Civil Engineering :: RCC Structures Design

In a combined footing if shear stress exceeds 5 kg/cm^{2}, the nominal stirrups provided are:

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

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

Post tensioning system

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

The width of the flange of a Tbeam should be less than

A prestressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central onethird portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

Pick up the correct statement from the following:

. Cantilever retaining walls can safely be used for a height not more than

If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is

If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least

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

If the average bending stress is 6 kg/cm^{2} for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is

Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than

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

The design of a retaining wall assumes that the retained earth

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

The thickness of base slab of a retaining wall generally provided, is

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

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

An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at

The effective span of a simply supported slab, is

Pick up the incorrect statement from the following:

. The minimum cube strength of concrete used for a prestressed member, is

The number of treads in a flight is equal to

A short column 20 cm x 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm^{2} and 300 kg/cm^{2}, the Safe load on the column, should not exceed

The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm^{2}, safe shear stress 5 kg/cm^{2} and B.M. 24 mt,

In a beam the local bond stress S_{b}, is equal to

According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is

For initial estimate for a beam design, the width is assumed

If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width

The advantage of a concrete pile over a timber pile, is

If the permissible compressive stress for a concrete in bending is C kg/m^{2}, the modular ratio is

If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is

To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

The width of the flange of a Tbeam, which may be considered to act effectively with the rib depends upon

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

Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at

The transverse reinforcements provided at right angles to the main reinforcement

The amount of reinformcement for main bars in a slab, is based upon

If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is

The percentage of minimum reinforcement of the gross sectional area in slabs, is

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

If T and R are tread and rise respectively of a stair, then

If k is wobble correction factor, Î¼ is coefficient of friction between the duct surface and the curve of tendon of radius R, the tension ratio at a distance x from either end, is

In a prestressed beam carrying an external load W with a bent tendon is having angle of inclination Î¸ and prestressed load P. The net downward load at the centre is

The effective width of a column strip of a flat slab, is

High strength concrete is used in prestressed member
A.


B.
A pile is a slender member which transfers its load to the surrounding soil 

C.
A pile is a slender member which transfers its load by friction 

D.
A pile is a cylindrical body of concrete which transfers the load at a depth greater than its width. 
A.
\( \frac { \text{shear fore} } { \text{Lever arm *Total perimeter of reinforcement} } \) 
B.
\( \frac { \text{Total perimeter of reinforcement} } { \text{Lever am*shear force} } \) 
C.
\( \frac { \text{Lever arm}} { \text{shear force*Total perimeter of reinforcement}}\) 
D.
\(\frac { \text{Lever arm} } { \text{Bendimg moment 8Total perimeter} }\) 