IS 456: 2000 Code Books Expected Questions in AE/JDO Exams

1. Minimum amount of high strength deformed bar reinforcement used in solid slabs shall not be less than _____ of the total cross-sectional area of the slab according to IS: 456-2000.

(a) 0.25%

(b) 0.12%

(c) 0.20%

(d) 0.15%

Answer: b

2. According to IS: 456-2000 recommendations, the maximum depth of stress block for balanced section of a beam of effective depth “d” for mild steel reinforcement is

(a) 0.43 d

(b) 0.53 d

(c) 0.68 d

(d) 0.46 d

Answer: b

3. The calculated spacing of vertical stirrups on a beam as per IS:456 is

(i) Less than 0.75 d

(ii) Less than 450 mm

(iii) Less than 300 mm

(iv) Greater than 60 mm

(a) (i) and (iii)

(b) (i), (ii) and (iv)

(c) (i) and (ii)

(d) (i), (iii) and (iv)

Answer: a

4. The shape of idealized stress-strain curve for concrete as prescribed by IS 456-2000 is

(a) Rectangular

(b) Parabolic

(c) Rectangular-Parabolic

(d) None of these

Answer: c

5. The minimum grade of reinforced concrete in sea water as per IS 456 2000 is

(a) M15

(b) M20

(c) M30

(d) M40

Answer: c

6. The tensile strength of concrete in flexure as per IS 456 is

(a) $0.6 \sqrt{f_{c k}}$

(b) $0.7 \sqrt{f_{c k}}$

(c) $0.75 \sqrt{f_{c k}}$

(d) $0.9 \sqrt{f_{c k}}$

Answer: b

7. As per IS 456-2000, in the absence of test data, the approximate value of the total strain for design may be taken as

(a) 0.0004

(b) 0.0001

(c) 0.0002

(d) 0.0003

Answer: d

8. According to IS 456-2000, side-face reinforcement should be provided when the depth of web of a beam exceeds

(a) 650 mm

(b) 700 mm

(c) 725 mm

(d) 750 mm

Answer: d

9. As per IS:456, the effective length of cantilever beam shall be taken as:

(a) Clear span

(b) Clear span + effective depth/2

(c) Clear span + effective depth

(d) Clear span + effective width

Answer: b

10. According to IS 456:2000, what should be the nominal cover to reinforcement for footings?

(a) 45 mm

(b) 50 mm

(c) 30 mm

(d) 20 mm

Answer: b

11. According to IS: 456-2000, the maximum reinforcement in a column is:

(a) 4%

(b) 2%

(c) 6%

(d) 8%

Answer: c

12. The minimum clear cover (in mm) for the main reinforcement in column, according to IS 456-2000 is

(a) 20

(b) 25

(c) 40

(d) 50

Answer: c

13. As per IS 456-2000, which one of the following correctly expresses the modulus of elasticity of concrete? (read with the relevant units)

(a) $E_c = 0.7 \sqrt{fck}$

(b) $E_c = 500 \sqrt{fck}$

(c) $E_c = 5000 \sqrt{fck}$

(d) $E_c = 5700 \sqrt{fck}$

Answer: c

14. According to IS: 456, the thickness at the edge on top of piles for a footing on the piles should not be less than

(a) 100 mm

(b) 150 mm

(c) 200 mm

(d) 300 mm

Answer: d

15. As per IS 456: 2000, the vertical deflection limits in a cantilever beam may generally be assumed to be satisfied provided that (span/depth) ratio does not exceed

(a) 26

(b) 20

(c) 7

(d) 3

Answer: c