If P kg/m2 is the upward pressure on the slab of a plain concrete footing whose

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Civil Engineering ‣ RCC Structures Design Comments

Question
If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by
Options
A. D = 0.00775 aP
B. D = 0.0775 aP
C. D = 0.07775 aP
D. D = 0.775 Pa

Correct Answer

D = 0.00775 aP

RCC Structures Design problems

Search Results

1. In a singly reinforced beam
Options
A. compression is borne entirely by concrete
B. steel possesses initial stresses when em-beded in concrete
C. plane sections transverse to the centre line of the beam before bending remain plane after bending
D. elastic modulii for concrete and steel have different values within the limits of deformation of the beam
E. none of these.

2. As per IS : 456, the reinforcement in a column should not be less than
Options
A. 0.5% and not more than 5% of cross-sec-tional area
B. 0.6% and not more than 6% of cross-see-tional area
C. 0.7% and not more than 7% of cross-sec-tional area
D. 0.8% and not more than 8% of cross-sectional area
E. none of these.

3. 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
Options
A. triangular load of the wall
B. UDL of wall
C. UDL of wall + load from the roof
D. triangular load + load from the roof.

5. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is
Options
A. 300 cm
B. 233 cm
C. 176 cm
D. 236 cm
E. 255 cm

6. If the length of a combined footing for two columns l metres apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where x is the distance of centre of gravity of column loads).
Options
A. y = L - (l - x)
B.
C.
D.

9. In a cantilever retaining wall without a heel slab
Options
A. thickness of the stem is kept same throughout
B. base slab is made 10 cm thicker than the stem
C. width of the base slab is kept 0.7 time the total height of the wall
D. all the above.

Comments

More in Civil Engineering: