RCC Structures Design MCQs

RCC Structures Design MCQs

Try to answer these 20 RCC Structures Design MCQs and check your understanding of the RCC Structures Design subject.
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1: Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by

A.   Grashoff formula

B.   Rankine formula

C.   Rankine Grashoff formula

D.   Marcus formula

E.   Rankine-Marcus formula

2: For stairs spanning horizontally, the minimum waist provided is

A.   10 cm

B.   4 cm

C.   8 cm

D.   12 cm.

E.   6 cm

3: As per I.S. 456 - 1978, the pH value of water shall be

A.   Equal to 6

B.   Less than 6

C.   Equal to 7

D.   Not less than 6

4: If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a

A.   None of these

B.   Cantilever beam

C.   Continuous beam

D.   Simply supported beam

5: The weight of a foundation is assumed as

A.   7% of wall weight

B.   12% of wall weight

C.   10% of wall weight

D.   5% of wall weight

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

A.   0.696 %

B.   0.596 %

C.   None of these

D.   0.796 %

E.   0.496 %

7: The width of the flange of a T-beam should be less than

A.   One-third of the effective span of the T-beam

B.   Least of these

C.   Distance between the centres of T-beam

D.   Breadth of the rib plus twelve times the thickness of the slab

8: High strength concrete is used in prestressed member

A.   All these

B.   To ovecome bursting stresses at the ends

C.   To overcome high bearing stresses developed at the ends

D.   To provide high bond stresses

E.   To overcome cracks due to shrinkage

9: For M 150 mix concrete, according to I.S. specifications, local bond stress, is

A.   25 kg/cm2

B.   10 kg/cm2

C.   15 kg/cm2

D.   5 kg/cm2

E.   20 kg/cm2

10: An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40, 000 kg axially, the stress is

A.   250 kg/cm2

B.   100 kg/cm2

C.   175 kg/cm2

D.   49.9 kg/cm2

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

A.   30

B.   40

C.   50

D.   35

E.   60

12: If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is

A.   48 d

B.   38 d

C.   58 d

D.   95 d

E.   28 d

13: An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 metres and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is

A.   21.5 kg/cm2

B.   8.3 kg/cm2

C.   11.4 kg/cm2

D.   7.6 kg/cm2

14: Thickened part of a flat slab over its supporting column, is technically known as

A.   None of these

B.   Column head

C.   Capital

D.   Drop panel

15: The advantage of reinforced concrete, is due to

A.   Moulding in any desired shape

B.   Economy because of less maintenance cost

C.   All these

D.   Monolithic character

E.   Fire-resisting and durability

16: The length of lap in tension reinforcement should not be less than the bar diameter x (actual tension / four times the permissible average bond stress) if it is more than

A.   18 bar diameters

B.   36 bar diameters

C.   24 bar diameters

D.   30 bar diameters

17: The live load to be considered for an inaccessible roof, is

A.   200 kg/m2

B.   150 kg/cm2

C.   75 kg/m2

D.   Nil

18: According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than

A.   40 cm

B.   50 cm

C.   20 cm

D.   75 cm

E.   30 cm

19: The effective span of a simply supported slab, is

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

B.   Distance between the centres of the bearings

C.   None of these

D.   Clear span plus effective depth of the slab

20: In a simply supported slab the minimum spacing of distribution reinforcement, should be four times the effective thickness of the slab or

A.   40 cm

B.   50 cm

C.   60 cm

D.   30 cm

E.   20 cm