Exam 6: Concrete Design and Structural Analysis

A pre-stressed concrete member

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

Design of R.C.C. cantilever beams, is based on the resultant force at

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

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

On piles, the drop must be at least

Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as

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

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

The minimum cube strength of concrete used for a pre-stressed member, is

A circular slab subjected to external loading, deflects to form a

For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, 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

The maximum shear stress (q) in concrete of a reinforced cement concrete beam is

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

The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is

If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be

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

A flat slab is supported

In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? and pre-stressed load P. The net downward load at the centre is