RCC Structures Design Mcqs

This set of Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “ RCC Structures Design ”. These Mcqs are chosen from a collection of most authoritative and best reference books on Civil Engineering. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams, Jobs and interviews. One should practice our MCQS to assimilate RCC Structures Design comprehensively.

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The width of the flange of a L-beam, should be less than______________?

One- sixth of the effective span

Breadth of the rib + four times thickness of the slab

Breadth of the rib + half clear distance between ribs

Least of the above

An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam________________?

Is safe in shear

Is safe with stirrups

Is safe with stirrups and inclined bars

Needs revision of section

Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension_______________?

Two times

Three times

Four times

Five times

A pre-stressed concrete member is preferred because___________________?

Its dimensions are not decided from the diagonal tensile stress

Large size of long beams carrying large shear force need not be adopted

Removal of cracks in the members due to shrinkage

All the above

If is the net upward pressure on a square footing of side for a square column of side , the maximum bending moment is given by_________________?

B.M = pb (c – a)/4

B.M = pb (b – a)²/4

B.M = pb (b – a)²/8

B.M = pb (b + a)/8

To ensure uniform pressure distribution, the thickness of the foundation, is__________________?

Kept uniform throughout

Increased gradually towards the edge

Decreased gradually towards the edge

Kept zero at the edge

longitudinal bars and lateral stirrups, is__________________?

Stress in concrete × area of concrete

Stress in steel × area of steel

Stress in concrete × area of concrete + Stress in steel × area of steel

None of these

Pick up the incorrect statement from the following: Tensile reinforcement bars of a rectangular beam_______________?

Are curtailed if not required to resist the bending moment

Are bent up at suitable places to serve as shear reinforcement

Are bent down at suitable places to serve as shear reinforcement

Are maintained at bottom to provide at least local bond stress

The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of___________________?

10 mm

15 mm

20 mm

25 mm

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

Top bars are extended to the projecting parts of the combined footing of two columns Ldistance apart for a distance of_______________?

0.1 L from the outer edge of column

0.1 L from the centre edge of column

Half the distance of projection

One -fourth the distance of projection

is the pre- stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is________________?

F = (P/A) – (Z/M)

F = (A/P) – (M/Z)

F = (P/A) – (M/Z)

F = (P/A) – (M/6Z)

If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young’s modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is________________?

(1 – C) mf – eE

(C – 1)mf + eE

(C – 1)mf – eE

(1 – C)mf + eE

An R.C.C. lintel is spanning an opening of 2 m span in a brick wall. The height of the roof is 2.9 m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus_______________?

Triangular load of the wall

UDL of wall

UDL of wall + load from the roof

Triangular load + load from the roof

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