Rcc structures design

1. If the depth of actual neutral axis of a doubly reinforced beam A. Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier B. Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier C. Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously D. All the above

Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier
Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier
Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously
All the above

Detailed SolutionIf the depth of actual neutral axis of a doubly reinforced beam A. Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier B. Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier C. Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously D. All the above

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2. In a singly reinforced beam A. Compression is borne entirely by concrete B. Steel possesses initial stresses when embedded in concrete C. Plane sections transverse to the centre line of the beam before bending remain plane after bending D. Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

Compression is borne entirely by concrete
Steel possesses initial stresses when embedded in concrete
Plane sections transverse to the centre line of the beam before bending remain plane after bending
Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

Detailed SolutionIn a singly reinforced beam A. Compression is borne entirely by concrete B. Steel possesses initial stresses when embedded in concrete C. Plane sections transverse to the centre line of the beam before bending remain plane after bending D. Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

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3. Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to A. Shear force B. Area of the section C. Distance of the C.G. of the area from its neutral axis D. Moment of the beam section about its neutral axis

Shear force
Area of the section
Distance of the C.G. of the area from its neutral axis
Moment of the beam section about its neutral axis

Detailed SolutionPick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to A. Shear force B. Area of the section C. Distance of the C.G. of the area from its neutral axis D. Moment of the beam section about its neutral axis

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5. In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as A. A key B. A cut-off wall C. A rib D. All the above

A key
A cut-off wall
A rib
All the above

Detailed SolutionIn case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as A. A key B. A cut-off wall C. A rib D. All the above

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9. The effective span of a simply supported slab, is A. Distance between the centers of the bearings B. Clear distance between the inner faces of the walls plus twice the thickness of the wall C. Clear span plus effective depth of the slab D. None of these

Distance between the centers of the bearings
Clear distance between the inner faces of the walls plus twice the thickness of the wall
Clear span plus effective depth of the slab
None of these

Detailed SolutionThe effective span of a simply supported slab, is A. Distance between the centers of the bearings B. Clear distance between the inner faces of the walls plus twice the thickness of the wall C. Clear span plus effective depth of the slab D. None of these

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