2. Between 1 and 1.5

3. Between 1 and 2

4. Greater than 2

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43. 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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44. The percentage of reinforcement in slabs, when Mild steel bars are used should not be less than?

1. 0.15

2. 0.12

3. 0.3

4. 1

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45. 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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46. For a longitudinal reinforcement bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than?

1. 15 mm

2. 25 mm

3. 30 mm

4. 40 mm

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47. 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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48. According to IS:456-1978, the cblumn or the strut is the member whose effective length is greater than?

1. The least lateral dimension

2. 2 times the least lateral dimension

3. 3 times the least lateral dimension

4. 4 times the least lateral dimension

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49. According to IS:456-1978, the fiexural strength of concrete is?

1. Directly proportional to compressive strength

2. Inversely proportional to compressive strength

3. Directly proportional to squre root of compressive strength

4. Inversely proportional to squre root of compressive strength

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50. Minimum grade of concrete to be used in reinforced concrete as per IS:456-2002 is?

1. M15

2. M20

3. M10

4. M25

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