RCC Mcqs

Practice Quiz On RCC Mcqs

30 Marks

1 / 30

The toe projection of foundation slabs is taken

As one third of the base

As one sixth of overall height of the wall

Equal to heel slab

Below ground surface

2 / 30

The effective span of a simply supported slab, is

Distance between the centers of the bearings

Clear distance between the inner faces of the walls plus twice the thickness of the wall

Clear span plus effective depth of the slab

None of these

3 / 30

A raft foundation is provided if its area exceeds the plan area of the building by

10%

20%

40%

50%

4 / 30

The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is

5 / 30

If diameter of a reinforcement bar is d, the anchorage value of the hook is

12d

16d

6 / 30

The breadth of a ribbed slab containing two bars must be between

6 cm to 7.5 cm

8 cm to 10 cm

10 cm to 12 cm

12 cm to 15 cm

7 / 30

The diameter of the column head support a flat slab, is generally kept

0.25 times the span length

0.25 times the diameter of the column

4.0 cm larger than the diameter of the column

5.0 cm larger than the diameter of the column

8 / 30

In a slab, the pitch of the main reinforcement should not exceed its effective depth

Three times

Four times

Five times

Two times

9 / 30

On piles, the drop must be at least

80 cm

100 cm

120 cm

140 cm

10 / 30

If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be.

Straight below centroidal axis

Parabolic with convexity downward

Parabolic with convexity upward

Straight above centroidal axis

11 / 30

The weight of a foundation is assumed as

5% of wall weight

7% of wall weight

10% of wall weight

12% of wall weight

12 / 30

For M 15 grade concrete (1 : 2 : 4) the moment of resistance factor is

0.87

8.50

7.50

5.80

13 / 30

The maximum ratio of span to depth of a cantilever slab, is

14 / 30

In a pre-stressed member it is advisable to use

Low strength concrete only

High strength concrete only

Low strength concrete but high tensile steel

High strength concrete and high tensile steel

15 / 30

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

10 mm

12 mm

14 mm

16 mm

16 / 30

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

6 mm

8 mm

10 mm

12 mm

17 / 30

Steel beam theory is used for

Design of simple steel beams

Steel beams encased in concrete

Doubly reinforced beams ignoring compressive stress in concrete

Beams if shear exceeds 4 times allowable shear stress

18 / 30

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

6 mm

8 mm

10 mm

12 mm

19 / 30

Enlarged head of a supporting column of a flat slab is technically known as

Supporting end of the column

Top of the column

Capital

Drop panel

20 / 30

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

2.5

2.0

less than 2

less than 2.5

21 / 30

Dimensions of a beam need be changed if the shear stress is more than

10 kg/cm2

15 kg/cm2

20 kg/cm2

25 kg/cm2

22 / 30

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

23 / 30

Spacing of stirrups in a rectangular beam, is

Kept constant throughout the length

Decreased towards the centre of the beam

Increased at the ends

Increased at the centre of the beam

24 / 30

For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is

25 / 30

Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by

Rankine formula

Marcus formula

Rankine Grashoff formula

Grashoff formula

26 / 30

In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at

Less loaded column

More loaded column

A point of the maximum shear force

A point of zero shear force

27 / 30

The maximum permissible size of aggregates to be used in casting the ribs of a slab, is

5 mm

7.5 mm

10 mm

15 mm

28 / 30

The ratio of the breadth to effective depth of a beam is kept

0.25

0.50

0.70

0.75

29 / 30

As the percentage of steel increases

Depth of neutral axis decreases

Depth of neutral axis increases

Lever arm increases

Lever arm decreases

30 / 30

The minimum clear cover for R.C.C. columns shall be

Greater of 40 mm or diameter

Smaller of 40 mm or diameter

Greater of 25 mm or diameter

Smaller of 25 mm or diameter

Your score is

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

A) 6 mm

B) 8 mm

C) 10 mm

D) 12 mm

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

A) 2.5

B) 2.0

C) less than 2

D) less than 2.5

The maximum ratio of span to depth of a cantilever slab, is

A) 8

B) 10

C) 12

D) 14

C) 12

In a slab, the pitch of the main reinforcement should not exceed its effective depth

A) Three times

B) Four times

C) Five times

D) Two times

A) Three times

The breadth of a ribbed slab containing two bars must be between

A) 6 cm to 7.5 cm

B) 8 cm to 10 cm

C) 10 cm to 12 cm

D) 12 cm to 15 cm

B) 8 cm to 10 cm

Spacing of stirrups in a rectangular beam, is

A) Kept constant throughout the length

B) Decreased towards the centre of the beam

C) Increased at the ends

D) Increased at the centre of the beam

If diameter of a reinforcement bar is d, the anchorage value of the hook is

A) 4d

B) 8d

C) 12d

D) 16d

The effective span of a simply supported slab, is

A) Distance between the centers of the bearings

B) Clear distance between the inner faces of the walls plus twice the thickness of the wall

C) Clear span plus effective depth of the slab

D) None of these

B) Clear distance between the inner faces of the walls plus twice the thickness of the wall

The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is

A) 25

B) 30

C) 35

D) 40

C) 35

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

A) 6 mm

B) 8 mm

C) 10 mm

D) 12 mm

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