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Concrete-structures Questions Set 13:

Quiz Mode

According to IS 456:2000, the partial material safety factor for steel in the limit state method of design is

1.5

1.15

0.87

Solution:

For M25 concrete with creep coefficient of 1.5,the long term static modulus of elasticity as per provisions of IS-456-2000 is (MPa):

Solution:

The minimum percentage of steel required in a rectangular beam reinforced with Fe 500 steel to avoid sudden failure is

0.21%

0.17%

0.34%

0.19%

Solution:

The load-carrying capacity of a column designed by the working stress method is 500 kN. The collapse load of the column is:

500.0 kN

662.5 kN

750.0 kN

1100.0 kN

Solution:

Determine the depth of the neutral axis of a beam with dimensions 250 mm × 400 mm, reinforced with 3 bars of 20 mm diameter. Use M20 concrete and Fe415 steel.

200 mm

189.04 mm

210 mm

250 mm

Solution:

As per IS 456: 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced concrete beams of rectangular cross- section (considering effective depth in the calculation of area) using Fe 500 grade of steel is_______.

Solution:

As per IS 456:1978, the effective depth of reinforced concrete flanged T-beam under compression, if L is the distance between adjacent zero moment points, b is the breadth of the rib, and D is the thickness of the flange, is

L/6 + b + 6D

L/6 + 6D

L/6 + b

L + 6D

Solution:

Which of the following statements is true regarding the properties of concrete?

Concrete is equally good in compression and tension.

Concrete is good in compression and weak in tension.

Concrete is good in tension and weak in compression.

Concrete is weak in both compression and tension.

Solution:

A short RC column 300 mm wide and 500 mm deep is reinforced with bars such that the area of steel reinforcement A_st = 1884.96 mm². Determine the bending moment M_u about an axis bisecting the depth when the column is subjected to an axial load P_u = 800 kN. Assume M20 concrete and Fe415 steel. Also, the value of d' = 50 mm. Use SP 16 code.

150 kNm

210 kNm

250 kNm

360 kNm

Solution:

Which of the following statements is incorrect?

The concrete is strong in compression and weak in Tension

The cubes and cylinders are stored under water or placed in constant temperature at 100% relative humidity before testing to enhance workability.

The lateral ties are provided in columns to resist lateral buckling.

The workability of Concrete is measured by Slump test.

Concrete-structures Questions Set 13:

According to IS 456:2000, the partial material safety factor for steel in the limit state method of design is

Solution:

For M25 concrete with creep coefficient of 1.5,the long term static modulus of elasticity as per provisions of IS-456-2000 is (MPa):

Solution:

The minimum percentage of steel required in a rectangular beam reinforced with Fe 500 steel to avoid sudden failure is

Solution:

The load-carrying capacity of a column designed by the working stress method is 500 kN. The collapse load of the column is:

Solution:

Determine the depth of the neutral axis of a beam with dimensions 250 mm × 400 mm, reinforced with 3 bars of 20 mm diameter. Use M20 concrete and Fe415 steel.

Solution:

As per IS 456: 2000, the minimum percentage of tension reinforcement (up to two decimal places) required in reinforced concrete beams of rectangular cross- section (considering effective depth in the calculation of area) using Fe 500 grade of steel is_______.

Solution:

As per IS 456:1978, the effective depth of reinforced concrete flanged T-beam under compression, if L is the distance between adjacent zero moment points, b is the breadth of the rib, and D is the thickness of the flange, is

Solution:

Which of the following statements is true regarding the properties of concrete?

Solution:

Solution:

Which of the following statements is incorrect?

Solution:

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