RCC Structures Design MCQ

1.The toe projection of foundation slabs is taken

AAs one third of the base
BAs one sixth of overall height of the wall
CEqual to heel slab
DBelow ground surface

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Correct Answer : (A) As one third of the base

Explanation:

2.If ‘p’ is the net upward pressure on a square footing of side ‘b’ for a square column of side ‘a’, the maximum bending moment is given by

AB.M = pb (c - a)/4
BB.M = pb (b - a)²/4
CB.M = pb (b - a)²/8
DB.M = pb (b + a)/8

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Correct Answer : (C) B.M = pb (b - a)²/8

Explanation:

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

A0.25
B0.50
C0.70
D0.75

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Correct Answer : (B) 0.50

Explanation:

4.An R.C.C. column is treated as long if its slenderness ratio is greater than

A30
B35
C40
D50

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Correct Answer : (D) 50

Explanation:

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

A8
B10
C12
D16

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Correct Answer : (C) 12

Explanation:

6.If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm² and 1400 kg/cm² respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is

A0.496 %
B0.596 %
C0.696 %
D0.796 %

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Correct Answer : (C) 0.696 %

Explanation:

7.If A_c, A_sc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is

AσcAc + m σcAsc
Bσc(A - Asc) + m σcAsc
Cσc[A + (m - 1)Asc]
DAll the above

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Correct Answer : (D) All the above

Explanation:

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

AStraight below centroidal axis
BParabolic with convexity downward
CParabolic with convexity upward
DStraight above centroidal axis

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Correct Answer : (B) Parabolic with convexity downward

Explanation:

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

A2.5
B2.0
CLess than 2
DLess than 2.5

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Correct Answer : (A) 2.5

Explanation:

10.The width of the flange of a T-beam should be less than

AOne-third of the effective span of the T-beam
BDistance between the centers of T-beam
CBreadth of the rib plus twelve times the thickness of the slab
DLeast of the above

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Correct Answer : (D) Least of the above

Explanation:

11.The width of the flange of a L-beam, should be less than

AOne-sixth of the effective span
BBreadth of the rib + four times thickness of the slab
CBreadth of the rib + half clear distance between ribs
DLeast of the above

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Correct Answer : (D) Least of the above

Explanation:

12.The zone in which transverse bending is likely to occur may be obtained by drawing a line from the faces of the column making an angle θ° with horizontal where θ° is

A30°
B45°
C60°
DNone of these

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Correct Answer : (B) 45°

Explanation:

13.In a combined footing if shear stress does not exceed 5 kg/cm², the nominal stirrups provided are

A6 legged
B8 legged
C10 legged
D12 legged

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Correct Answer : (B) 8 legged

Explanation:

14.The shear reinforcement in R.C.C. is provided to resist

AVertical shear
BHorizontal shear
CDiagonal compression
DDiagonal tension

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Correct Answer : (D) Diagonal tension

Explanation:

15.The minimum number of main steel bars provided in R.C.C.

ARectangular columns is 4
BCircular columns is 6
COctagonal columns is 8
DAll the above

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Correct Answer : (D) All the above

Explanation:

16.The modular ratio ‘m’ of a concrete whose permissible compressive stress is ‘C’, may be obtained from the equation

Am = 700/3C
Bm = 1400/3C
Cm = 2800/3C
Dm = 3500/3C

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Correct Answer : (C) m = 2800/3C

Explanation:

17.If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is

Aw (R + T)/T
Bw √(R² + T²)/T
Cw √(R + T)/T
Dw (R/T)

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Correct Answer : (B) w √(R² + T²)/T

Explanation:

18.The minimum head room over a stair must be

A200 cm
B205 cm
C210 cm
D230 cm

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Correct Answer : (C) 210 cm

Explanation:

19.If jd is the lever arm and ΣO is the total perimeter of reinforcement of an R.C.C. beam, the bond stress at the section having Q shear force, is

AQ/2jdƩO
BQ/3jdƩO
CQ/jdƩO
D2 × Q/jdƩO

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Correct Answer : (C) Q/jdƩO

Explanation:

20.If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)

AM/100Q
BM/10√Q
C√(M/Q)
D√(M/100Q)

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Correct Answer : (D) √(M/100Q)

Explanation:

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RCC Structures Design MCQ

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1.The toe projection of foundation slabs is taken

2.If ‘p’ is the net upward pressure on a square footing of side ‘b’ for a square column of side ‘a’, the maximum bending moment is given by

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

4.An R.C.C. column is treated as long if its slenderness ratio is greater than

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

6.If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm² and 1400 kg/cm² respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is

7.If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is

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

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

10.The width of the flange of a T-beam should be less than

11.The width of the flange of a L-beam, should be less than

12.The zone in which transverse bending is likely to occur may be obtained by drawing a line from the faces of the column making an angle θ° with horizontal where θ° is

13.In a combined footing if shear stress does not exceed 5 kg/cm², the nominal stirrups provided are

14.The shear reinforcement in R.C.C. is provided to resist

15.The minimum number of main steel bars provided in R.C.C.

16.The modular ratio ‘m’ of a concrete whose permissible compressive stress is ‘C’, may be obtained from the equation

17.If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is

18.The minimum head room over a stair must be

19.If jd is the lever arm and ΣO is the total perimeter of reinforcement of an R.C.C. beam, the bond stress at the section having Q shear force, is

20.If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)

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7.If A_c, A_sc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is